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[A] AAFE Aeroassist Flight Experiment ABCL As Built Configuration List ABHRS As Built Hardware Reporting System AC Alternating Current AC Comptroller Office ACES Acoustic Containerless Experiment System ACIP Assembly Configuration and Integration Panel ACR Active Cavity Radiometer ACRIM Active Cavity Radiometer Irradiance Monitor ACRBC Acceptance, Checkout, Retest, and Backout Criteria ACRC Assured Crew Return Capability - Now ACRV ACRV Assured Crew Return Vehicle ACTS (TOS) Advanced Communications Technology Satellite AD Aperture Door ADC Affiliated Data Center ADEOS Advanced Earth Observing Mission ADP Acceptance Data Package ADP Automated Data Processing ADPS Acceptance Data Package System ADSF Advanced Directional Solidification Furnace AEG AEG Telefunken AEPI Atmospheric Emissions Photo Imaging AES Application Engineering Services AES Atmospheric Exchange System AESE Airborne Electrical Support Equipment AFB Air Force Base AFD Aft Flight Deck AFE American Flight Echocardiograph AFP Air Force Program AFR Air Force Regulation AFSCF Air Force Satellite Control Facility AFTE Autogenic Feedback Training Experiment AFTA Aft Frame Tilt Actuator AGOSS Automated Ground Operations Scheduling System AHU Air Handling Unit AI Artificial Intelligence AIRS Atmospheric Infrared Sounder AIT Aeritalia A/L Air Lock ALAE Atmospheric Lyman Alpha Experiment ALC Augmented Landing Site ALERT Acute Launch Emergency Reliability Tip ALRUTS Automated Line Replaceable Unit Tracking System ALS Advanced Launch System ALT Altimeter AMF Astronaut Memorial Foundation AMSU Advanced Microwave Sounding Unit ANSI American National Standard Institute AO Assembly Order AOA Abort Once Around APC Adaptive Payload Carrier APCS Automated Project Control System - ARTEMIS APID Applications Process Identification APS Acquisition Processor Subsystem ARC Ames Research Center ARC Aggregation of Red Cells ARS Archive and Retrieval Subsystem (PPCU) ARTEMIS Project Management Software System - Metier Product ARTS Automated Resource Tracking System - ARTEMIS ASCII American Standard Code for Information Interchange ASE Airborne Support Equipment ASP Attitude Sensor Package ASRS Automated Support Requirements System ASSY Assembly AST Astro Star Tracker ASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer ASTG Aerospace Test Group ATC Absolute Time Command ATCS Active Thermal Control System ATE Automated Test Equipment ATLAS Atmospheric Laboratory for Applications and Science ATMOS Atmospheric Trace Molecule Spectroscopy ATP Accelerated Training Program ATP Acceptace Test Procedure AWAD Assembly Work Authorization Document [B] B Bit BLOW Booster-Lift-Off Weight B&P Budgetary and Planning B&W Black and White B-1 DIV B-1 Division (Rockwell) B/A Bank Angle B/A Barometric Altimeter B/A Buffer Amplifier B/C Bench Check B/L Baseline B/O Booster Orbiter B/O Breakout B/O Burnout B/SC Brake Skid Control B/SMPL Bits per Sample B/U Backup B/V Bleed Valve B/W Black and White B/sec Bits per Second BA Bank Angle BA Breathing Air BAC Boeing Aircraft Company BAC Booster Assembly Contractor BAC Buffer Access Card BACS Body Axis Coordinate System BAI Barometric Altitude Indicator BAIR Breathing Air BAL Balance BAN Budget Allocation Notice BARB Ballast Aerating Retrieval Boom BARO Barometer BARS Baseline Accounting and Reporting System BASD Ball Aerospace Systems Division BASS Backup Avionics System Software BATT Battery BB Breadboard BBC Before Business Clearance BC Battery Charger BC Binary Counter BC Bus Coupler BCCT Break Control Command Transducers BCD Binary Coded Decimal BCE Backup Control Electronics BCE Bus Control Element BCFS Backup Flight Control System BCH Binary Coded Hexadecimal BCH Bose-Chaudhuri-Hocquenghen (Computer Code) BCN Beacon BCP Base Condemnation Percent BCP Benchmark Control Point BCR Bar Chart Report BCRD Basic Consolidated Requirements Document BCRT Binary Code Range Time BCT Bus Configuration Table BCU Bus Control Unit BCWP Budget Costs for Work Performed BCWS Budget Costs for Work Scheduled BD Band BD Binary Decoder BD Binary Digit BD Binary Discrete BD Board BDA Backup Drive Amplifier BDA Bermuda Island BDA Bermuda (STDN) BDA Blast Danger Area BDA Backup drive amplifier BDC Bi-Directional Converter BDC Bit Error Rate BDCF Baseline Data Collection Facility BDCR Baseline Document Change Request BDD Baseline Definition Document BDT Block Data Transfer BDY Body BDYFLP Body Flap BECO Booster Engine Cutoff BER Bit Error Rate BFC Backup flight control BFCS Backup flight control system BFS Backup flight system BITE Built-in test equipment BLK Block BLR Boiler BLS Bottom Left Side BLV Bleed Valve BLWR Blower BM Basal Metabolism BM Business (Branch) Manager BM Body Mounted BMA Body-Mounted Accelerometer BMAG Body-Mounted Attitude Gyro BMAP Buffer Map BMB Base Maintenance Building BME Bench Maintenance Equipment BMFT German D-1 Spacelab Payload BMMD Body Mass Measuring Device BMS Background Measurement Satellite BMU Bus Monitor Unit BN Ballistic Number BO Breakout Box BOB Best on Best BOD Beneficial occupancy Date BOE Break of Entry BOF Beginning of File BOI Break of Integrity BOM Beginning of Month BOM Bill of Materials BOP Baseline Operations Plan BOPACE Boeing Plastic Analysis Capability for Engines BOS Backup Operating System BOS Bright Object Sensor BOT Beginning of Tape BOT BOTSWANA (STDN) BOW Bill of Work BP C-BD C-Band BP C/SCSC Cost/Schedule Control Systems Criteria BP C/D Countdown BP C&T Communication and Tracking BP C&TSS Communication and Tracking Subsystem BP Barber Pole BP Blood Pressure BP Bandpass BP C/S Counts per Second BP C/W Carrier Wave BP C/P Cold Plate BP Checkout BP C/0 Changeout BP Closed Loop BP C/L Checklist BP C/F Center Frequency BP C/R Commutation Rate BP C/C Combustion Chamber BP C-to-C Computer-to-Computer BP C-C Carbon-Carbon BP C-Band 3900 to 6200 MHz BP Caution and Warning BP C&W Caution and Warning BP Contamination/Overpressure BP CA California BP C&M Control and Monitoring BP C&DS Command and Data Simulator BP C&DH Command and Data Handling BP C&D Control and Display BP One Hundred BP Cycle BP Constant BP Complete BP Coeff icient BP Centigrade BP Celsius BP Capacitance BP Back Pressure BP Cutoff BP Boilerplate BP c BP c Candle BPD Baseline Program Documentation BPI Bits per Inch BPM Beats per Minute BPMS Blood Pressure Measuring System BPR Bypass Ratio BPS Bits Per Second BPT Body Point BPV Bipropellant Valve BR Bit Rate BRAVO Business Risk and Value of Operation in Space BRCS Basic Reference Coordinate System BRG Bearing BRK Brake BRKT Bracket BRM Biological Research Module BRPM Breath Rate per Minute BRRS Banana River Repeater Station BRS Bottom Right Side BRT Bright BS Block Specification BSC Brake Skid Controller BSDP Booster Stage Discharge Pressure BSE Booster Systems Engineer BSI Basic Shipping Instructions BSI "Boeing Services International, Inc." BSM Booster Separation Motors BSM Booster separation motor BSR Basic System Release BSR Bite Status Register BSRM Booster Solid Rocket Motor BSS Backup System Services BSTR Booster BT Burn Time (Engine) BTC Bus Tie Contractor BTC Binary Time Code BTMS Body Temperature Measuring System BTR Burn Time Remaining BTR Boom Time Remai-ni'ng BTR Bus Transfer BTU Bus Terminal Unit BU Backup BUC Backup Computer BUC "Buckhorn, CA (GSTDN)" BUFF Buffer BUOU Backup Optical Unit BUR Backup Rate BW Bridgewire BW Bandwidth BX Box BY Budget Year BYP Bypass Btu British Thermal Unit [C] C ofF Cost of Facilities C ofF Construction of Facilities C&T Communications and tracking C/W Caution and warning CA Carrier Aircraft CA Contingency Abort CA Cone Angle CA Contract Award CA Corrective Action CA Cost Account CAB Cabin CAB Cabinet CAB Civil Aeronautics Board CAB Cost Audit Board CACB Center Aisle Connector Bracket CACC Communications and Configuration Console CACON Cargo Container CAD Computer Aided Design CADE Controller/Attitude-Direct Electronics CADS Command and Data Simulator CADSI Communications and Data Systems Integration CADU Control and Display Unit CAL "Calibrate, Calibration" CAL Cornell Aeronautical Laboratory CALC Calculate CAM Computer Aided Manufacturing CAM Content Addressable Memory CAM Carrier Aircraft Modification CAM Computer Annunciation Matrix CAM R Camera CAN Certification Analysis Network CAP Contractor Acquired Property CAP Crew Activity Plan CAP CCMS Application Programs CAP "Capacitor, Capacity" CAP Cost Account Package CAP Computer Application Program CAPCOM Capsule Communicator CAPRI Captive Reset ignitor CAPS Common Attitude Pointing System CAPS Crew altitude protection system CAPSIM Captive Simulation CAR Certification Approval Request CAR Configuration and Acceptance Review CAR Corrective Action Request CARID Customer Acceptance Review Item Disposition CARR Customer Acceptance Readiness Review CAS Calibrated Airspeed CAS Command Augmentation System CAS Control Augmentation System CASO Cancellation Addendum Sales Order CASP CDS APPlication SL'pport Programs CASS CITE Augmentation Support System CATEG Category CAU Customer Acquisition Unit CAU Command Acquisition Unit CAU Command Activation Unit CAUT Caution CB Center of Buoyancy CB Circuit Breaker CB Constant Bandwidth CB/ac Circuit Breaker (ac only) CB/dc Circuit Breaker (dc only) CBA C-Band Transponder Antenna CBC Complete Blood Count CBE "Connector Bracket, Experiment" CBIL Common and Bulk Items List CBP Connector Bracket Power CBS Connector Bracket Signal CBSA Cargo Bay Stowage Assembly CBV Cabin Bleed Valve CBW Constant Bandwidth CBX C-Band Transponder CBrF3 Bromotrifluoromethane (Fire-Extinguishing Material) cal Calories cc Channel Controller cc Crew(s) Certified cc Crew Compartment cc Chief Counsel (KSC Directorate) cc Cost Center cc Communications Control cc Carbon-Carbon ccc Complex Control Center ccc Central Computer Complex ccc Communication(s) Control Console ccc Controller Checkout Console ccc Contaminant Control Cartridge CCA Communications Carrier Assembly CCA Contract Change Authorization CCA Coolant Control Assembly CCA Contract Change Authorization CCA Communications carrier assembly CCAFS Cape Canaveral Air Force Station CCAFS Cape Canaveral Air Force Station CCATS "Command, Communication, and Telemetry System" CCB Configuration Change Board CCB Change Control Board CCB Configuration Control Board CCBD Configuration Control Board Directive CCD Charge Coupled Device CCD Checkout Command Decoder CCD Constants Change Display CCDR Contractor Critical Design Review CCE Computer Command Engineer CCF Converter Compressor Facility CCFF Cape Canaveral Forecast Facility CCIR International Radio Consultative Committee CCL Closed Circuit Loop CCL Commonality Candidate List CCL Configuration Control Logic ccm Crew/Cargo Module ccm Controlled Carrier Modulation ccms Command Control and Monitor System ccms "Checkout, Control, and Monitor Subsystem (LPS)" CCM E Contract Change Mass Estimate CCMS "Checkout, control and monitor system" CCN Contract Change Notice CCN Contract Change Negotiation CCOH "Corrosive Contaminants, Oxygen, and Humidity" CCP Center Console Panel CCP Configuration Control Phase CCP Commercial Change Proposal CCP Cost Control Program CCP Charge Capacitance Probe CCP Contract Change Proposal CCP Configuration Control Panel CCP Configuration Change Point CCP ComPuter Control Panel CCR Contractor Change Request CCR Control Center Rack CCRA Cape Canaveral Reference Atmosphere CCRF Consolidated Communication Recording Facility CCS Command and Control Subsystem CCS Contamination Control System CCS Console Communication System CCS Computer Core Segment CCS Complex Control Set CCS Command and Communication System CCS Central Control Station CCS Central Control Section CCT Computer Compatible Tape CCTV Closed Circuit Television CCTV Closed-circuit television CCU Central Control Unit CCU Crewman Communications Umbilical CCU Camera Control Unit CCU Crew communications unit CCU Communications carrier umbilical CCV Chamber coolant valve CCW Counterclockwise CCVA Chamber Coolant Valve Actuator CCiM Command Computer Input Multiplexer CD Command Decoder MDM CD Coefficient of Drag CD Candella (Luminous Intensity) CD Center Director (KSC Directorate) CDA Critical Design Audit CDA Command and Data Acquisition CDB Command Data Base CDB Central Data Buffer CDBFR Common Data Buffer CDC Confined Detonating Cord CDC Countdown Clock CDDT Countdown Demonstration Test CDF Cable Distribution Frame CDF Central Data Facility CDF Circuit Design Fabrication CDF Confined Detonating Fuse CDF Cool-Down Facility CDF Confined detonating fuse CDF&TDS "Circuit Design, Fabrication, and Test Data Systems" CDH Constant Delta Height CDI Course Deviation Indicator CDI Course deviation indicator CDM Communications/Data Manager CDMS Command and Data Management Subsystem CDMS Command and data management system CDN CDR Discrepancy Notice CDNR CDR Discrepancy Notice Record CDP Command Data Processor CDPIS Command Data Processing and Instrumentation System CDQR Critical Design and Qualification Review CDR Commander CDR Critical Design Review CDR "Cleaning, Decontamination Request" CDRL Contract Data Requirements List CDRR Contract Documentation Requirements Records CDS Central Data Subsystems (LPS) CDS Central Data System CDS Closeout Door System CDS Collision Detector System CDS Control Data Corporation CDS Control Data System CDS Central data subsystem CDSC Communications Distribution and Switching Center CDT Configuration Data Table CDT Compressed Data Tape CDT Command Descriptor Table CDT Central Daylight Time CDT Countdown Time CDU CRT Display Unit CDU Coupling Data Unit CDU Coupling Display Unit CDU Computer Display Unit CDU Control and Display Unit CDW Command Data Word CDW Computer Data Word CE Cost Element CE Control Element CE Civil Engineering CE Change Evaluation CE Current Expendable CEA Control Electronics Assembly (for MMU) CEC Control Encoder Coupler CECP Compatibility Engineering Change Proposal CEDC Cyclic Error Detection Code CEI Contract End Item CEI Configuration End item CEIAC Coastal Engineering Information Analysis Center CEIT Crew Equipment Interface Test CEIT Crew Equipment Integration Test CEIT Crew equipment interface test CEQ Council on Environmental Quality CER Cost Estimating Relationship CERT Certification CES Crew Escape System CES Control Electronics System CF Centrifugal Force CF Center Forward CF Carrier Frequency CFD "Converter, Frequency to dc Voltage" CFE Contractor Furnished Equipment CFES Continuous Flow Electrophoresis System CFI Card Format Identifier CFM Customer Furnished Material CFM Cubic Feet per Minute CFMF Crip Flow Management Facility CFP Conceptual Flight Profile CFR Code Federal Regulation CFRP "Carbon Fiber Reinfr-,rced Plastics" CFSTI Clearinghouse for Scientific and Technical informatio CFT Common Facilities Test CFY Company Fiscal Year CG Center of Gravity CGAU Cabin Gas Analysis Unit CGC Command Guidance Computer CGP Central Grounding Point CGSS Cryogenic Gas Storage Subsystem CH Channel CH 4 Methane CHAN Channel CHAR Character CHCS Cabin Humidity Control Subsystem CHG Change CHG Charge CHGR Charger CHL Certified Hardware List CHL Channel CHMBR Chamber CHR Cooper-Harper Rating CHUTE Parachute CHX Cabin Heat Exchanger CI Course (deviation display) invalid CI Color Interior Film CI Configuration inspection CI Configuration Item CI Certification Inspection CI Crew Interface CI Continuous Interlock CIC Command Interface Control CIC Control and Information Center CICU Computer Interface Control Unit CICU Computer Interface Conditioning Unit CIA Control Interface Assembly CIA Controller interface assembly CIAP Climatic Impact Assessment Program CIB Change Implementation Board CIB Change Impact Board CiCC Cargo Integration Control Center CICU Communication interface control unit CiSS Centaur integrated Support Structure CID Computer Interface Device CIDL Configuration Item Data List CIDR Critical Intermediate Design Review CIE Communications interface Equipment CIF Central Instrumentation Facility CIG Cable Integrity Group CIG Communications and Interface Group CIL Critical Items List CIM Computer Input Multiplexer CIN Change Identification Number CIR Circulate CIR Configuration inspection Report CIR Circle CIR Cargo Integration Review CIRC "Circularization Burn, OMS2" CIRCUM Circumference CIRHS Critical Items and Residual Hazards List CIS Contractor's Information Submittal CIS Central Integration Site CIS Component Identification Sheet CIS Communication Interface System CIS Change Impact Summary CIS Communications interface system CIT Critical Item Tag CITE Cargo Integration Test Equipment CITE Cargo integration test equipment CIU Communication interface unit CIU Computer Interface Unit CIU Controller Interface Unit CIVT Cargo Interface Verification Test CK Check CKAFS Cape Kennedy Air Force Station (Changed to CCAFS) CKPT Checkpoint CKRA Cape Kennedy Reference Atmosphere (Changed to CCR CKS Checks CKT Circuit CL Centerline CL Closed Loop CL Closed Loop Contro! Logic CL Close (Closed) CL Coefficient of Lift CL Cluster Class Classification CLC Change Letter Control CLDST Closed Loop Dynamic Stability Test CLG Ceiling CLIP Combined Laser Instrumentation Package CLM Care Logic Module CLMC Central Logistics Management Center CLNR Cleaner CLR Clear CLRB Cost Limit Review Board CLS Contingency Landing Site(s) CLSO Contingency Landing Support Officer CLT Closed Loop Test cm Centimeter cm Control Monitor cm Center of Mass cm Cargo Management cm Configuration Management cm Consumables Management cm Crew Module CM&S Communications Maintenance and Storage CMA Configuration Management Accounting CMACS Central Monitor and Control System CMAO Contract Management Assistance Officer CMAT Compatible Materials (List) CMC Command Module Computer CMC Crew Module Computer CMD Command CMD DCDR Command Decoder CMG Control Moment Gyro CMM Condition Monitored Maintenance CMN Crewman CMO Configuration Management Office CMOS Complementary Metal Oxide Silicon CMP Configuration Management Plan CMPR Compare CMPRT Compartment CMPTD Computed CMPTR Computer CMPTR ACTY Computer Activity CMR Center Materials Representative CMRB Contractor Material Review Board CMRR Common Mode Rejection Ratio CMS-2 Cambridge Monitoring System (IBM Computer Program) CMSi Checkout/Control and Monitor Subsystem Interface CMTS Computerized Maintenance Test System CMV Common Mode Voltage CN Change Notice CNDS Condensate CNRL Communications and Navigation Research Laboratory CNSL Console CNTL Control CNTR Counter CNTRL Controller CNTRL Control CNWDI Critical Nuclear Weapons Design Information CO Carbon monoxide Co Cargo Operations (KSC Directorate) Co Cutoff Co Contracting Officer Co Change Order CO2 Carbon dioxide COA Center Operations Area COAS Course Optical Alignment Sight COAS Crew(man) Optical Alignment Sight COAS Crewman optical alignment sight COAX "Coaxial, Coaxial Cable" COB Communications Office Building COBE Cosmic Background Explorer COBOL Common Business Oriented Language COC Close-Open-Close COD Center Operations Directorate (JSC) COE Corps of Engineer COFI Checkout and Fault Isolation (on Board) COFR Certificate of Flight Readiness COFW Certificate of Flight Worthiness COIM Checkout Interpreter (Software) Module COL Checkout Language COL Coast Orbital Insertion COLM Column com Computer Output Microfiche com "Common, Commonality" com-m Common Mode comm Communications COMAS Combined Orbital Maneuvering and Abort System COMAT Compatibility of Materials COMB Combustion COMEC Communications Security COMMAND Computer Command Engineer COMP Computation of Rendezvous Targeting COMP Component COMP Compensate COMP Compass COMP Computer COMPEN Compensator COMPL Completed COMPOOL Common Data Pool COMPR "Compress, Compressor" COMPT COmPartment COMR&DSAT Communication Research and Development Satellite COMSAT Communications Satellite COMSEC Communications Security CON Contact CONCN Concentration COND "Condition, Conditioner" COND Condenser CONDR Conditioner CONF Conference CONFIG Configuration CONN "Connect, Connector" CONS Console CONSTR "Construct, Construction" CONT Container CONT Contingency CONT "Continue, Continued, Continuous" CONTAM Contaminate CONTIG Contiguous CONTR "Control, Controller" CONUS Continental United States CONV Converter COOP Cooperative COORD Coordinate COP Contingency Operations Plan COQ Certificate of Qualification COR Contracting Officer Representative CORE Common Operational Research Equipment COS Carry-on Oxygen System COS Console Operating System COS Cosine COSATI Committee on Scientific and Technical Information COSI Closeout System Installation COSTA Cost Accounting (Code) COV Cutoff Valve CP Cargo Projects Office (KSC) CP Cargo Program Office (KSC) CP Candle Power CP Center of Pressure CP Cold Plate CP Console Processor CP Chemically Pure CP Circular Pitch CP Control Panel CP Control Point CP-DPO Deployable Payloads Projects Office (KSC) CP-FEO Cargo Facilities and GSE Projects Office (KSC) CP-PCO Cargo Projects-Program Control Office CP-SPO Spacelab Projects Office (KSC) CPA Contingency Planning Aid CPA Critical Path Analysis CPAF Cost Plus Award Fee CPC Computer Program Component CPC Central Planning Center CPC Characteristics Properties Code CPC I Computer Program Change Instruction CPCB Crew Procedures Control Board CPCEI Computer Program Contract End Item CPCI Computer Prograni Configuration Item CPCL Computer Program Control Library CPCL Computer Program Change Library CPCR Computer Program Change Request CPCR Crew Procedures Change Request (Form 482) CPD "Converter, Pulse to dc Voltage" CPD Crew Passive Dosimeter CPD Crew Procedures Division CPD R Contractor's Preliminary Design Review CPDDS COmPuter Program Detail Design Specification CPDS Computer Program Design (or Development) Specificat CPDS Crew Procedures Documentation System CPE Chief Program Engineer CPE I Computer Program End Item CPES Crew Procedures Evaluation (Evaluator) Simulator CPF Cost per Flight CPF Cargo Processing Facility CPF Central Processing Facility CPFF COst Plus Fixed Fee CPG Change Planning Group CPI Cross Pointer Indicator CPI Crosspointer indicator CPIF COst Plus Incentive Fee CPL Couple CPLT Complete CPM Computer Program Module CPM Critical Path Method CPM Cycles per Minute CPMP Crew Procedures Management Plan CPR Critical Problem Report CPS Cycles Per Second CPSE Common Payload SuPport EquiPment CPSS Cold Plate Support Structure CPSS Critical Phase System Software CPT Computer Program Tapes CPT Cargo Processing Technician CPU Central Processing Unit CPU Computer Printer Unit CPU Central processor unit CQD R Critical Qualification Design Review CR Card Reader CR Certification Requirement CR Crew CR Control Room CR Change Request CR Configuration Review CR/DIR Change Request Directive CRAS Cost Reduction Alternative Study CRB Change Review Board CRC Contractor Recommended Code CRC Cost Reduction Curve CRD Change Request Disposition CRDP Computer Resources Development Plan CRES Corrosion Resistant Steel CRG Change Review Group CRG Correspondence Review Group CRIS Calibration Recall and Information System CRISP Computer Resources Integrated Support Plan CRIT Critical CRM Chemical Release Module CRMD Computer Resources Management Data CRN Contract Revision Number CRN Cable Routing Rotation CRO Cathode Ray Oscillograph(s) or Oscilloscopes CRP Configuration Requirements Processing CRPL Cosmic Ray Physics Laboratory CRR Critical Requirements Review CRR Computer Run Report CRS Cross CRS Course CRS C02 Reduction Subsystem CRSFD Crossfeed CRSI Ceramic Reusable Surface Insulation CRSVR Crossover CRT Cathode-Ray Tube CRT Cathode ray tube CRTG Cartridge CRW Control Read/Write CRYO Cryogenic cs STS Cargo operations (KSC Directorate) cs Common Set cs Consumables Status cs Change Status cs Checkout Station cs Control Segment cs Core Segment cs Crew Station cs Spacelab Operations Directorate CSA CYclic Strain Attenuator CSAM Crinkled Single Aluminized Mylar CSAS ComPuterized Status Accounting System CSAT Combined Systems Acceptance Test csc Computer Sciences Corporation csc Cosecant COMPuting Amplifier csc Conical Shaped Charge csc Contingency SuPport Center (CCAFS) CSCB Contractor's Summary Cost Breakdown CSCSAT Commercial Synchronous Communication Satellite CSD Crew Systems Division CSD Control System DeveloPment CSD Chemical Systems Division CSD L Charles Stark Draper Laboratory (MIT) CSDD Control Systems DeveloPment Division (JSC) CSDF Central Source Data File CSDT COMPuter Software Data Tapes CSE Communications Systems Engineer CSE Computer Support Equipment CSE Configuration Switching EquiPment CSE Common Support EquiPment CSF Cost Sensitivity Factor CSF Central Supply Facility csi Coelliptic Sequence Initiation csi Control Servo Input csi Crew Software Interface CSIR Review CSIR Computer Systems (Hardware/Software) Integration CSL Crew Systems Laboratory CSL Computer Status Lights CSL Command Signal Limiter CSOP Crew Systems Operating Procedures CSP Computer Support Program CSPU Coi-e Segment Processing Unit CSR Crew Station Review CSR Check Signal Return CSR Crew Station Review CSR Certification Status Report CSRP Computers and Software Review Panel CSS Control stick steering CSSE Control System Simulation Equipment CST Crew Station Trainer CST Contract Supplemental Tooling CST Crew Systems Trainer (One-G Trainer) CST Combined Systems Test CST Central Standard Time CSTA Crew Software Training Aid CSTR Canister CSTS Cryogenic Storage and Transfer System CSiU Core Segment Interface Unit csm Computer Status Matrix csm Command Service Module csm Common Support Module csoc Consolidated Space Operations Center css Control Stick Steering css Computer Subsystem css Core Segment Simulator CT Crawler Transporter CT Current Transformer CTA Computer Technology Associates (GSFC) CTA Controlled Thrust Assembly CTC "Camera, Timing, and Control" CTC Chief Test Conductor CTE Central Timing Equipment CTI Critical Transportation Item CTIS Crawler Transporter Intercom System CTL Central or Control CTL Canoga Test Laboratory CTM Crystalline Transitional Material CTM Contract Technical Manager CTN Certification Test Network CTP CYclic Time Processor CTP Communications Timing Procedure CTPD Crew Training and Procedures Division (JSC) CTR Contract Technical Representative CTRS Component Test Requirements Specifications CTS Ci'mPuter Test Set CTS COMPuterized Training System CTS Communications and Tracking System CTS Canadian Technology Satellite CTSD ComPuter Test Sequences Document CTSD Coordinate Transformation SYstem CTTB Checkout Techniques Test Bed CTU Central Timing Unit CTWT Counterweight CUB Commonality Usage Board CUDS Cumulative Data Statistics CUE Common Usage Equipment CUF Cross Utilization File CUIL COmmon Usage Item List CUP Commonality Usage ProPosal CVAD "Converter, Voltage, ac to dc" CVAS Configuration Verification Accounting System CVDA "Converter, Voltage Discrete, ac" CVE Complete Vehicle Erector CVR Change Verification Record CVR Configuration Verification Review CVRD "Converter, Variable Resistance, to dc Voltage" CVT Communications Vector Table CVT Concept Verification Testing CWA Clean Work Area CWA Caution and Warning Annunciator CWA Controlled Work Area CWE Caution and Warning Electronics CWEA Caution and Warning Electronic Assembly CWEU Caution and Warning Electronics Unit CWFSP Caution and Warning/Fire Suppression Panel CWG Constant Wear Garment CWLM Caution and Warning Limit Module CY Calendar Year CY Cycle CYL Cylinder cu Control Unit cu Cubic cuc ComPuter Usage Control cum Cumulative cv Check Valve cv Coefficient of Variation cv Deployable Payloads Operation (KSC Co Dir.) cv Expendable Vehicles Operations (KSC Directorate) cvm Control Valve Module cw Continuous Wave cw Command Word cw Clockwise cws Caution and Warning System cws Caution and Warning Status cwsu Caution and Warning Status Unit cwsu Condensate Water Servicing Unit cx Color Exterior Film [D] dB Decibel dP/dT Delta pressure/delta time dc DCAS Data Collection and Analysis System dc DCAR Design Corrective Action Report dc Defense Contract Administration Services dc DCAA Defense Contract Audit Agency dc Design Change Authorization dc Digital Command Assembly dc DCA Defense Communication Agency dc Direct Current dc Distribution Control Assembly D Deck D Drag D Down D Delta D Deliver (Delivery) D LSC DLTR Data Link Terminal Repeater D LSC DLSM Data Link Summary Message D LSC Defense Logistics Service Center D LSC Data Link Transmission Repeater D&C DisplaY and Control (C&D preferred) D&C Displays and controls D&CS Display and Controls Subsystem D&O DescriPtion and Operations D&P Drain and Purge D/A Digital to Analog D/C DisplaYs/Controls D/L Deorbit/Landing D/L Data Link D/L Downlist D/L Downlink D/VD Data/Voice Data DA Distribution Assembly DA Double AmPlitude DA Data Acquisition DA Deployment Assembly DA Distribution assembly DA Deployed assembly DA&D Data Acquisition and Distribution DAB Data Acquisition Bus DABS Discrete Address Beacon SYstem DAC Data Acquisition and Control DAC Data Acquisition Camera DAC Digital to Analog Converter DAC Digital to AnalYtical Conversion DACB Data Acquisition and Control Buffer DACBU Data Acquisition and Control Buffer Unit DACS Digital Acquisition and Control System DACS Data Acquisition and Control System DACT DisPosable Absorption Collection Trunk DADE Data Acquisition and Decommutation EquiPment DADS Dual Air Density Satellite DAE Data Acquisition EquiPment DAF Data Acquisition Facility DAF Data Analysis Facility DAFT Data Acquisition Frequency Table DAIS Data Avionics Information System DAL Data Acquisition List DAL Data Accession List DAL Data Aided Loop DAM Double Aluminized Mylar DAM Driver Amplifier Module DAP Data Acquisition Plan DAP Digital Autopilot DAP Digital autopilot DAR Data Aided Receiver DAR Digital Autopilot Requirements DAR Deviation Approval Request DAR Drawing Analysis Record DARS Data Acquisition and Reduction System DARTS Digital Automated Radar Tracking System DAS Documentation Accountability Sheet DAS Digital Avionics System DAS Digital Address System DAS Data Analysis Station DAS Data Acquisition System DASA Dual Aerosurface Servo Amplifier DATE "Dynamics, Acoustics, and Thermal Environment" DAU Digital Adapter Unit DAU Data Acquisition Unit DAV Data Available DAV L Data Available-Low DB Deadband DB Data Base DB Data Bus DB Dry Bulb DB Distribution Box DB Design Baseline DBC Data Bus Coupler DBC Data Bus Control DBC Data bus coupler DBCI DB with Respect to a Circular Polarized Antenna DBE Data Bus Element DBFN Data Bus File Number DBFN Data Base File Number DBFN DBG Data Bus Group DBGMP DBL Double DBGMP Data Bus Generation and Maintenance Package DBGMP Data Bus Isolation Amplifier DBGMP DBIA Data Bus Interface Adapter DBGMP DBI Data Bus Interface Unit-Launch DBGMP DBIU Data Bus Interface Unit DBGMP DBS Data Base System DBGMP dBM Decibels Referred to I Milliwatt DBGMP DBN Data Bus Network DBGMP DBP Design Baseline Program DBGMP DBRN Data Bank Release Notice DBGMP DBM Data Base Management DBGMP dBW Decibels Referred to I Watt DBGMP DBW Data Bus Wire DBGMP DBUR Data Bank Update Request DBIA Data bus isolation amplifier DBN Data bus network DC DeveloPment-Center DC Data Coordinator DC Display Coupler DCC Data ComPutation Complex DCC Display COMPuter Control Unit DCC Document Control Center DCC Digital Communications and Control Unit DCC DCCU Digital Command and Control Unit DCC Data computation complex (JSC) DCIB Data Communication InPut Buffer DCIM/DSCIM Display SYstem Computer Input Multiplexer DCIU Digital Control and Interface Unit DCKNG Docking DCL Document Change List DCM Direction Cosine Matrix DCM DECOM Control Memory DCM Display and Control Module DCM Display and control module DCMB Development Configuration Management Board DCN Design Change Notice DCN Document Change Notice DCN Drawing Change Notice DCNP Document Change Notice Proposal DCO Detailed Checkout DCOP Detailed Checkout Procedures DCOP "Displays, Controls, and Operations Procedures" DCP Data Collection Platform DCP Depot Condemnation Percent DCP DEU Control Program DCP Development Cost Plan DCPEI DEU Control Program End Item DCR Design Change Request DCR Design Certification Review DCR Document Change Record (or Review) DCR Design Concern Report DCS Data Communication System DCS Design Criteria Specification DCS Design Communication System DCS Detail Checkout Specification(s) DCS Digital Command System (Subsystem) DCS Display and Control System DCS Document Control System DCS Dual Checkout Station DCS Data Control System DCSI Data and Cqntrol Signal Interface DCSP Digital Control Signal Processor DCSU Digital Computer Switching Unit DCU Digital Computer Unit DCU Display and Control Unit DCV Direct Current Volts DD Data Depository DD Mechanical and Facilities Engineering (KSC DE Dir.) DD Directives Documentation DD Dedicated Displays DD Data Display DD Decoder Driver DD&CS Dedicated Display and Control Subsystem DD/HH:MM:SS Day/Hour:Minute:Second DDA Digital Differential Analyzer DDA ICD Departure Authorization DDAS Digital Data Acquisition System DDC Defense Documentation Center DDC Data Distribution Center DDC Digital Data Cell DDD Display Decoder Drive DDD Design Definition Document DDDL Digital Data Downlink DDDU Digital Decoder Driver Unit DDI Dedicated Display Indicator DDI Discrete Data input DDI Discrete Digital Input DDIS Data Depository Index System DDL Data Downlink DDM Data Display Module DDM Data Display Monitoring DDM Discrete Data Management DDMS DOD Manager for Space Shuttle Support DDO Discrete Digital Output DDP Design Development Plan DDP Digital Data Processing (Processor) DDPC Digital Data Processing Center (Complex) DDPF Dedicated Display Processing Function DDPS Digital Data Processing System DDR Data Discrepancy Report DDR Design Development Record DDR Detail Design Review DDS Documentation Distribution System DDS Data Display System DDS Detailed Design Specification DDT&E "Design, Development, Test, and Engineering/Evaluatio" DDT&E "Design, Development, Test, and Evaluation" DDT&E "Design, development, test and evaluation" DDTF Dynamic Docking Test Facility DDTS Dynamic Docking Test System DDU Decommutator Distribution Unit DDU Data Display Unit DDU Display Driver Unit DDU Display driver unit DE Design Engineering (KSC Dir.) DE Doppler Extractor DE Dynamics Explorer DEA Deployed electronics assembly DEACT Deactivate DEC Declination DECL Direct Energy Conversion Laboratory (JSC) DECOM "Decommutate, Decommutator" DECR Decrease DECS Civil Engineering Office at Vandenberg DECU Data Exchange Control Unit DED "Dedicate, Dedicated" DEDA Data Entry and Display Assembly DEE Digital Events Evaluator DEF Definition DEFL Deflect DEG Degree DEI Design Engineering Identification DEIS Design Engineering Inspection Simulation DEIS Design Evaluation Inspection Simulator DEL "Deliver, Delivery" DEL "Deorbit, Entry, and Landing" DELTA-T Difference in Temperature DEMOD "Demodulate, Demodulator" DEMUX Demultiplexer DEORB Deorbit DEPL Deploy DEPRESS Depressurize DEPT Department DER Drawing Error Report DERIGID Derigidize DES Data Exchange System DES "Descend, Descent" DESAT Desaturated DESC Descent DESIG Designate DESPOT Design Performance OPtimization DEST Destination DET Detent DET Detail DETN Detection DETR Detector DEU Display Electronic(s) Unit DEU Display electronics unit DEV "Develop, Development" DEVN Deviation DEW Distant Early Warning DF Direction Finder (Finding) DF Disassembly Facility DF Development-Forward DF Development Flight DF Display Functions DF-SPE-A Shuttle Project Engineering Office DFCS Digital Flight Control Software (System) DFE Data Flow Engineer DFE Direction Finding Equipment DFG Display Format Generator DFI Development Flight Instrumentation DFI Development flight instrumentation DFR Defrost DFRC Hugh L. Dryden Flight Research Center DFRF Dryden Flight Research Facility DFRN Differential DFRN PRESS Differential Pressure DFS Directional Finding System DFS Dynamic Flight Simulator DFVLR Deutsche Forschungs-und Versuchsanstalt Luft-u DG Display Generator DH Decision Height DHA Design Hazards Analysis DHE Data-handling equipment DHS Discrete Horizon Sensor DI Display Interface Processor (Software Functional Element) DI Display Interface DI Discrete Input DI Development Integration DI Data Integrator DIA Diameter DIAG Diagonal DIAGN Diagnose DIDS Defense Integrated Data System DIF Discrete Increment Filter DIF Difference DIFF Differential DIGI Digital DIH Discrate Input High DIH Discrete Input High DIL Deliverable Items List DIL Discrete Input Low DIM Design Interface Meeting DIMEN Dimension DIP Designated Inspection Point DIP Display Input Processor DIP Display Interface Processing (Processor) DIPEC Defense Industrial Plant Equipment Center DIPL Display Initial Program Load DIR Direct DIR Document Information Record DIS Documentation Index System DIS Disagree DISAP Disapproved DISASSY Disassembly DISC Discone DISC Disconnect DISC Discrete DISCH Discharge DISENG Disengage DISP Dispenser DISP Display DIST Distribution DISTR DIU Dynamic Integrated Test DISTR Digital Interface Unit DISTR DIV Division DISTR DIT Data ld Table DISTR Distributor DK Docking DK DisplaY/Keyboard DK Deck DK Display keyboard DL Downlink DL DeveloPment-Left DL Electronics Engineering (KSC DE Dir.) DLAT Destructive Lot AccePtance Testing DLC Direct Lift Control DLS Dynamic Load Simulator DLY Delay DM Docking Mechanism DM "Document, Documentation" DM Disassembly Manual DM DeveloPmental Instrumentation MDM.Mid DM DeveloPment Motor DM Data Manager DMA Direct MemorY Access DMA Direct MemorY Address DMC Drive Motor Assembly DMC Direct Maintenance Cost DMC Data Management ComPuter DMCF "Deservicing, Ma ntenan" DME Distance Measur ng EquiPment DME Distance-measuring equipment DMG Data Management Group DMIA Dual Multiplexer Interface Adapter DMIS Data Management Information System DML Developmental Instrumentation MDM-Left DMON Discrete Monitoring DMP Dump DMP DEU Message Processor DMP Deployable Maintenance Platform DMR Developmental Instrumentation MDM-Right DMS Data Management System DMS Docking Mechanism System (Subsystem) DMS Docking Module Subsystem DMS Dynamic Motion Simulator DMSS Data Management System Simulator (CVT) DN Down DN Discrepancy Notice DNA Does Not Apply DNLK Downlink (D/L preferred) DNLT Downlist DNO Descending Node Orbit DNP Dynamic Nuclear Polarization DO Discrete Output DOA DePartment of Agriculture DOC Department of Commerce DOC "Document, Documentation" DOD Department of Defense DOD Department of Defense DOD-STP Department of Defense-Standard Satellite DODD Department of Defense Directive DOE Department of Energy DOF Direction of Flight DOF Degree-of-Freedom DOH Discrete Output High DOI Descent Orbit Insertion DOL Department of Labor DOL Discrete Output Low DOMSAT Domestic Satellite DOMSAT Domestic satellite DOP Diver Operated Plug DOS Disk Operating System DOSIM Dosimeter DOT Department of Transportation DOT Deployment Operations Team DOT/CIAP DOT Climatic impact Assessment Program DOY Day of Year DP Double Precision DP Differential Pressure DP Development Phase DP Data Processing DP Double Pole DP Design Proof DP Deployable Payload DP Delayed Procurement DP&S Data Processi.ng And Software DP&SS Data Processing and Software Subsystem DP/DT Delta Pressure/Delta Time DPA Data Processing Assembly DPA Data processing assembly DPI Detail Program Interrelationships DPLR DOPPler DPM Dual port Memory DPN L Distribution Panel DPP Definition Phase Review DPP E)eve@opment-Right DPP Design Review DPP "Discrete Registe," DPP Dispatch BeliabilitY DPP D'isposit'lon Record DPP Data Processing and Software DPP Deployment Pointing Panels DPP Door DPP Discrepancy R12POrt DPP Data Processing System (Subsystern) DPP Data Processing Software System DPP Data Requirements and AnalYsis DPP Drive DPS Data processing system DPT Design Proof Test DPY Deploy DR Dead Reckoning DRA Data Release Authorization DRB Design Review Board DRB Design Requirements Baseline DRC Data Reduction Center DRC Discrete Rate Command DRD Document Requirement Description DRD Data Requirement Description DRD Detailed Requirements Document DRD Data Requirements Document DRF Data Request Form DRF "Digital, Radio Frequency" DRF Documentation Requisition Form DRG Digital Ranging Generator DRI Data Rate Indicator DRIRU Dry Rotor Inertial Reference Unit DRK Display Request Keyboard DRL Data Requirements List DRL Document Requirements List DRM Data Records Management DRM Design Reference Mission DRM Drawing Requirements Manual DRN Drain DRO Document Release Order DROG Drogue DRR Design Requirements Review DRR Data Recorder/Reproducer DRS Digital Range Safety DRS Data Relay Satellite DRS Data Relay Station DRSS Discrepancy Report Squawk Sheet DRT Design Reference Timeline DRUC Disposition Record Unsatisfactory Condition DS Data Storage DS& R Data Storage and Retrieval DSA Defense Supply Agency DSAD Data Systems and Analysis Directorate (JSC) DSB Document Status Bulletin DSB Double Side Band DSC Data Separator Card DSC Dedicated signal conditioner DSN Deep-Space Network DTP Detail Test Plan DTPR Detailed Test Procedures DTRD Development Test Requirements Document DTS Data Transmission System DTS Data Transfer System DU Display Unit DU Display unit DUA Digital Uplink Assembly DUC Digital Uplink Command DUM Dummy DUPLX Duplex DUPLXR Duplexer DUR Duration DV Designated Verification DV Differential Velocity DV Designee for Verification DVD Delta Velocity Display DVM Digital Voltmeter DVS Design Verification Specification DVS Digital Voice System DVT Design Verification Testing DW Data Word DWG Drawing DWI Data Word in DWS Disaster Warning Satellite DWV Dielectric Withstanding Voltage DY Deputy Director (KSC Directorate) DYN Dynamic [E] E East E LACS Extended Life Attitude Control System E LSC Earth Landing Sequence Controller E LSS Emergency Life Support System E&D Engineering and Development E&D Engineering and DeveloPment Directorate (JSC) E-E End-to-End E-MUX Electrical Multiplex E-P Electron/Proton E/0-ims E/0-Information Management System E/C Encoder/Coupler E/L Entry/Landing E/M Engineering Model E/O Engineering/Operations E/W Energy to Weight Ratio E/W Energy Over Weight EA Electronic Assembly EA Each EA Elevation Angle EAC Energy Absorbing Capacity EAC Estimate at Completion EAD ElectricallY Alterable Device EADI Electronic Attitude Director Indicator EAFB Ellington Air Force Base EAFB Elgin Air Force Base EAFB Edwards Air Force Base EAFB Edwards Air Force Base EAM Electrical Accounting Machine EAR Engineering AnalYsis Report EAS Equivalent Air Speed EAS Equivalent airspeed EAT Environmental Acceptance Test EB Emergency Box EB Electronic Beam EBC Emulated Buffer COMPuter EBCDC Extended Binary Coded Decimal EBD Eyeballs Down (+GZ) EBI Eyeballs in (+GX) EBL Eyeballs Left (+GY) EBO Eyeballs Out (-GX) EBR Eyeballs Right (-GY) EBS Emergency Breathing Subsystem EBU Eyeballs Up (-GZ) EBW Exploding Bridge Wire EBW Electron Beam Welding EC Element Contractor EC Engine Control EC Engine Cutoff EC Events Coupler EC Essentiality Code EC Experiment Computer EC Events Controller ECA Engineering Change Analysis ECA Electronics Control Assembly ECA Epoxy Curing Agent ECAS Experiment Computer Application Software ECB Engineering Change Board ECB Event Control Block ECB Events Control Buffer ECC Engineering Critical Component ECC Engineering Change Control ECCB Engineering Change Control Board ECD Engineering Control Drawing ECD Estimated Completion Date ECEP Experiment Checkout Equipment Processor ECF Equivalency Capability File ECF Element Charge Factor ECG Electrocardiogram ECG Electrocardiograph ECI Earth Centered Inertia (inertials) ECIO Experiment Computer Input/Output ECL Entry Closed Loop ECLS Environmental Control and Life Support ECLSS Environmental Control and Life Support System ECLSS Environmental control and life support system ECN Engineering Change Notice ECO Engine Cutoff ECO Engine Combustion ECO Engineering Change Order ECOS Experiment Computer Operating System ECP Explicitly Coded Program ECP Engineering Change Proposal ECP Engineering Control Proposal ECP Engineering Change Program ECR Engineering Change Request ECRA Engineering Change Request/Authorization ECS Environmental Control System (Subsystem) ECS Engine Control SYstem ECU Environmental Control Unit ECU Electronic Coupling Unit ECU Electrical control unit ED Explosive Device ED Edge Distance ED Engineering Directive ED Edit EDA Elevation Drive Assembly EDA Electronic DisPlay Assembly EDB Environmental Data Book EDC Engineering Design Change EDC(M) Electrochemical DePolarized CO (Module) EDCP Engineering Design Change ProPosal EDDR Electron DiPole-DiPole Reservoir EDF Engineering Data File EDLN Engineering DeveloPment Logic Network EDP Electonic Data Processing EDPE Electronic Data Processing EquiPment EDPM Electronic Data Processing Machine EDR Engineering Design Review EDS Emergency Detection System EDS Electrical Distribution System EDT Explosive Device System EDT Eastern Daylight Time EDU Engineering DeveloPment Unit EDV Electronic Depressurizing Valve EDW Edwards (TACAN Station) EDW "Edwards Air Force Base, CA (Deorb OPT site)" EE End Effector EECOM "EleCtrical, Environmental, and Communications" EECOM "Electrical, Environmental, Consumables, and Mechanical" EECOM Systems (MPSR) EED Electro (Electrical) Explosive Device EED Electroexplosive device EEE "Electronic, Electrical, Electromechanical" EEEU End Effector Electronics Unit EEG Electroencephalogram EEH EMU Electrical Harness EEIS End-to-End Information System EEL Electrical Equipment List EEM Earth Entry Module EENT "Eye, Ear, Nose, and Throat" EERD Enhanced Entity Relationship Diagram EES Emei@gency Ejection Suits EES Ejection Escape Suit EES Escape ejection suit EET Entry Elapsed Time EETB Electronic Electrical Termination Building EEVT Electrophoresis Equipment Verification Test EFA Experiment Flight Applications EFCS Earth Fixed Coordinate System EFF Efficiency EFFGRO Efficient Growth (Computer Program) EFP ESA Furnished Property EFTO Encrypted for Transmission Only EG Entry Guidance EGA Evolved Gas Analysis EGC Experiments Ground Computer EGF "Electrical, Grapple Fixture" EGIL "Electrical, General Instrumentation, and Lighting E" EGRET Energetic Gamma Ray Explorer Telescope EGRS Egress EGSE Electrical Ground Support Equipment EGT Elapsed Ground Time EGT Estimated Ground Time EGT Exhaust Gas Temperature EGUN Fast Pulse Electron Gun EH/M Extension Hose/Moi!thpiece EHC Electrical Heating Control EHF Extremely High Frequency EHOT External Hydrogen/Oxygen Tank EHP Effective Horsepower EHP Electrical Horsepower EHR Earned Hour Ratio EHS Environmental Health Services EHX Experiment Dedicated Heat Exchanger EI Entry interface EIA Electrical Industries Association EIASN End Item Assembly Sequence Number EIC Experimental Intercom EID End Item Documentation EIDP End Item Data Package EIFA Element Interface Functional Analysis EIR Environmental Impact Report EIRP Effective lsotropic Radiated Power EIS Electrical Integration SYstem EIS Environmental Impact Statement EIS End Item Specification EIS Extended Instruction Set EIT Entry Interface Time EIU Engine Interface Unit EIU Engine interface unit EIVT Electrical and Instrumentation Verification Test EIVT Electrical Interface Verification Test EIVT Electronic Installation Verification Test EJN Ejection EKG Electrocardiogram (Record) EKG Electrocardiograph (Instrument) EL Elastic Limit EL Elevation Angle EL Elevate EL Electroluminescent EL MECH Electromechanical ELB Elbow ELDISC Electrical Disconnect ELDV Electrically Operated Depressurization Valve ELEC Electronic ELEC Electric ELECT Electrical ELECTR Electronics ELEV Elevon ELF Extremely Low Frequency (1 Hz to 3 kHz) ELINT Electromagnetic Intelligence ELMCH Electromechanical ELMS Elements ELMS Elastic Loop Mobility System ELS Earth Landing System (Subsystem) ELS Eastern Launch Site ELS Elevon Load System ELT Emergency Locator Transmitter ELV Earth Launch Vehicle ELV Electrically Operated Valve ELV Expendable Launch Vehicle ELVN Eleven EM Exception Monitor EM Emergency EM Engineering Model EMA Electromagnetic Analysis EMC Electromagnetic Compatibility EMCC Emergency Mission Control Center EMCD Electro-Mechanical Control Diagram EMCI Engineering Model Configuration Inspection EMD Entry Monitor Display EMEC Electromagnetic Effects Capability EMEC Electromagnetic Effects Compatibility EMER Emergency EMES "Electriral, Mechanical, and Environmental Systems" EMF Electromagnetic Force EMF Electromotive Force EMG Electromyograph(gram) EMG Surface Electromyograms EMI Electromagnetic Interference EMIS Emission EMK Emergency Medical Kit EMK Emergency medical kit EML Electromagnetic Laboratory EMN Engineering Management Network EMON Exception Monitoring EMP Electromagnetic Pulse EMP EquiPment Mounting Plate EMPGS Electrical/Mechanical Power Generation SubsYstem EMR Engine Mixture Ratio EMRL Equipment Maintenance Requirements List EMS Entry Monitor Subsystem EMS Engineering Master Schedule EMS Entry Monitoring system EMS Electromagnetic Susceptibility EMSS Electromagnetic Servoactuator SYstem EMT Electro-Mechanical Test EMU Extravehicular Mobility Unit EMU Engineering Model Unit EMU Extended Memory Unit EMU Extravehicular mobility unit EMU-TV Extravehicular MobilitY Unit - Television ENA Enable ENC Encode ENCD Encode ENCL Enclose END EFF End Effector ENDF Evaluated Neutron Data File ENG "Engine, Engineer" ENG ElectronYstagnogram ENGR Engineer ENGRG Engineering ENT Entry ENVIR "Environment, Environmental" EO Earth Orbit EO Earth Observation EOC End of Contract EOC Engine Order Capability EOC Engine-out Capability EOD Estimated on Dock EOD Explosive Ordnance Disposal EODB End of Data Block EOF End of File EOG Electroculogram EOHT External Oxygen and Hydrogen Tanks EOI Earth Orbit Insertion EOL End of Line EOM Equations of Motion EOM Engineering Operations Manual EOM End of Mission EOM End of Message EOMF End of Minor Frame EOP Emergency Oxygen Pack EOP Experiments of Opportunity EOP Earth and Ocean Physics EOPAP Earth and Ocean Physics Application Program EOPO Equal Opportunity Program Office EOR Earth Orbit Rendezvous EOS Earth Orbit Shuttle EOS Emergency Oxygen Supply EOS Emergency Oxygen System EOS Extended Operating System EOS Earth Observation Satellite EOT End of Tape EOT End of Transmission EOW Energy over Weight EP Elbow Pitch EP Environmental Protective Plan EP Electrical Power EPA Environmental Protection Agency EPC Error Protection Code EPC External Power Contractor EPCDC "Electrical Power Conditioning, Distribution, and" EPCDC Control EPD Emergency Procedures Document EPD Electrical Power Distribution EPDB Electrical Power Distribution Box EPDB Experiment Power Distribution Box EPDC Electrical Power Distribution and Control EPDCS Electrical Power Distribution and Control System EPDS Electrical Power and Distribution Subsystem EPDS Electrical Power Distribution System EPDS Electrical power distribution subsystem EPDU Electrical power distribution unit EPG Electrical Power Generator EPL Electrical Power Level EPL "Electronic, Electrical, and Electromechanical Parts" EPL List EPL Emergency Power Level EPMS Engineering Performance Management System EPO Element Project Office EPOC External Payload Operations Center EPPS Electrical Power/Pyro Sequential System EPR Engine Pressure Ratio EPRN Emergency Program Release Notice EPROM Erasable Programmable Read Only Memory EPS Electrical Power System (Subsystem) EPS ExPerimental Power Supply EPS Electrical power system EPSP Experiment Power Switching Panel EPT Emergency Procedure Trainer EPT Ethylene Propylene Terpolymer EPTU Events per Time Unit EPWG Environmental Projects Working Group EQ Equivalent EQE Event Queue Element EQL Equal EQUIP Equipment EQUIV Equivalent ER Explanation Report ERA Electrical Replaceable Assembly ERAP Earth Resources Aircraft Program ERB Engineering Review Board ERBE Earth Radiation Budget Experiment ERBS Earth Radiation Budget Satellite ERC Event Recorder ERCA Electrochemically Regenerable CO2Absorber ERD Entity Relationship Diagram EREP Earth Resources Package ERG Ergometer ERNO "of European Consortium, VFW-Fokker-Mannheim," ERNO Germany (SPacelab Contractor) ERO Engineering Release Operations ERP Effected Radiative Power ERP Eye Reference Point ERP Effective Radiation Power ERPM Engineering Requirements and Procedures Manual ERR Error ERR CNTR Error Counter ERRC Expendability/Recoverability/Repair Capability ERS Engineering Release System ERS Entry and Recovery Simulation ERS Earth Recovery Subsystem ERSI Elastomeric Reusable Surface insulation ERSIR Earth Resources Shuttle Imaging Radar ERTS Earth Resources Technology Satellite ERU Earth Rate Unit ERV Expiratory Reserve Volume ES Experiment Segment ES Escape System ESA Engineering SuPPly Area ESA Engineering SuPPort Assembly ESA European Space Agency ESA ExPlosive Safe Area ESA European Space Agency ESA Explosive safe area (KSC) ESB Essential Switching Box ESC Escape ESCA Electron Spectroscopy for Chemical Analysis ESCU Extended Service and Cooling Umbilical ESD Experiment Systems Division ESD Emergency Shutdown ESDAC "European Space Data Center (Darmstadt, Germany)" ESDU Event Storage and Distribution Unit ESE Electrical Support Equipment ESE Electronic SuPport Equipment ESE EVA Support Equipment ESF Explosive Safe Facility ESI Electrical System Integration ESMC ETR ESMC "Eastern Space and Missile Center (formerly AFETR), also" ESO Event Sequence Override ESOC European Space Operations Center ESOW Engineering Statement of Work ESP Engine Service Platforms ESP Experiment Sensing Platform ESP Electroshock Protection ESPS Experiment Segment Pallet Simulator ESR Effective Sunrise ESR Engineering Support Request ESRIN European Space Research Institute ESRO European Space Research Organization ESRO European Space Research Organization ESS Environmental Support System ESS Essential ESS Experiment Subsystem Simulator ESS Effective Sunset ESS Equipment support section ESS Essential ESSA Environmental Sciences Services Administration EST Eastern Standard Time EST Estimate(d) ESTA Electronic System Test Equipment ESTA Escape System Test Article ESTEC European Space Research and Technology Center ESTEC European Space Technology Center ESTL Electronic Systems Test Laboratory ESV Emergency Shutoff Valve ESVS Escape System Ventilation System ESVS Escape Suit Ventilation System ESVS Escape suit ventilation system ESW Engine Status Word ET Edge Thickness ET Elevated Temperature ET Event Timer ET External Tank ET Elapsed Time ET External tank ET-SEP External Tank Separation ETA Environmental Test Article ETA Estimated Time of Arrival ETA Estimated Time to Acquisition ETA Explosive Transfer Assembly ETA External Tank Attachment ETB Equipment Transfer Bag ETC Estimate to Completion ETC "Greenbelt, Maryland (STDN Site)" ETC Earth Terrain Camera ETCO Equipment Transfer/Change Order ETD Electrical Terminal Distributor ETD Estimated Turnover Date ETD External Tank Door ETE End-to-End ETI Elapsed Time Indicator ETLOW External Tank Lift-Off Weight ETM ElaPsed Time Meter ETP Equipment Test Plan ETR Eastern Test Range (ESME preferred) ETR Eastern test range ETROD Eastern Test Range Operations Directive ETS Energy Transfer System ETS External Tank System (Subsystem) ETS Electrical Test Set ETSS External Tank Separation Subsystem ETVA External Tank Vent Arm EU Electronic Unit EU Engineering Units EU Experimental Unit EUROCOMSATE European Consortium Communications Satellite EUV Extreme Ultraviolet EUVE Extreme Ultraviolet Explorer EV Electron Volts EV Expendable Vehicles EV Extravehicular EVA Earned Value Analysis EVA Extravehicular Activity EVA Extravehicular activity EVAL Earth Viewing Applications Laboratory EVAL "Evaluate, Evaluation" EVAP Evaporator EVATA Extravehicular Activity Translational Aid EVC Extravehicular Communications EVCON Events Control (Subsystem) EVCS Extravehicular Communications System EVCU Extravehicular Communications Umbilical EVD External Visual Display EVF Equipment Visibility File EVLSS Extravehicular Life Support System EVM Earth Viewing Module EVMU Extra Vehicular Mobility Unit EVO Engineering Verification Order EVS Equipment VisibilitY System EVS Extravehicular Suit EVSC Extravehicular Suit Communications EVSS Extravehicular Space Suit EVSU Extravehicular Space Unit EVT Engineering Verification Test EVT Extravehicular Transfer EVVA Extravehicular Visor Assembly EWA Estimated Warehouse Arrival EWE Emergency Window Escape EWO Engineering Work Order EWR Engineering Work Request EX Executive Management Office (KSC Directorate) EXC Experiment Computer EXCH Exchange EXEC Execute EXH Exhaust EXO Experiment Operator (in Spacelab) EXP Exposure EXP Expand EXP Experiment EXPEN Expendable EXT Experiment Terminal (Operator Console on Spacelab) EXT Extension EXT External EXTD Extend EXTER External EXTGH Extinguish El End Item El Engineering Instruction El Entry Interface El Environmental Impact El Electronic Interface El Electromagnetic Interference [F] F Forward F Fahrenheit F Failure F Farad (SI Unit of Capacitance) F Female F Front F LCA Forward Load Control Assembly F&E Facility and Envii-onment F/0 Fuel/Oxidizer Ratio F/A Failure Analysis F/A Fuel-Air F/C Fit Check F/C Flight Controller F/C Fuel Cells F/D Fill/Drain F/E Full/Empty F/F "Fill/Full, Full/Fill" F/R Flared Rudder FA Failure Analysis FA Final Approach FA Final Assembly FA Flight Aft FA Flight Critical Aft FA Fully Automatic FA Flight aft FA/COSI Final Assembly and Closeout System Installation FAA False Alarm Avoidance FAA Federal Aviation Administration FAA Federal Aviation Agency FAB "Fabricate, Fabrication" FAC Facility FACI First Article Configuration Inspection FACO Fabrication and Acceptance Checkout FACO Factory Acceptance Checkout FACO Factory Assembly and Checkout FACO Final Assembly Checkout FACS Facilities Control FACS Finance and Control System FACT Flexible Automatic Circuit Tester FAD Final Approach Display FAF First Aerodynamic Flight FAIR "Fabrication, Assenibly, and Inspection Record" FAL First Approach and Landing (Test) FAM Familiarization FAMOS Flight Acceleration Monitor Only System FAO Flight Activities Officer FAP Final Approach Plane FAR Failure Analysis Report FAR Federal Aviation Regulation FAR Final Acceptance Review FAR Flight Acceptance Review FASCOS Flight Acceleration Safety Cutoff System FAT Flight Attitude Table FAWG Flight Assignment Working Group FAX Facsimile Transmission FB Feedback FB Final Braking FBAS Fixed Base Aft Station FBC Fluidized-Bed Combustion FBCS Fixed Base Crew Station (SMS) FBS Firefighters Breathing System FBV Field Base Visit FBV Fuel Bleed Valve FC Fit Check FC Flight Computer FC Flight Control FC Flight Critical FC Fuel Cell FC Flight control FC Flight critical FC Fuel cell FCA Fluids Control Assembly FCA Frequency Control Analysis FCA Functional ComPatibility Analysis FCA Functional Configuration Audit FCA Forward controller assembly FCAF Flight Crew Accommodations Facility FCAP Flight Control Applications Program FCC Federal Communications Commission FCC Flat Conductor Cable FCC Flight Control Computer FCC Flight Crew Compartment FCCP Firm Contract Cost ProPosal FCD Flight Control Division (JSC) FCDB Flight Control Data Bus FCE Flight Control Equipment FCE Flight Crew Equipment FCEF Flight Crew Equipment Facility FCEI Facility Contractor End Item FCF First Captive Flight FCF Flight Critical Forward FCF Functional Check Flight FCFM Flight Combustion Facility Monitor FCH Flight Controllers Handbook FCH L Flight Control Hydraulics Laboratory FCI Flight Control Indicator FCI Functional Configuration Identification FCIM Flight Control Interface Module FCIP Flight Cargo Implementation Plan FCIT First Computer Interface Tester FCL Freon Coolant Loop FCL Freon Coolant Line FCL Freon coolant loop FCMU Foot Controlled Maneuvering Unit FCN Function FCO Final Checkout FCO Functional Checkout FCOH Flight Controllers Operational Handbook FCOS Flight Computer Operating System (Orbiter) FCOS Flight Control Operational Software FCOS Flight Control Operating System FCOS Flight control operational software FCOS Flight computer operating system FCP Firm Cost Proposal FCP Failure Correction Panel FCP Fuel Cell Power (Plant) FCP Flight Correction Proposal FCP Fuel cell power plant FCPS Fuel Cell Power System (Subsystem) FCR Final Configuration Review FCR Flight Configuration Review FCR Flight Control Room FCR Flight Control Room FCRA Fecal Collection Receptacle Assembly FCRT Flight Display CRT FCS Fecal Containment System FCS Flight Control System (Subsystem) FCS Flight Crew System FCS Federal Communications System FCS Flight control system FCSM Flight Combustion Stability Monitor FCSS Fuel Cell Servicing System FCT Flight Control Team FCT Fuel Cell Test FCT Flight Crew Trainer FCTB Flight Crew Training Building FCTF Fuel Cell Test Facility FCTS Flight Crew Trainer Simulator FCU Fluid Checkout Unit FCW Format Control Words FD Fault Detection FD Flight Day FD Flight Deck FD Flight Director FD Freeze Dried FD Feed FD FunCtion Designator FD WMR Food Warmer FDA Fault Detection and Annunciation FDA Flight Deck Assembly (FDF) FDAI Flight Director Attitude Indicator FDB Fahrenheit Dry Bulb FDDB Function Designator Data Base FDF Flight Data File FDF Flight data file FDI Fault Detection and Identification FDI Fault Detection and Isolation FDI Failure Detector Indicator FDIIR Recompensation FDIIR "FaLilt Detection, Isolation, Identification, and" FDIR Recovery/Recognition FDIR Fault Detection identification/Isolation and FDL Flight Director Loop FDLN Feedline FDM Flight Data Manager FDM Frequency Data Multiplexer FDM Frequency Division Multiplexing FDM Frequency division multiplexer FDO Flight Dynamics Officer FDO Fee Determination Official FDOR Flight Design Operations Review FDR Final Design Review FDR Flight Data Recorder FDR Functional Design Review FDRI Flight Director Rate Indicator FDS Flight Design System FDS Flight Dynamics Simulator FDS Flight Dynamics Software/System FDS Fluid Distribution System FDS Functional Design Specifications FDS Flight Design and Scheduling FDSC Flight Dynamics Situation Complex FDSC Flight Dynamics Simulation Complex FDU Fluid Distribution Unit FDX Full Duplex FEA Failure Effects Analysis FEAT Final Engineering Acceptance Test FEB Forward Equipment Bay FEC Field Engineering Change FEC Forward Events Controller FED Flight Events Demonstration FEDP Facility and Equipment Design Plan FEID Flight Equipment Interface Device FEID Functional Engineering Interface Device FEM Finite Element Method FEMCPL Facilities and Envir- Measurement Comp. Parts List FEP Floral Ethel Propane FEP Fluorinated Ethylene Propylene FEP Front End Processor FERD Facility and Equipment Requirements Document FES Flight Element Set FES Flash Evaporator System FES Flash evaporator system FESL Failure Effects Summary List FET Field Effect Transistor FET Flight Elapsed Time FEWG Flight Evaluation Working Group FF Flip Flop FF Free Flight FF Flight Forward FF Flight forward FFBD Functional Flow Block Diagram FFC Final Flight Certification FFD Fixed Format Display FFD Functional Flow Diagram FFM Free-Flying (Experiment) Module FFP Firmed Fixed Price FFTO Free-Flying Teleoperator FH Flex Hose FHC Flight Half Coupling FHD Fixed Head Disk FHF First Horizontal Flight FHO Failed Handover FHP Fuel High Pressure FHS Forward Heat Shield FI Flight Instrumentation FI Formal Inspection FIAR Failure Investigation Action Report FID Failure Identification FID Flight Implementation Directive FIDO Flight Dynamics Officer FIE Flight Instrumentation Engineer FIFO First in-First out (High Speed Data Buffers) FIG Figure FIIG Federal Item Identification Guide FIL Filament FILE Future Identification and Location Experiment FIO Furnished and installed by Others FIR Fuel Indicating Reading FIS Facility Interface Sheets FIT Fault Isolation Test FITH Fire-in-the-Hole FIV Fuel Isolation Valve FKB Flight Display Keyboard FL Fail FL Feed Lines FL Flowline FL Forward link FL MECH Fluid Mechanical FLAP Flight Application Software FLC Federal Library Committee FLC Forward Load Control FLCA Forward load controller assembly FLD Field FLEX Flexible FLG Flag FLG Flange FLLK Frustum Lifting Lug Kit FLN Fuel Line FLOT Flotation FLP Flap FLPS Flight Load Preparation System FLR Flare FLR Failure FLS Flight Surgeon FLSC Flexible Linear Shaped Charge FLT Flight FLT Floating FLTR Filter FLTSATCOM Fleet Satellite Communications FLUOR Fluorescent FLW Fellows (TACAN Station) FM Frequency Modulation (Modulated) FM Flight Model FM "Frequency modulation, frequency modulated" FM/FM Frequency Modulation/Frequency Multiplexing FM/PM Frequency Modulation/Phase Modulation FMA Failure Mode Analysis FMAHTS Flight Manifest and Hardware Tracking System FMANTS Flight Manifest FMC Food Machinery Corporation FMCF First Manned Captive Flight FMDM Flex Multiplexer/Demultiplexer FMEA Failure Modes and Effects Analysis FMEC Forward Master Events Controller FMECA "Failure Mode, Effects, and Criticality Analysis" FML Fault Message Line FML Final Materials List FMO Flight Medical Officer FMOF First Manned Orbital Flight FMOFEV First Manned Orbital Flight with EVA FMOFPL First Manned Orbital Flight with Payload FMR Field Modification Request FMR Function Max Rate FMS Food Management System (Subsystem) FMSP Frequency Modulation Signal Processor FMSP FM signal processor FMT Flight Management Team FMX FM Transmitter FND Facility Need Date FNL Final FNT Failure Notification Telex FO Objective FO Fail Operational FO Fiber Optics FO/FS Fail-Operational/Fail-Safe FOB Flight Operations Building FOB Free on Board FOC Focus FOC Full Operational Capability FOD Flight Operations Directorate (JSC) FOE Flight Operations Engineer FOF First Orbital Flight FOF First Operational Flight FOF Flight Operations Facilities FOIH Flight Operations Integration Handbook FOM R Flight Operations management Room FOP Flight Operations Plan FOP Flight Operations Panel FOP Follow on Production FOPG Flight Operations Planning Group FOPP Follow on Parts Production FOPS Flight Operations Planning Schedule FOR Flight Operations Review FOR Force FORTRAN Formula Translation FOS Flight Operations Support FOSDIC Film Optical Sensing Device for Input to Computers FOSO Flight Operations Scheduling Officer FOSP Flight Operations Support Personnel FOST Flight Operations SUPPOrt Team FOT Flight Operations Team FOV First Orbital Vehicle FOV Field of View (Vision) FP Fuel Pressure FP Function Path FP Fine Pointing FP Fixed Point FP Flight Plan FP Freezing Point FPB Fuel Preburner FPBOV Fuel Preburner and Oxidizer Valve FPC Forward Power Controller FPC Fluids Pressure Control FPCA Forward Power Control Assembly FPCA Forward power controller assembly FPE Functional Program Element FPEG Fast Pulse Electron Gun FPHB Flight Procedures Handbook FPIF Fixed Price Incentive Fee FPL Full Power Level FPL Full Power Load FPM Folding Platform Mechanism FPM Feet per Minute FPOV Fuel Preburner Oxidizer Valve FPP Freon Pump Package FPPR Fixed Price with Price Revision FPR Flight Performance Reserve FPS Feet per Second FPS2 Feet per second squared FPS Flight per Second FPS Forward Power Supply FPS Frames Per Second FPU Floating Point Unit FPV Flow Proportioning Valve FQ Flight Qualification FQI Flight Qualification Instrumentation FQR Flight Qualification Review FQR Flight Qualification Recorder FQT Formal Qualification Test FR Flight Rule FR Firing Room FR Frame FRAGNET Fragmented Network FRB Failure Review Board FRC "Flight Research Center, California" FRCI Fibrous refractory composite insulation FRCS Forward Reaction Control System (Subsystem) FRCS Forward reaction control system FRD Flight Requirements Document FRE Flight Related Element FRE Format Request Element FREO DIV FrequencY Divider FREQ Frequency FREQ CONV Frequency Converter FRF Flight Readiness Firing FRFT Flight Readiness Firing Test FRJD Forward Reaction Jet Driver FRL Fuselage Reference Line FRL Frame Reference Line FRMT Format FRP Fuselage Reference Plane FRR Flight Readiness Review FRRID Flight Readiness Review Item DescriPtion FRRID Flight Readiness Review Item DisPosition FRSI Felt Reusable Surface Insulation FRSI Flexible reusable surface insulation FRT FrequencY ResponseTest FRT Flight Readiness Test FRT Flight Readiness Training FRZR Freezer FS Functional Schematic FS Freon Servicer FS Fail-Safe FS Flight System FS Fault Summary FS Federal Specification FS Fire Suppression FS Fail to Sync FS Full Scale FS Fuselage Station FSAA Flight Simulator for Advanced Aircraft FSC Federal Stock Classification FSCM Federal Supply Code for Manufacturers FSCP Fire Sensor Control Panel FSD Flight Simulation Division (JSC) FSD Full Scale Development FSE Flight Simulation Engineer FSF First Static Firing FSGS Flare/Shallow Glide Slope FSI Final Systems installation FSIM Functional Simulator FSIWG Flight System Interface Working Group FSK Frequency Shift Keyed (Keying) FSL Flight Systems Laboratory FSL Flight Simulation Laboratory FSLO First Spacelab Payload FSLT First Sea Level Test FSM Fuel Supply Module FSN Federal Stock Number FSO Functional Supplementary Objective FSOH Flight Support Operations Handbook FSP Fault Summary Page FSR Final System Release FSR Flight Specific Requirements FSRR Flight System Readiness Review FSRR Flight Software Readiness Review FSRS Flight System Recording System FSS Field Spectrometer System FSS Flight Systems Simulator FSS Flight Support System FSS Fire Suppression System FSS Fixed Service Structure FSS Flight Support Station (for MMU) FSS Flight Support Structure FSS Fixed service structure FSSR Functional Subsystem Software Requirements FSSR Flight Systems Software Requirements FSTE Factory Special Test Equipment FSU Freon Servicing Unit FSW Flight Software FT Feet FT Flight Team FT Flight Test FT Formal Training FT Functional Test FT/SEC Feet per Second FT&C Formal Training and Certification FTA Flight Test Article FTA Fault Tree Analysis FTA Fatigue Test Article FTC Flight Test Conductor FTC Florida Test Center (MDAC) FTE Factory Test EquiPment FTE Flight Test Engineer FTE Forced Test End FTIS Flight Test Instrumentation System FTO Functional Test Objective FTO Flight Test Objective FTOH Flight Test Operations Handbook FTOH Flight Team Operations Handbook FTP Flight Test Procedure FTP Functional Test Program FTP Function Test Progress FTP Full Throttle Position FTR Functional Test Requirement FTR Flight Test Requirement FTRD Functional Test Requirements Document FTRD Flight Test Requirements Document FTS Federal Telecommunications System FTS Flight Test Station FTS Flight Test System FTS Functional Test Specifications FU Flight Unit FU Fuel FUB Forward Utility Bridge FUD First Use Date FUNC Function FUNCT Functional FUO Follow-up Output FUS Fuselage FUS/LF "Fuselage, Lower Forward" FUS/UF "Fuselage, Upper Forward" FUSLG Fuselage FV Front View FV FlighL Version FVF First Vertical Flight FVMS Fluid Volume Measurement System FVV Facility Verification Vehicle FW Flag Word FW Fuel Wasting FWB Fahrenheit Wet Bulb FWD Forward FWD HT SHLD Forward Heat Shield FWG Facility Working Group FWW "Food, Water, and Waste" FWWM "Food, Water, and Waste Management" FWWMS "Food, Water, and Waste Management System (Subsystem)" FXD Fixed FY Fiscal Year Fl Fault Identification [G] G Giga (Billion) G Gravity G Units of Gravitational Force G IWG Ground Interface Working Group G LOW Gross Lift-Off Weight G LOW Ground Lift-Off Weight G CCC Ground Control Computer Center G F&P "Gases, Fluids, and Propellants" G&A General and Administrative G&C Guidance and Control G&N Guidance and Navigation G&NGuidanc and navigation G&NS Guidance and Navigation Subsystem G-11 Gulfstream 11 (Shuttle Training Aircraft) G-A Ground-to-Air G-G Ground-to-Ground G-MEM General Memory G-MEM GPC-Memory G-V Gravity-Velocity G/A Ground-to-Air G/E Graphite Epoxy G/G Ground-to-Ground G/S Guided steering G/T Antenna Gain-to-Noise Temperature Ratio G02 Ga G02 Gaseous Oxygen GA Gage GA General Assembly GA Glide Angle GA Gyro Assembly GA&CS Ground Acquisition and Command Station GAC Ground Attitude Control GAC Grumman Aerospace Corporation GACU Ground Air Conditioning Unit GACU Ground Avionics Cooling Unit GAIN Graphic Aids for investigating Networks GAM Gamma GAO General Accounting Office GAP GOAL Automatic Procedure GAPL Group Assembly Parts List GAS Get-Away Special GASPI Guidance Attitude Space Position Indicator GATP Ground Acceptance/Article Test Procedure GATT Gate Assisted Turnoff Thyristor GBI Grand Bahama Island GBL Government Bill of Lading GBR Glass Bead Rating GBS Ground Based Software GC Gigacycles (1000 Megacycles) GC Ground Control GC Guidance Control GC Gyrocompassing GCA Ground Controlled Approach GCC Ground Communications Coordinator GCC Ground Control Center GCCO Ground Control Checkout GCD "Gyrc)-Compass, Desired Cluster Orientation" GCDC Ground Checkout Display and Control GCDCS Ground Checkout Display and Control System GCE Ground Checkout Equipment GCF Ground Communications Facility GCHX Ground Cooling Heat Exchanger GCI Ground Controlled Interception GCIL Ground Control Interface Logic GCIL Ground command interface logic GCILC Ground Command Interface Logic Controller GCILU Ground Control Interface Logic Unit GCL Ground Coolant Loop GCL Ground Control Landing GCN Ground Control Network GCN Ground Communications Network (A/G Worldwide Net) GCO Ground Checkout GCOS General Computer Operational System GCOS Ground Computer Operating System GCR Ground Controlled Radar GCS Guidance Cutoff Signal GCS Ground Communications System GCTS Gas Component Test Stand GCTS Ground Communication(s) Tracking System GCU Gyro Coupling Unit GCU General Control Unit GCU Generator Control Unit GCU Ground Cooling Unit GCV Gaseous Oxygen Control Valve GD Guard GDA Gimbal Drive Actuator/Assembly GDBS Generalized Data Base System GDC General Dynamics Convair GDC Gyro Display Coupler GDP Generalized Documentation Processor GDS "Goldstone, California (STDN)" GDS GNC Dynamic Simulator GDSD Ground Data SYstems Division GDSM Ground Data Systems Manager GDSO Ground Data Systems Officer GDSSR GDSD Staff Support Room GDX "Goldstone, CA (STDN Site, 2nd Antenna)" GE General Electric GECALL GCOS Program Element Name GEDAC General Electric Detection and Automatic Correction GEN "Generate, Generator" GENOPAUSE Geodetic Satellite in Polar Geosynchronous Orbit GEOD Geodetic GEOSEPS General Summary Edit Program GEOSEPS Geosynchronous Solar Electric Propulsion Stage GERT Graphical Evaluation and Review Technique GES Goddard Experiment SuPport System GESYOT GCOS Program Element Name GET Ground Elapsed Time GETI Ground Elapsed Time of Ignition GETIL Ground Elapsed Time of Landing (for TIG of GETIL Abort Burn) GETS Ground Equipment Test Sets GF Gage Factor GFAE Government Furnished Aircraft Equipment GFAE Government Furnished Aerospace Equipment GFD Government Furnished Data GFE Government Furnished Equipment GFM Government Furnished Material GFP Government Furnished Property GFRP Glass Fiber Reinforced Plastics GFRP Graphite Fiber Reinforced Plastics GFS Government Furnished Software GFY Government Fiscal Year GG Gravity Gradient GG Gas Generator GH2 Gaseous Hydrogen GH2 Gaseous hydrogen GHA Greenwich Hour Angle GHA General Housekeeping Area GHC Ground Half Coupling GHX Ground Heat Exchanger GHe Gaseous Helium GHz Gigahertz GIA GPC Interface Adapter GIDEP Government-industry Data Exchange Program GIE Ground Instrumentation Equipment GIM Generalized Information Management GIRD Ground Integration Requirements Document GITG Ground Interface Technical Group GLAADS Gun Low Altitude Air Defense System GLC Generator Line Contractor GLD Glide Slope GLL Galileo GLP Goal Language Processor GLRSHLD Glare Shield GLS Ground Launch Sequence (Sequencer) GLY Water-Glycol Mixture GLY Glycol GM Gaseous Mixture GM Geometric Mean GMAL General Electric Macro Assembly Language GMBL Gimbal GMCL Ground Measurements Command List GMIL Sp GMIL Spaceffight Tracking and Data Network (STDN) GML Ge GML General Measurement Loop GMMC Gr GMMC Ground Master Measurements List GMN Go GMN Gorman (TACAN Station) GMT Greenwich Mean Time GMT Gr GMT Greenwich Mean Time GN Ga GN Gain GN&C "Guidance, navigation and control" GN&C Gu "GN&C Guidance, Navigation, and Control" GN2 Gaseous nitrogen GN2 Ga GN2 Gaseous Nitrogen GNC Gu GNC Guidance and Navigation COmPuter GNCFTS GN GNCFTS GN&C Flight Test Station GNCIS GN GNCIS GN&C Integration Simulator GNCS Gu GNCS Guidance and Navi-oation Control System GNCTS GN GNCTS GN&C Test Station GND Gr GND Ground GND C/0 Gr GND C/0 Ground Checkout GNP Gr GNP Gross National Product GO Ge GO General Order GO2 Gaseous oxygen GOAL Gr GOAL Ground Operations Aerospace Language GOC Gr GOC Ground Operations Coordinator GOCA Gr GOCA Ground Operations Control Area GOE Gr GOE Ground Operating EquiPMent GOES Ge GOES Geostationary Operational Environment Satellite GOM KS GOM KSC Ground Operations Manager at DFRC or WSMR GOMMS Gr GOMMS Ground Operations and Material Management System GOMS Gr GOMS Ground Operations Management System GOP Gr GOP Ground Operations Panel GOPG Gr GOPG Ground Operations Planning Group GOR Gr GOR Ground Operations Review GORP Gr GORP Ground Operations Requirements Plan GORS Gr GORS Ground Observer RF System GOSS Gr GOSS Ground Operations Support System GOWG Gr GOWG Ground Operations Working Group GOX Ga "GOX Gaseous Oxygen (GO,)" GP Group GP General Purpose GP Ge GP General Publication (RSC) GPA General Purpose Amplifier GPAS General PurPose Airborne Simulator GPBIM General Purpose Buffer interface Module GPC General Purpose Computer GPC Gel Permeation Chromatograph GPC General-purpose computer GPCB GOAL Program Control Block GPD Gimbal Position Display GPH Gallons per Hour GPI Gimbal Position Indicator GPI Ground Position Indicator GPL General Purpose Laboratory GPL Goal Processing Language GPM Gallons per Minute GPME General Purpose Mission Equipment GPRN GOAL Test Procedure Release Notice GPS Global Positioning System GPS Gallons per Second GPS General Processing Subsystem GPS Global Positioning Satellite GPS Ground Power Supply GPS Ground Processing Simulation GPSS General Purpose System Simulator GPTE General Purpose Test Equipment GPU Ground Power Unit GPUR GOAL Test Procedure Update Request GR Ground R@le GRE Gamma Ray Explorer GRID Graphic Retrieval and Information Display GRN Green GRO Gamma Ray Observatory GRTLS Glide Return to Launch Site GRTLS Glide Return to Landing Site GS Ground Station GS Ground System GS Ground Speed GS Gas Servicer GS Glide Slope GS Glide slope GSA General Services Administration GSAT General Satellite (STS) GSCU Ground Service Cooling Unit GSDL Ground Software Development Laboratory GSE Ground Servicing Equipment GSE Ground Support Equipment GSE Ground support equipment GSEL Ground Support Equipment List GSFC "Goddard Space Flight Center (Greenbelt, MD)" GSFC Goddard Space Flight Center GSI Government Source Inspection GSI Glide Slope Indicator GSI Glide slope indicator GSIU Ground Standard Interface Unit GSO Ground Support Office GSO Ground Support Operations GSO Ground Systems Operations GSS Ground Support System GSS Ground Support Software GSSA Ground Support Systems Activation GSSC Ground Support Systems Contractor GSSC Ground Support Simulation Computer GSSI Ground Support System Integration GST Ground System Test GSTAR General Satellite (ELV) GSTDN Ground Spacecraft Tracking and Data Network GSTDN Ground Space Flight Tracking and Data Network GSTDN Ground space flight tracking and data network GSTF Ground Systems Test Flow GSU Gas Servicer Unit GSVP Ground Support Verification Plan GT Gyro Torque GT Ground Test GT Greater Than GT Ground Team GT&A Ground Test and Acceptance GTA Ground Test Access GTA Ground Test Article GTA Gas Tungsten Arc GTA Ground Torquing Assembly GTC Glycol Trim Console GTC Ground Test Conductor GTCU Ground Thermal Conditioning Unit GTI Ground Test Instrumentation GTI Grand Turk Island GTM Ground Team Manager GTM Ground Test Motor GTS General Test Support GTS GN&C Test Station GTS GNS Test Station GTU Glycol Trim Unit GUCP Ground Umbilical Carrier Plate GUID Guidance GUIDO Guidance Officer GUL GSE Utilization List GUSB Guided Unified S-Band GVA GOX Vent Arm GVO Gaviota (TACAN Station) GVT Ground Vibration Test GVTA Ground Vibration Test Article GW Gross Weight GWA General Work Area GWM Guam (STDN) GWT Ground Winds Tower GYM "Guaymas, Mexico (Remote Site)" GYRO Gyroscope GYROA Gyro A GYROCOMP Gyrocompassing Geosynchron Geosynchronous Operational Environmental Satellite Ground Oper Ground Operations Review Panel [H] H Al H AlHazardous (Task Classification) H Al H Altitude H Al H AlAltitude Rate H Al H AlHead H Al H AlHenry (Si Unit) H Al H AlHigh H Al H AlHorizontal H Al H AlHot H Al H AlHours H Al H AlMomentum H 2 Hydrogen H 20 Water H M Hinge Mount H /'E Heat Exchanger H 1ST History H EPA High Efficiency Particle Air (Filter) H EPA High Efficiency Particle Accumulator H LTL High Level Test Language H-CITE Horizontal-Cargo Integration Test Equipment H/L Hardline H/O Handover H/S Heat Shield H/S IR Hardware/Software Integration Review H/T Heat Treat H/W Hardware H2 Hydrogen HA Hazard Analysis HA Apogee Altitude HA High Altitude HAA High Altitude Abort HAB Habitation HAC Heading Alignment Cylinder HAC Heading Alignment Circle HAC Heading Alignment Cone HAC Heading alignment cylinder HAD Heat Actuated Device HAFB Holloman Air Force Base HAINS High-accuracy inertial navigation system HAK Horizontal Access Kit HAL High Order Assembly Language HAL High Order Articulated Language HAL Houston Aerospace Language HAL/S High Order Programming Language for Spacelab Usage HAL/S High Order Assembly Language/Shuttle HAL/S Computer HAL/S High Order Assembly Language for Shuttle Flight HAL/S High-order assembly language/ shuttle HAM Height Adjustment Maneuver HAP Hardware Allocation Panel HAS Hydrogen Actuation System HAS Hydraulic Actuation System HAS Holddown Alignment Support HAST High Altitude Supersonic Target HAW Hawaii (STDN) HB High Bay HB Handbook HBR High Bit Rate HBT Heflex Bio-Engineering Test HBW Hot Bridge Wire HC Hybrid Computer HC Head Count HC Hand Controller HCED Hand Controller Engage Driver HCF High Cycle Fatigue HCF HIM Configuration File HCL Horizontal Centerline HCM Hard Copy Module HCMM Heat Capacity Mapping Mission HCR High Cross Range HCSI "Hughes Communications Services, Inc." HCSL Hybrid Computation and Simulation Laboratory HCU Hydraulic Charging Unit HCV Hydrogen Check Valve HD Hoiddown HD Horizontal Drain HD Hydrogen Drain HD Highly Desirable HD Heavy Duty HDA Housekeeping Data Acquisition HDC HYbrid Device Controller HDC Hasselblad Data Camera HDDR High-Density Digital Recorder HDG Heading HDP Holddown Post HDQ Headquarters HDR High Data Rate HDR High data rate HDRA High Data Rate Assembly HDRM High Data Rate Multiplexer HDRR High Data Rate Recorder HDRR High-data-rate recorder HDRSS High Data Rate Storage System HDS Hardware DescriPtion Sheet HDST Headset HDW Hardware HDWE Hardware HE High Energy Astrophysics HE Heat Exchange (Exchanger) HEAO High Energy Astronomy Observatory HEAP High Energy Aim Point HECV Helium Check Valve HEG Helium Gage HEGV Helium Gage Valve HEM Hitchhike Experiment Module HEMI Hemispherical (S-Band Antenna) HEMV Helium Manual Valve HEO High Energy Orbit HER HIM EquiPment Rack HERSCP Hazardous Exposure Reduction and Safety Criteria Plan HESS High Energy Squib Simulator HETM Hybrid Engineering Test Model HEX Heat Exchanger HEX Hexadecimal HEX Hexagon HF High Frequency HF Horizontal Flight HF Hot Firing HF Hydrogen Fill HF Hyperfiltration HF Hard Failure HFA High Frequency Accelerometer HFC Heat Flow and Convection HFC Hydraulic Flight Control HFCT Hydraulic Flight Control Test HFCV Helium Flow Control Valve HFDS Hydrogen Fluid Distribution System HFE High Frequency Executive HFM Hollow Fiber Membrane HFMU High Fidelity Mockup HFO High Frequency oscillator HFS Horizontal Flight Simulator HFT Horizontal Flight Test HFTF Horizontal Flight Test Facility HFTS Horizontal Flight Test Simulator HFX High Frequency Transceiver HG High Gain HGA High Gain Antenna HGDS Hazardous Gas Detection System HGM Hot-Gas Manifold HGR Hangar HGR&SPTFAC Hangar and Support Facility HGS Hydrogen Gas Saver HGV Hydrogen Gas Valve HGVT Horizontal Ground Vibration Test HHC Hammer Head Crane HHMU Hand Held Maneuvering Unit HI High HI "Honeywell, Inc." HIC "Hickam Air Force Base, Hawaii (Deorb OPT site)" HID Hardware Interface Device HID HIM Interface Distributor HIM Hardware Interface Module HIP Hardware Interface Program HIP Hardware interface program HIPC High Chamber Pressure HIPO Hierarchical Input/Process Output HIPO Hierarchy Plus InPut/Process/Output HISAM Hardware Initiated Standalone Memory HITS High Rate Multiplexer InPut/Output Test System HIU Headset Interface Unit HIU Headset interface unit HIV Helium Isolation Valve HK Housekeeping HL High Level HL Hardline HL Heel Line HL Hydrogen Line HL Hinge Line HLAL High Level Assembler Language HLD Hold HLDS Hydrogen Leak Detection System HLMT Hel met HMA Hypergot Maintenance Area HMC Hypergolic Maintenance and Checkout HMC Hybrid Microcircuit HMCC Hypergolic Maintenance and Checkout Cell HMCF Hypergolic Maintenance and Checkout Facility HMCF Hypergolic Maintenance and Checkout Facility HMD Helmet-Mounted Display HMF Horizontal Mating Facility HMF Hypergot Maintenance Facility HMP Hydrozene Monopropeflant (RCS Propellant) HMS History Memory System HMU Hardware Mockup HMV Hydrogen Manual Valve HNDLER Handler HNGR Hangar HO Hydrogen-OxYgen HOL High Order Language HOLC High Order Language Computer HORIZ "Horizon, Horizontal" HOS High Order Software HOSC Huntsville Operations Support Center HP Handling Procedure HP Hewlett Packard HPF Horizontal Processing Facility (O&C) HPFT High-pressure fuel turbopump HPFTP High Pressure Fuel Turbopump HPG High Pressure Gas HPGS High Pressure Gas System HPI High Performance insulation HPOP High Pressure Oxidizer Pump HPOT High Pressure Oxidizer Turbopump HPOT High-pressure oxidizer turbopump HPOTP High Pressure Oxidizer Turbopump HPPF Horizontal Payloads Processing Facility HPR Hydrogen Pressure Regulator HPRV Hydrogen Pressure Relief Valve HPS Hydraulic Power SYstem HPT High Pressure Test HPU Hydraulic Power Unit HPU Hydraulic power unit HPV High Pressure Valve HQ Headquarters (HDQ preferred) HQR Handling Qualities Rating (Cooper-Harper) HR Historical Record HR Hour HRAA High Rate Acquisition Assembly HRC Hasselblad Reflex Camera HRD High Rate Dosimeter HRD High-rate dosimeter HRDA High Rate Data Assembly HRDM High Rate Demultiplexer HRDR High Rate Digital Recorder HRDS High Rate Data Station HRIR High Resolution Infrared Radiometer HRL Horizontal Reference Line HRM High Rate Multiplexer HRM High-rate multiplexer HRPS Hazard Reduction Precedence Sequence HRS Hours HRSI High Temperature Reusable Surface Insulation HRSI High-temperature reusable surface insulation HRT High Resolution Tracker HS Horizon Sensor HS High Speed HS Heat Shield HS-C Hamilton Standard CO Absorbent Material HSC Hardware/Software Coordination HSCU Hydraulic SUPPly and Checkout Unit HSD HoriZontal Situation Display HSD High Speed Data HSD Hamilton Standard Division HSDL High Speed Data Line HSF Hypergot Servicing Facility HSG High Sustained Gs Acceleration HSI Horizontal Situation Indicator HSI Horizontal situation indicator HSK Horizontal Sling Kit HSL Hardware Simulation Laboratory HSNG Housing HSP Health Stabilization Program HSP High Speed Printer HSR Hardware Status Register HSS High Speed Reader HSS Hydraulic Subsystem Simulator HSS High Stress Strain HSTP Hard Stop HSU Helium Service Unit HT Heat Transfer HT Height HT High Technology HTC Hybrid Technol Ogy ComPuter HTEXCH Heat Exchanger HTG Heating HTLL High Test Level Language HTM High Temperature HTPB Hydroxyl Terminated Polybutadiene (Propellant) HTR HydroxYl Terminated Polybutyiene HTR Heater HTS Heat Transfer System HTS Heat Transport Section HUD Head Up Display HUD Head-up display HUDE Head Up Display Electronics HUL Hardware Utilization List HUM Humidity HUT Hard Upper Torso HV Hydrogen Vent HV High Voltage HV High Velocity HVAC "Heating, ventilating, and Air Conditioning" HVDS Hypergolic Vapor Detection System HVPS High Voltage Power Supply HVR Hover HVSF Honeywelf Verification Simulation Facility HVSL "Holidays, Vacation, and Sick Leave" HW Ha rd wa re HW Hotwire HW Headwind HW/SW Hardware/Software HWWS Hyperfiltration Wash Water Recovery System HX Heat Exchanger HXIS Hard X-ray Imaging Spectrometer HYD HYdraulics HYD Hydraulic Subsystem HYG L Hypergolic HYPACE Hybrid Programmable Attitude Control Electronics He Helium Hg Mercury HiRAP High-resolution accelerometer package High Pressu High Pressure High Ratio Multiplier Hydrogen Purge Hydrogen Re Hydrogen Relief Hz Hertz (Cycles per Second) [I] I NTC/0 I NTC/0Integrated Checkout I LAS Instrument Landing Approach System I LSP Integrated Logistics Support Plan I DAC Integrated Digital-Analog Converter I DAS Integrated Data Acquisition System I DPS Interface Digital Processor I ECM Induced Environment Contamination Monitor I ECO Inboard Engine Cutoff I LCCS Integrated Launch Control and Checkout System I D&CA Inverter Distribution and Control Assembly I F Intermediate Frequency I-load Initial-load IACS Inertial Attitude Control System IAD Interface Agreement Document IAD Interface Analysis Document IAL Immediate Action Letter IAL International Algebraic Language IARS Independent Air Revitalization System IAS Indicated Airspeed IAS Integrated Avionics System IAS Impact Assessment Sheet IASS Inverter/ATCS Support Structure IAT Integrated Avionics Test IAV Inventory Adjustment Voucher IB Inert Building IB Inboard IB Instruction Book IBF Internally Blown Flap IBM International Business Machines IC Intercomputer communication IC/ES Intercommunication/Emergency Station ICA Item Change Analysis ICAO International Civil Aviation Organization ICAO International Civil Aviation Organization ICAR Investigation and Corrective Action Report ICB Interim Change Bulletin ICB Interrupt Control Block ICC Intercomputer Channel ICC Intercomputer Communication ICC Interface Control Chart ICC Interstate Commerce Commission ICCB Integrated Change Control Board ICCP Interface Coordination and Control Procedure ICD Interface Control Document ICDR Incremental Critical Design Review ICDU Inertial CouPling Data Unit ICE Input Control Element ICF interface Control Function ICG In-Flight Coverall Garment ICH Interchanger ICMT Intercontract Material Transfer ICP ICS Control Program ICR Instruction Change Request ICT Influence Coefficient Tests ICTC interface Control Tool ing ICWG Interface Control Working Group ID Identification IDA Interface Display Assembly IDB lnsuit Drink Bag IDC IMBLMS Digital Computer IDC Integrated Displays and Controls IDC Interface Document Control IDCA Inverter Distribution and Control Assembly IDD Interface Definition Document(s) IDE Initial Design Evaluation IDG Integrated Drive Generator IDI Instrumentation Data Items IDMM Intermediate and Depot Maintenance Manual IDO Interdivisional Operations IDP Integrated Data Processor IDR Intermediate Design Review IDR Interim Discrepancy Report IDR Initial Design Review IDRD Internal Data Requirement Description IDRD Information Definition Requirements Document IDS Interface Data Sheet IDS Item Description Sheet IDSD Institutional Data System Division (JSC) IDSO Interdivisional Sales Order IDT I-load Data Tape IDTA Interdivisional Technical Agreement IDU Interface Demonstration Unit IDWA Interdivisional Work Authorization IE Industrial Engineering IEA Integrated Electronic Assembly IEA Integrated electronic assembly IECS Igloo Environment Control Subsystem IED Interacting Equipment Documents IEF Isoelectric Focusing IEP Instantaneous Effective Photo Cathodes IF Integration Facility IFA In-Flight Analyses IFASC Integrated Functions Assessment Steering Committ IFB Invitation for Bid IFM In-Flight Maintenance IFO Information Systems Office IFOT In-Flight Operations and Training IFR Instrument Flight Rules IFRU In-Flight Replacement Unit IFT In-Flight Test IFTM In-Flight Test Maintenance IFTS In-Flight Test System IFU Interface Unit IG Igloo IGA Inner Gimbal Angle IGAX Inner Gimbal Axis IGDS Iodine Generating and Dispensing SYstem IGM Interactive Guidance Mode IGN "Ignition, Ignite" IGOR Intercept Ground OPtical Recorder IGS Inertial Guidance System IGSE In-Space Ground SUPPort Equipment IGV Inlet GUide Valve/Vanes IH/SR Integration Hardware and software Review IHP Indicated Horsepower IHTV Interim Hypersonics Test Vehicle IHX Interloop Heat Exchanger IITCS igloo Internal Thermal Control Section ILA Instrument Landing Approach ILC International Latex Corporation ILC Initial Launch Capability ILLUM Illuminate ILP Integrated Logistics Panel ILS Integrated Logistics System ILS Instrument Landing System ILS Integrated Logistics Support ILS/LAR Integrated Logistics System and Logistics Assess ILS/LAR Review ILSSE Integrated Life Science Shuttle Experiments IM Information Management IMBLMS Integrated Medical Behavioral Laboratory Measuremen IMBLMS System IMCP Integrated Monitor and Control Panel IMD Intermediate IMDB Integrated Maintenance Data Base IMF Inventory Master File IML Inside Mold Line IMP Initial Memory Protection IMPD Impedance IMPLS Impulse IMU Inertial measurement unit IN Information Systems Directorate (KSC) IN Inlet INSTR Instruct INSTR "Instrument, Instrumentation" INSTRUM Instrumentation Subsystem INT Internal INT Integrated Test INT Intensity INTASAT Instituto Nacional De Technica Aeroespacial Satell INTCHC:iR Interchanger INTCHG Interchange INTCP Intercept INTEGR "Integrate, Integration" INTELSAT International Telecommunications Satellite Organiz INTEROG Interrogate INTF Interface INTG Integration INTLK Interlock INTR Interior INTRG Interrogate INTRLVR Interleaver INTRPT Interrupt INTV Interim Hypersonics Test Article INTVL Interval INTVLM Intervalometer INV Inverter INV MG INV MGT Inventory Management IOA Input/Output or Assembly IOA input/Output Adapter IOB InPut/Output Box IOB InPut/Output Buffer IOB InPut/Output Buffer (if Bus IOBPS Input/Output Box and Peripheral Simulator IOE Input/Output Error Log Table IOF Initial Operational Flight IOP Input/output processor IOPL Integrated Open Problem List IOQE Input/Output C)ueue Element IP Inertial Processing IP InstruMentation PCM Data Bus IP Instrumentation Payload IP Identification of Position IP Intermediate Pressure IP Intermediate Pallet IP Igloo Pallet IP Instructor Pilot IP Impact Point IP Instrumentation/pulse code modulation master unit data bus IPACS Integrated Power and Attitude Control System IPAD Integrated Program for Aerospace Vehicle Design IPB Illustrated Parts Breakdown IPB Illuminated Push Button IPC Intermittent Positive Control IPCL Instrumentation Program and Component List IPD Information Processing Division IPDR Incremental Preliminary Design Review IPE Industrial Plant Equipment IPF IUS Processing Facility IPL Initial Program Load IPL Indentured Parts List IPL Initial program load IPR Interim Problem Report IPS ISA Interim Stowage Assembly IPS Interconnecting Station IPS is Installation Support IPS IRV Isotope Reentry Vehicle IPS IRU Inertial Reference Unit IPS ISD Instructional Systems DeveloPment (USAF) IPS isc Initial Software Configuration Map IPS IRIG Inertial Rate Integrating Gyro IPS Inside Radius IPS I RTCM Integrated Real-Time Contamination Monitor IPS Inner Roll Gimbal IPS Instrumentation Power Subsystem IPS IR SPECT Infrared Spectrometer IPS I RAN) IPS IRANSAT franian Government Communications Satellite (replace IPS IRR InsPection Rejection Report IPS IRAN Inspection and Repairs as Necessary IPS IPT In-Plant Transporter IPS IR Inclination of the Ascending Return IPS Initiating Reference Document IPS IPSL Interface Problem Status Log IPS IRL Initiating Reference Letter IPS Inverter Power Supply IPS IRIS Italian Research Interim Stage IPS ips International Pipe Standard IPS Interface Requirement List IPS Interface Problem Sheets IPS Interrange Instrumentation Group IPS IRD Information Requirements Document IPS lglc)O Passive Thermal Control Section IPS IRME Initiator Resistance Measuring Equipment IPS IRG Inertial Rate Gyro IPS Infrared IPS IRIG-B Interrange Instrumentation Group B IPS Inertial Reference Integrating Gyro IPS IRN Interface Revision Notice IPS IPTCS International Pipe Thread IPS Instrument Pointing System (Subsystem) IPS Integral Rocket Ramiet IPS International Rendezvous IPS IRAR Internal Variable IPS Inches per Second ISIL Interim Support Items List ISL Inertial Systems Laboratory ISL/LAR Integrated Logistics System and Logistics Assessment ISL/LAR Review ISLM Integration Shop/Lab Manager ISOL "isolate, Isolation" ISP Instrumentation Support Plan ISP Integrated Support Plan ISP Initial Specific Impulse ISPG Institutional Support Planning GrouP ISPM International Solar Polar Mission ISR Initial System Release ISSL Initial Spares Support List ISTA Intertank Structural Test Assembly ISTB Integrated Subsystem Test Bed ISTF Integrated System Test Flow IT Installation Test IT Identification Transponder ITA integrated Test Area ITA Integrated test article ITAP Integrated Technical Assessment Panel ITC igloo Thermal Control ITE integration Test Equipment ITE Intersite Transportation Equipment ITE Instrumentation Test Equipment ITI Inspection and Test Instruction ITL "Integrate, Transfer, and Launch" ITMG Integrated Thermal/Micrometeoroid Garment ITO Integration and Test Order ITRDS Integrated Test Requirements Documents ITS Instrumentation Telemetry Station ITS Interim Teleprinter System IU Interface unit IUA Interface Unit AdaPter IUA Inertial Unit Assembly IUE Interface Unit Error Count Table IUS Inertial upper stage IVA Intravehicular Activity IVA Intravehicular activity IVAR internal Variable IVBC "Integrated Vehicle Baseline Config,ration" IVE Interface Verification EquiPr-nent IVL lntervatometer IVT Intervehicular Transfer IWBS Indirect Work Breakdown Structure IWG Investigator Working Group IWG Interface Working Group Identificat Identification Data Inertial Gu Inertial Guidance Inner Gimba Inner Gimbal Inner Glide Inner Glideslope Insertion B "Insertion Burn, OMSI" Inside Diam Inside Diameter Installatio Installation Notice Card Installatio Installation Notification Certificate Instrument Group SuPport Equipment Instrument Ground Instrument Checkout Equipment Instrumenta Instrumentation and Communication Instrumenta Instrumentation Group Interchange Interchangeability and Replacement Intercommun Intercommunication SYstem Intercommun Intercommunications Interface Tool Interface C Interface Control Drawing Interface C Interface Control Specification Interface C Interface COmPatibility Record Interface C Interface Control Unit Interface D Interface Document Interface F Interface Functional Analysis Interpretiv Interpretive Co ' Inventory C Inventory Control Point Inverter As Inverter Assembly Issuing Age Issuing Agency Iterative G Iterative Guidance Mode [J] J/M Jettison Motor JAEIC Joint Atomic Energy Intelligence Committee JAN Joint Army-Navy JAS Journal of Aerospace Science JB Junction Box JCL Job Control Language JCP Joint Power Conditions JCT Junction JED Julian Ephemeris Data JETS Joint Electronics Type (Designation) System JETT Jettison JIR Job Improvement Request JOD Joint Occupancy Data JOD Joint Occupancy Date JOIP Joint Operations Interface Procedure JOP Joint Operating Procedure JOP Jupiter Orbiter Probe-Galilee JOR Job Order Request JOVIAL Joules Own Version International Algebraic Language JPC Joint Power Condition JPIC Joint Program Integration Committee JPL Jet Propulsion Laboratory JPL Jet Propulsion Laboratory JPOC JSC Payload Operations Center JRB Joint Review Board JSC Johnson Space Center JSL Jet Select Logic JSLWG Joint Spacelab Working Group JST Joint Systems Test JTA Job Task Analysis JTG Joint Training Group JURG Joint Users Requirements Group Jo Job Order Joule (SI U Joule (SI Unit) [K] K Kelvin K Kilocycle K One Thousand K&H Memory Time Value K-APM KSC Automated Payloads Plan/Requirement K-APN KSC Automated Payloads Notice K-APPS KSC Automated Payloads Project Specification K-CITEM KSC CITE Plan/Requirement K-DODM KSC DOD Plan/Requirement K-DPM KSC DOD Payloads Plan/Requirement K-DPN KSC DOD Payloads Notice K-DPPS KSC DOD Payloads Project Specification K-IUSM KSC IUS Plan/Requirement K-IUSN KSC [US Notice K-IUSPS KSC IUS Project Specification K-MMSEM KSC MMSE Plan/Requirement K-MMSEN KSC MMSE Notice K-MMSEPS KSC MMSE Project Specification K-SLM KSC Spacelab Plan/Requirement K-SLN KSC Spacelab Notice K-SLPS KSC Spacelab Project Specification K-SM KSC Shuttle Management Document K-SPN KSC Shuttle Project Notice K-SPS KSC Shuttle Project Specification K-SSS KSC Shuttle Project Station Set Specification K-STSM KSC STS Plan/Requirement K-STSN KSC STS Notice K-STSPS KSC STS Project Specification K/S Kick Stage KAD "Kadena AB, Ryuku Islands (Deorb OPT Site)" KAPL KSC Approved Parts List KATS Kennedy Avionics Test Set KAU Kilo Accounting Unit KB Keyboard KB Kilobit KBAC Kennedy Booster Assemblv Contractor KBIM Keyboard Interface Module KBPS Kilobits per Second KBU Keyboard unit KCAS Knots Calibrated Airspeed KCRT Keyboard Cathode RaY Tube KCS Keyboard Configuration Studies KDMS Kennedy Data Management SYstem(s) KDN Kinetically Designed Nozzle KDT Keyboard and Display Test KDU Keyboard and DisPlay Unit KEAS Knots Equivalent Airspeed KHB KSC Handbook KIAS Knc)ts Indicated Airspeed KIP Keyboard Input Processor KIS Kitting Instruction Sheet KMI KSC Management Instruction KMR Kwaialein Missile Range KMS K-Words X Millions of Seconds KN Kitting Notice KNO KSC Notice KOI "Kano, Nigeria (Remote Site)" KOM KSC Organizational Manual KOM KSC Operation instruction KOPS Thousand of Operations per Second KPD KSC Program Directive KPPS KiloPulses per Second KPRD KSC Program Requirements Document KPS Kilometers Per Second KSA Ku-Band Single Access KSA Ku-band single access KSC John F. Kennedy Space Center KSC Kennedy Space Center KSCAP Kennedy Space Center Area Permit KSSS KSC Station Set Specification KT Kit KT Knots KU Keyboard Unit KUSP Ku-Band Signal Processor KUSP Ku-Band Single Processor KUSP Ku-band signal processor KYBD Keyboard [L] L Launch L Left L Length L Level L Low L Lumen L&C Laboratory and Checkout L&D Landing and Deceleration L&L Launch and Landing L&S Logistics and SuPport L&T Laboratory and Test L-BAND S-Band 390 to 1550 MHz L-L Line-to-Line L-P Low Pressure L/D Length-to-Diameter L/D Lift-to-Drag (Ratio) L/H Local Horizontal L/O Lift-off L/S LLoad SYstem L/S Landing Site L/T Load Test L02 Liquid Oxygen LA Launch Area LA Lanthanum LA Launch Abort LA Launch Azimuth LA Lightning Arrester LA Launch Aft LA Low Attitude LAAD Los Angeles Aircraft Division (Rockwell) LACB Landing Aids Control Building (SLF at KSC) LACIE Large Area Crop Inventory Experiment LACIP Large Area Crop Inventory Program LAGEOS Laser Geodynamic Satellite LAGS Launch Abort Guide Simulation LAIR Liquid Air LAIU Launch Abort Interface Unit LAN Local Area Network LAPS Left Aft Propulsion System (Subsystem) LARS Laminar Angular Rate Sensor LARSSYAA for Aircraft Analysis LARSSYAA Laboratory for Application of Remote Sensing System LASCOT Large Screen Color Television System LASV Low Altitude Supersonic Vehicle LAT Lateral LAT Latch LAT Large Angle Torque LAT Lot Acceptance Test LAT Latitude LATS LDEF Assembly and Transportation System LB Lower Brace LB Low Bay LB Load Bank LB Launch Bus LB Launch Boost LBDT Low Bay Dolly Tug LBK Left Bank LBL Left Buttock Line LBM Load Buffer Memory LBNPD Lower Body Negative Pressure Device LBR Low Bit Rate LC Left Center LC Launch Complex LC Launch Critical LC Launch Countdown LCA Load Controller (Control) Assembly LCA Launch Control Amplifier LCA Load controller assembly LCB Least Common Bit LCC Life Cycle Cost LCC Launch Control Center LCC Launch Commit Criteria LCC Launch Control Center (KSC) LCCD Launch Commit Criteria Document LCD Launch Countdown LCF LowCycle Fatigue LCG Liquid Cooled Garment LCG Liquid-cooled garment LCH LatLaunch LCH Latch LCHTF LowCYcle High Temperature Fatigue LCL Local LCM Least Common Multiple LCMS LowCost Modular Spacecraft LCO MMCUniform Central Number LCOM Logic Control OutPut Module LCR LowCross Range LCS Launch Control System LCS LauList of Command Signals LCT Launch Countdown LCU Line Coupling Unit LCUG Liquid Cooling under Garment LCVG Liquid Cooling and Ventilation Garment LCVG Liquid cooling and ventilation garment LD LatLoading Dock LD Lateral Direction LDB LauLogistics Data Bank LDB Launch Data Bus LDEC Lunar Docking Events Controller LDEF Long Duration ExPosure Facility LDG Landing LDIU Launch Data Interface Unit LDMK Landmark LDR LowData Rate LDR Low data rate LDS Landing/Deceleration Subsystem LDS "LanLanding, Deservicing, and Safing" LDS LanLoads LDT Linear Displacement Transducer LE Launch Escape LE LauLeading Edge LEA Logistics Engineering Analysis (Analyses) LEB Lower Equipment Bay LEC Lockheed Electronics Company LED Light Emitting Diode LED Light-emitting diode LEH Launch/Entry Helmet LEM Launch Escape Monitor LEM Laboratory Environment Model LEO Low Earth Orbit LER Long Eye Relief (Optics) LES Launch Equipment Shop LES Launch Escape Subsystem LESS Leading Edge Structure Subsystem LESS Leading Edge Subsystem LESS Leading edge structure subsystem LETF Launch Equipment Test Facility LETF Launch Equipment Test Facility (KSC) LF Low Frequency LF Load Factor LF Left Forward LF Launch Forward LF Launch Facility LFAF Low Frequency Accelerometer Flutter LFAM Low Frequency Accelerometer Modes LFAP Low Frequency Accelerometer Pogo LFC Large Format Camera LFO Low Frequency Oscillator LFOP Landing and Ferry Operations Panel LFRR Low Frequency Radio Range LG Landing Gear LG Length LGA Low Gain Antenna LGIU Laser Gyro Interface Unit LH Left Hand LH2 Liquid Hydrogen LH2 Liquid hydrogen LHA Local Hour Angle LHC Left Hand Circular LHCP Left Hand Circular Polarization LHCP Left Hand Circularly Polarized LHP Left Hand Panel LHS Left Hand Side LHe Liquid Helium LIB Left Inboard LIC Load Interface Circuit LID Leadless inverted Device LID Logistics Identification Document LIDAR Laser-Radar LIE Left Inboard Elevon LIM Limit LIMRC LRU Identification and Maintenance Requirements Catal LIMS Logistics Inventory Management System LIN Liquid Nitrogen LIN Linear LINJET Liquid Injection Electric Thruster LIQ Liquid LK Leak LK Lock LL Low Level LL Lever Lock LL Lower Limit LL Lower Left LL Launch and Landing LL Launch Left LL Long Line LL Long Lead LLCF Launch and Landing Computational Facilities LLI Limited Life Item LLIL Long Leadtime Items List LLOS Landmark Line-of-Sight LLP Launch and Landing Project LLPO Launch and Landing Project Office LLS Launch and Landing Site LLT Long Leadtime LM Left Mid LM Long Module LME Launch Monitor Equipment LMF Lower Mid-Fuselage LMG Left Main Gear LMK Landmark LMP List of Measurement Points LMS Logistics Master Schedules LMS Load Measurement System LMSC Lockheed Missiles and Space Corporation LN Line LN2 Liquid Nitrogen LNCH Launch LNDG Landing LNG Liquefied Natural Gas LO Lock-On LO Launch Operations LO Local Oscillator LO2 Liquid oxygen LOA Landing Operations Area LOA Launch Operations Area LOAP List of Applicable Publications LOB Line of Balance LOB Left Outboard LOC Location LOC Localizer LOC Launch Operations Complex LOCC Launch Operations Control Center LOE Line of Effort LOE Level of Effort LOE Left Outboard Elevon LOFAR Low Frequency Acquisition and Ranging LOFO Low Frequency oscillation LOGO Limit of Government Obligation LOI Lunar Orbit Insertion LOL Limit of Liability LOLI Limited Operational-Life items LON Longitude LONG Longitude LOR Lunar Orbit Rendezvous LORA Level of Repair Analysis LORAN Long Range Navigation LOS Loss of Sync LOS Loss of Signal LOS Line of Sight LOS Lift-Off Simulator LOT Lift-Off Time LOV Limit of Visibility LOV Loss of Visibility LOWG Landing Operations Working Group LOX Liquid Oxygen (LO2 LP Launch Pad LP Liquid Propellant LP Low Pressure LPD Landing Point Designator LPD Launch Procedure Document LPDM List of Physical Dimensions LPF Low Pass Filter LPFT LOPW Pressure Fuel Turboprop LPFT Low-pressure fuel turbopump LPFTP Low Pressure Fuel Turbopump LPG Last Page Generator (Distribution List Used in All OMT'S) LPG Liquid Propellant Gun LPLWS Launch Pad Lightning Warning System LPM Lines per Minute LPOP Low Pressure Oxidizer Turbopump LPOT Low-pressure oxidizer turbopump LPOTP Low Pressure Oxidizer Turbopump LPOX Low Pressure Oxygen LPR Line Printer LPS Launch Processing (Processor) System LPS Liters Per Second LPS Launch processing system LPS/CDS LPS/Central Data Subsystem LPTTL Low Power Transistor-Transistor Logic LPW Lumens per Watt LR Landing Radar LR Launch Right LR Left Rudder LR Lower Right LR/LD Line Receiver/Line Driver LRECL Logical Records of Fixed Length LRF Liquid Rocket Fuel LRO Large Radio Observatory LRR Launch Readiness Review LRSI Low Temperature Reusable Surface Insulation LRSI Low-temperature reusable surface insulation LRU Line Replaceable Unit LRU Line-replaceable unit LRV Long Range Video LRV Launch Readiness Verification LS Limit Switch LS Launch Sequence LS Landing Side LS Left Side LS Life Science LS/ST Light Shield/Star Tracker LSA Launch Services Agreement LSA Logistics Support Analysis LSAH Launch Site Accommodations Handbook LSAP Launch Sequence Applications Program LSB Lower Side Band LSB Least Significant Bit LSC Linear Shaped Charge LSCA Logistics Support Cost Analysis LSD Low Speed Data LSD Landing Ship Dock LSE Launch Support Equipment LSE Life Support Equipment LSF Laboratory Simulation Facility LSFE Life Sciences Flight Experiment LSI Large Scale Integration LSID Launch Sequence and Interlock Document LSM Life Science Module LSM I Logistics Support Management Information LSO Landing Support Officer LSO Large Solar Observatory LSP Least Significant Portion LSPDF Life Science Payloads Development Facility LSR Launch Site Recovery LSR Land Sea Rescue LSRM Life Science Research Module LSS "Landing, Separation Simulator" LSS Life Support Subsystem LSS L Life Sciences Space Laboratory LSSF Life Sciences Support Facility LSSM Launch Site Support Manager LSSP Launch Site Support Plan LSSRC Life Sciences Shuttle Research Centrifuge LSST Launch Site Support Team LST Large Space Telescope LST Large Stellar Telescope LST Launch Support Team LST Liquid Storage Tank LST Local Standard Time LSTE Launch Site Transportation Equipment LSU Life Support Umbilical LT Lead Time LT Light LT Lef t LTA Lower Torso Assembly LTD Limited LTD Lift-to-Drag LTG Lighting LTG Linear Tangent Guidance LTM Lead Time Matrix LUB Lubricate LUS Liquid Upper Stage LUT Launcher-Umbilical Tower LV Loading Valve LV Low Voltage LV Load Vertical LV Launch Vehicle LV Lift Vector LV Limit Value LVDC Launch Vehicle Digital Computer LVDT Linear Variable Differential Transformer LVDT Linear Voltage Differential Transformer LVL Level LVLH Local Vertical/Local Horizontal LVLH Local vertical/local horizontal LW Launch Window LWD Left Wing Down LWD Launch Window Display LWG Logistics Working Group LWHS Light-Weight Headset LWHS Lightweight headset LWR Lower LWS Lightning Warning System LaRC "Langley Research Center (Hampton, VA)" LeRC "Lewis Research Center (Cleveland, OH)" Li Lithium LiOH Lithium Hydroxide LiOH Lithium hydroxide [M] M LGS Microwave Landing Guidance System M LA MDM Launch Aft M LA Monochrome Lens Assembly M B/S Megabits per Second M BAC Marshall Booster Assembly Contractor M DSD Mate/Demate Stiffleg Derrick M ECCA Master Electrical Common Connector Assembly M ESA Modular Equipment Stowage Assembly M ESA Miniature Electrostatic Accelerometer M ITTSE Mobile lgor Tracking Telescope System M PTP Main Propulsion Test Program M PTS Multipurpose Tool Set M&C Monitor and Control Panel M&C Maintenance and Checkout M&F Materials and Facilities M&M Materials and Maintenance M&O Maintenance and Operations M&P Materials and Processes M&R Maintenance and Refurbishment M&R Maintenance and Repair M&RF Maintenance and Refurbishing Facility M+R Maintenance and Refurbishment M+R Time in Days before Move Operations M+R Maintenance and Repair M-M-L-S Model-Modes-Loads-Stresses M/F Maintenance Factor M/I Minimum Impulse M/L Maintenance Loop M/LR Maintenance Loop Recorder M/P Main Parachute M/R Mixture Ratio (Fuel to Oxidizer) M/S Measurement Stimuli M/SCI Mission/Safety Critical Item M/U Mockup M50 Mean of 1950 (Coordinate System) MA Master MA Master Alarm MA Multiple Access MA Mission Analysis MA Missed Approach MA Mike Amplifier MA Maintenance (STS) MA Maintenance Ability MA Middeck Act MA Metabolic Analyzer MA Material Authorization MA Multiple-access MA&P Maintenance Analysis and Planning MA&T Manufacturing Assembly and Test MAA Mathematical Association of America MAA Mechanical Arm Assembly MAA Maximum Authorized Altitude MAAB Materials Application Advisory Board MAAR Monthly Associate Administrator's Review MAB Materials Advisory Board MAB Master Acquisition Bus MAB Missile Assembly Building MAB Materials Applications Board MAB Mechanical Automation Breadboard MAC Multiaccess Computer MAC Military Airlift Command MAC Mean Aerodynamic Chord MAC Main Display Console MAC Maintenance Advisory Committee MAC Maximum Allowable Concentration MAC Maximum Concentration of Organics MAC Mean aerodynamic chord MACDS Monitor and Control Display System MACE Mechanical Antenna Control Electronics MACH Machine MACH Velocity Relative to the Speed of Sound MACI "Monitor, Access, and Control Interface" MACO Major Assembly Checkout MACRO Merge and Correlate Recorded Output (Program) MAD Maintenance Analysis Data MAD "Madrid, Spain (STDN)" MADC Multiplexer Analog to Digital Converter MADRE Manufacturing Data Retrieval System MADS Modular Auxiliary Data Systems MADS Modular auxiliary data system MAEP Minimum Autoland Entry Point MAF Mixed Amine Fuel MAF Michoud Assembly Facility MAF Manpower Authorization File MAG Magazine MAG Magnetic MAG Magnitude MAGSAT Magnetometer Satellite MAI Machine-Aided Indexing MAIDS System MAIDS Multipurpose Automatic Inspection and Diagnostic MAIDS Management Automated Information Display System MAIN Maintenance MAINT Maintenance MAIR Manufacturing and Inspection Record MAJ Major MAL Malfunction MAL Material Allowance List MAL Mobile Airlock MALL Malleable MAN Microwave Aerospace Navigation MAN Manual MANF Manifold MAOT Maximum Allowable Operating Time MAP Maintenance Analysis Program MAP Mission Application Program MAP Missed Approach Point MAP Message Acceptance Pulse MAPOLE Magnetic Dipole Spark Transmitter MAPS Measurement of Atmospheric Pollution from Satellites MAPS Measurement of Air Pollution from Satellites MAR Memory Address Register MAR Maintenance and Refurbishment MARS Modular Airborne Recorder System MARS Martin Automatic Reporting System MASDC Military Aircraft Storage and Disposition Center MAT Multiple Actuator Test MAT Meteorological Atmospheric Turbulence MAT Matrix MATCO "Materials Analysis, Tracking, and Control" MATL Material MAU Million Accounting Units MAUS Schewerelosigkeit MAUS Messenschafteliche Autonome Experiment Unter MAX Maximum MAXCO Maximum Dynamic Pressure MB Management Baseline MB Main Bus "MB, mbar" Millibar MBB Messerschmitt-Boklow-Blahn MBC Maximum Breathing Capacity MBCS Motion-Base Crew Station (SMS) MBFP Manufacturing Build and Flow Plan MBI Multibus Interface MBK Medications and Bandage Kit MBK Medications and bandage kit MBL Mobile Unit (TACAN Station) MBO Management by Objective MBPS Million Bits per Second MBPS Megabits per Second MBV Main Base Visit MC&C "Measurement, Command, and Control" MC&W Master Caution and Warning MCA Multichannel Analyzer MCA Motor Control Assembly MCA Monitoring and Control Assembly MCA Maximum Crossing Altitude MCA Master Control Assembly MCBF Mean Cycle between Failures MCC Main combustion chamber MCC-DOD Mission Control Center-DOD MCC-H Mission Control Center-Houston MCC-H Mission Control Center-Houston MCC-K Mission Control Center-Kennedy MCC-NASA Mission Control Center-NASA MCDS Multifunction CRT Display System MCDS Maintenance Control and Display System MCDS Multifunction CRT display system MCDU Multifunction CRT Display Unit MCF Maintenance and Checkout Facility MCF Mission Control Facility MCIU Manipulator controller interface unit MCL Master Configuration List MCL Mass Change Log MCLT Maximum Cruise Level Thrust MCM MADS control module MCN Master Change Notice MCOP Mission Control Operations Panel MCP Monitoring and Control Panel MCP Materials Control Plan MCP Master Computer Program MCP Mission Control Programmer MCP Measurements Control Procedure MCP Master Change Proposal MCP Monitoring and control panel MCPC Manipulator Controller Power Conditioner MCPS Major Cost Proposal System MCR Master Change Record MCT Mission Control Table MCT Maximum Climb Thrust MCVP Materials Control and Verification Program MCiU Manipulator Controller Interface Unit MCiU Mission Control and Interface Unit MCiU Master Control and Interface Unit MD Microdot MD Biomedical Office (KSC Directorate) MD Malfunction Detection MD Manual Direct MD Mission Director MD Manual Disconnect MD Master Dimension MDA Main Distribution Assembly MDA Maintainability Design Approach MDA Middeck Assembly (FDF) MDA Multiple Docking Adapter MDA Motor drive amplifier MDAC McDonnell Douglas Astronautics Company MDAR "Malfunction Detection, Analysis, and Recording" MDAS Meteorological Data Acquisition System MDAS Mission Data Acquisition System MDB Mission Data Book MDC Mission Director Center MDC Main Display Console MDC Mission Duty Cycle MDCA Main Distribution Control Assembly MDCS Material Data Collection System MDCS Master Digital Command System MDCS Malfunction Display and Control System MDCS Maintenance Data Collection System MDD Mate/Demate Device MDD Mate/demate device MDDS Material Directory Data Sheet MDE Modular Display Electronics MDE Mission Dependent Equipment MDE Mission Dependent Experiment MDF Manipulator Development Facility MDF Mating/Demating Facilities MDF Main Distribution Frame MDF Mild Detonating Fuse MDF Mild detonating fuse MDL Master Data Library MDM Multiplexer/Demultiplexer MDM Medical Monitor MDM Manipulator Deployment Mechanism MDM Multiplexer/demultiplexer MDR Mission Data Reduction MDR Missing Data Report MDR Minor Discrepancy Repair MDR Monthly Director's Review MDR Major Design Review MDR Maintenance Demand Rate MDRD Mission Data Requirements Document MDRS Mission Data Retrieval System MDRS Manufacturing Data Retrieval System MDS Mission Development Simulator MDS Malfunction Detection System MDS Minimum Discernible Signal MDS Master Development schedule MDS Minimum Discernible System MDS Management Data System MDT Mean Detonating Time MDT Mountain Daylight Time MDT Measurement Descriptor Table MDT Maintenance Demand Time MDT Mean Down Time MDTSCO McDonnell Douglas Technical Services Company ME Management Engineering ME Main Engine ME Miscellaneous Equipment MEA Main Electronics Assembly MEA Maintenance Engineering Analysis MEA Material Experiment Assembly MEAR Maintenance Engineering Analysis Request MEAS "Measuring, Measurement" MEB Main Electronics Box MEBO Main Engine Burnout MEC Mission Events Controller MEC Master Event Controller MEC Main Engine Controller MEC Master events controller MECA Main Engine Controller Assembly MECF Main Engine Computational Facilities MECH Mechanical MECO Main Engine Cutoff MECO Main engine cutoff MECR Maintenance Engineering Change Request MED Medical MED Medium MED Manual Entry Device MEDICS Medical Information Computer System MEE Mission Essential Equipment MEG Megohm MEI Master Inspection Item MEIG Main Engine Ignition MEIU Main Engine Interface Unit MEL Minimum Equipment List MEL Master Equipment List MELI Master Equipment List Index MELI Minimum Equipment List Index MEM Module Exchange Mechanism MEM Meteoroid Exposure Module MEOP Maximum Expected Operating Pressure MEP Mean Effective Pressure MEP Main Engine Propellant MEP Main Entry Point MEP Management Engineering Program MEP Minimum Entry Point MEP Minimum entry point MER Meridian MER Mission Evaluation Room MERL Materials Engineering Research Laboratory MERL Materials Equipment Requirement List MERSAT Meteorology and Earth Observation Satellite MERU Milliearth Rate Unit MES Main Engine Start MES Mated Events Simulator MES Mission Events Sequence MES Mated Elements Simulator MESC Master Events Sequencer Controller MET Master Events Timer MET Meteorological MET Mission Elapsed Time MET Mission Events Timer MET Mission elapsed time METRO Meteorology METVC Main Engine Thrust Vector MEWG Maintenance Engineering Working Group MF Midfuselage MF Mate and Ferry MF Major Function MF Master Frame MF Medium Frequency (300 to 3000 kHz) MF Middeck Forward MFA Manned Flight Awareness MFBP Manufacturing Flow and Building Plan MFC Multiple Flight Computer MFC Multiple Flight Controller MFD Main Feed MFD Malfunction Detection MFE Mid Frequency Executive MFF MDM Flight Forward MFG Major Functional Group MFG Manufacturing MFMR Multifrequency Microwave Radiometer MFO Major Function Overlay MFR Manipulator Foot Restraint MFR Multifunctional Review MFR Maximum Flight Rate MFR Multifunctional Receiver MFT Mean Flight Time MFTAD Master Flight Test Assignment Document (JSC) MFV Main Fuel Valve MFV Main fuel valve MG Middle Gimbal (YAW) MG Mobile Generator MGA Middle Gimbal Angle MGC Manual Gain Control MGE Maintenance Ground Equipment MGMT Management MGR Manager MGSE Mechanical Ground Support Equipment MGT Major Ground Test MGVT Mated Ground Vibration Test MHA Multiple headset adapter MHC Manipulator Hand Controller MHD Multihead Disc MHE Material Handling Equipment MHF Medium High Frequency MHSC Manipulator Handset Controller MHW Multihundred Watt MHz Megahertz (Megacycles per Second) MIA Multiflex Interface Adapter MIA Multiplexer interface Adapter MIA Multiplexer interface adapter MIB Master Interconnect Board MID Midbody MIL Military MIL GSFC Spaceflight Tracking and Data Network Station MILA Merritt Island Launch Area MILS Missile Impact Location System MILSTRIP Military Standard Requisition and Issue Procedure MIMOSA Mission Modes and Space Analysis MIN Minimum MINW Master Interface Network MIP Modification Instruction Package MIP Mandatory Inspection Point MIP Minimum Impulse Pulse MIP MMU Integration Plan MIPR Military Intergovernmental Purchase Request MIPS Merritt Island Press Site MIR Malfunction Investigation Report MIR Mirror MIT Master Instruction Tape MIT Massachusetts Institut@ of Technology (CSDL) MJCA Midbody Jettison Control Assembly MK Mark MKTI Mission Kit Technical Instruction ML Mobile Launcher ML Mold Line ML Middeck Left ML PED Mobile Launcher Pedestal MLB Multilayer Board MLC Mobile Launcher Computer MLF MDM Launch Forward MLG Main Landing Gear MLG Main landing gear MLI Multilayer Insulation MLL MDM Launch Left MLP Mobile Launch (Launcher) Platform MLP Mobile launcher platform MLR Monodisperse Latex Reactor MLR MDM Launch Right MLS Microwave Landing System MLS Microwave landing system MLW Maximum Landing Weight MM Major mode or mass memory MMACS Maintenance Management and Control System MMAS Material Management Accounting (Accountability) System MMC Mid motor controller MMCA Midbody Motor Control Assembly MMCA Mid motor controller assembly MMCL Master Measurement and Control List MMDB Master Measurement Data Base MMDB Mass Memory Data Base MMDF Mission Model Data File MMES MSFC Mated Element Systems MMH Maintenance Man-Hour MMH Monomethylhydrazine MMH Monomethyl hydrazine MML Master Measurement(s) List MMLS Model-Modes-Loads-Stresses MMPSE Multiuse Mission Payload Support Equipment MMS Multimission modular spacecraft MMSE Multiuse Mission Support Equipment MMSE Multiuse mission support equipment MMT Mass Memory Test MMU Mass memory unit MMU Manned maneuvering unit MN Main "MNA, B, C" "Main Bus A, B, or C" MNVR Maneuver MOA Memorandum of Agreement MOA Minute-of-Angle MOA Make on Arrival MOCF Mission Operations Computational Facilities MOCR Mission Operations Control Room MOD Mission Objectives Document MOD Mission Operations Director MOD Modification MOD Modify MOD "Modulation, Modulator" MOD "Module, Modular" MODARI- Methods of Defeating Advanced Radar Threats MODEM Modulator-Demodulator MODS Modifications MOF Manned Orbital Flight MOL Molecular MON Monitor MOP Mission Operations Plan MOPI Max Rate Output Initiator MOPR Mission Operations Planning Review MOPR Mission Operations Planning Room MOPS Military Operations Phone System MOPS Mission Operations Planning System MOR Manufacturing Operation Record MORD Mission Operations Requirements Document MORD Medical Operations Requirements Document MORT Management oversight and Risk Tree MOS Metal Oxide Semiconductor MOS Metal Oxide on a Substrate MOSPO Mobile Satellite Photometric Observatory MOT Motor MOV Main oxidizer valve MP Mod Package MP Mission Planner MP Melting Point MP Meteorology Panel MP Measuring Point MP Mass Properties MP Management Package MP Medium Pressure MP&C Maintenance Planning and Control MPAD Mission Planning and Analysis Division (JSC) MPB Maintenance Parts Breakdown MPC Midbody Pyro Controller MPC Meteorological Prediction Center MPC Memory Protection Check MPC Manual Pointing Controller MPC Mid power controller MPCA Mid power controller assembly MPD Maximum Permissible Dose MPD Main dc Power Distributor Assembly MPESS Mission Peculiar Experiment Support Structure MPG Multipoint Grounding MPG Multiple Point Ground MPGHM Mobile Payload Ground Handling Mechanism MPHE Material and Personnel Handling EqLjipment MPI Mission Payload Integration MPIIN Modification Procurement Instrument Identification MPIIN Number MPIO Mission Payload Integration Office MPL Mechanical Parts List MPL Manipulation Positioning Latches MPL Maintenance Parts List MPL Minimum Power Level (65%) MPL Minimum power level MPLN Maintenance Planning (Data Base) MPM Manipulator Positioning Mechanism MPM Manipulator positioning mechanism MPMP Mass Properties Management Plan MPMSE Multiuse Payload and Mission Support Equipment MPP Material Processing Procedure MPPSE Multipurpose Payload Support Equipment MPR Maintainability Problem Report MPR Management Program Review MPR Mockup Purchase Request MPS Material Processing System MPS "Master Program ,;chedule" MPS Main Propulsion System (Subsystem) MPS Material Processing Specification MPS Materials Processing in Space MPS Megabits per Second MPS Main propulsion system MPSR Mission Profile Storage and Retrieval MPSR Multipurpose Support Room MPSR Multipurpose Support Room MPST Multipurpose support team MPT Main Propulsion Test MPTA Main Propulsion Test Article MPTA Main propulsion test article MPTF Main Propulsion Test Facility MPVA Main Propellant Valve Actuator MR Mission Report MR Mixture Ratio MR Material Review MR Master Reset MRA Mechanical Readiness Assessment MRB Material Review Board MRC Measurement Requirements Committee MRCR Measurement Requirement Change Request MRD Mission Requirements Document MRD Material Review Disposition MRDR Material Review Disposition Record MRF Measurements/Stimuli Request Form MRF Maintenance Responsibility File MRF Maximum Retarding Force MRI measurement Requirements and Interface MRIR Medium Resolution Infrared Radiometer MRL Manipulator Retention Latches MRL Manipulator Retention Lock MRL Material Requirements List MRL Manipulator retention latch MRL Manipulator retention latch MRR Mission Reconfiguration Request MRS Management Review System MRTC Multiple Real-Time Commands MS/MS Material Science and Manufacturing in Space MSA Minimum Surface Area MSA Material Service Area MSA MSA-1 MSAD Materials Summary Acceptance Document MSB Most Significant Bit MSBLS Microwave Scanning Beam Landing System MSBLS Microwave Scanning Beam Land Station MSBLS Microwave scan beam landing system MSBLS-GS MSBLS Ground Station MSCR Measurement/Stimuli Change Request MSD MARS Supplemental Data MSDS Multispectral Scanner and Data System MSE Mechanical Support Equipment MSE Maintenance Support Equipment MSE Measuring and Stimuli Equipment MSE Mission Staff Engineer MSE Medical Support Equipment MSEC Master Separation Events Controller MSF Manned Space Flight MSF Maintenance Source File MSFC George C. Marshall SPace Flight Center MSFC Marshall Space Flight Center MSFN Manned Space Flight Network MSFP Manned Space Flight Program MSG Mission Support Group MSG Message MSG Mechanical Subsystem Group MSIA Multispectral Image Analyzer MSID Measurement Stimulation identification MSK Manual Select KeYboard MSL Missile MSL Mechanical System(s) Laboratory MSL Mean Sea Level MSLD Mass Spectrometer Leak Detector MSN Mission MSOB Manned Spacecraft Operations Building (O&C preferred) MSOIN Minor Subcontractor or IDWA Notification MSR Module Support Rack MST Module Service Tool MST Mountain Standard Time MST Measurement Status Table MST Mobile Service Tower MSTR Master MSVP Master Shuttle Verification Plan MT Mission Time MT Mean Time MT Mission Trajectory MT Mechanical Technician MT Maximum Torque MT Magnetic Tape MT Master Timer MT Mountain Time MT Master Tool MT Mount MTA Mass Thermal Analysis MTA Major Test Article MTA Maintenance Task Analysis MTB Materials Testing 13ranch MTBD Mean Time between Demand MTBF Mean Time between Failure MTBM Mean Time between Maintenance MTBMA Mean Time between Maintenance Action MTBR Mean Time between Replacement MTC Manual Traffic Control MTC Master Thrust control MTC Master Thrust Controller MTC Mission and Traffic Control MTCA Monitor and Test Control Area MTCU Magnetic Tape Control Unit MTD Mounted MTDSK Magnetic Tape Disk MTE Multisystem Test Equipment MTE Maintenance Test Equipment MTEC Maintenance Test Equipment Catalog MTEE Electrical Maintenance Test Equipment MTEEC Electronic Maintenance Test Equipment MTEF Fluid Maintenance Test Equipment MTEM Maintenance Test Equipment Module MTEM Mechanical Maintenance Test Equipment MTEO Optical Maintenance Test Equipment MTF Mississippi Test Facility (now NSTL) MTFO Modular Training Field Option MTG Mounting MTGP Monitor Table Generator Program MTGW Maximum Total Gross Weight MTK Mechanical Time Keeping MTL Material MTL Main Transfer Line MTLP Monitor Table Listing Program MTM Methods Time Measurement MTO Modification Task Outline MTO Magnetic Tape Operator MTO Master Timing Oscillator MTO Maximum Time Out MTO "Mission, Task, Objective" MTOGW Maximum Takeoff Gross Weight MTOW Maximum Takeoff Weight MTP Master Test Plan MTP Manufacturing Technical Procedure MTP Mission Test Plan MTR Motor MTR Magnetic Tape Recorder MTS Metric Time System MTS Master Timing System MTS Magnetic Tape Station (System) MTT Maximum Touch Temperature MTTA Mean Time to Accomplish MTTE Mean Time to Exchange MTTF Mean Time to Failure MTTFF Mean Time to First Failure MTTR Mean Time to Repair MTU Magnetic Tape Unit MTU Master Timing Unit MTU Mobile Training Unit MTU Master timing unit MTVC Manual Thrust Vector Control MTVC Manual thrust vector control MTW Maximum Taxi Weight MUA Material(s) Usage Agreement MUA Maximum Usable Altitude MUF Maximum Usable Frequency MULT Multiple MULT Multiply MUR Manpower Utilization Report MUSAT Canadian Government Satellite MVA Main Valve Actuator MVA Megavolt Ampere MVAS Multipurpose Ventricular Actuating System MVF Manned Vertical Flight MVGVT Mated Vertical Ground Vibration Test MVP Master Verification Plan MVR Maneuver MVT Mission Verification Test MWB M MWB Master Work Book MWG M MWG Maintenance Analyzer Working Group MWP M MWP Maximum Working Pressure MWPR M MWPR Monthly Work Package Report MWR M MWR Mean Width Ratio MY M MY Man Year MYTA M MYTA Maintainability Task Analyses MYVAL M MYVAL Maintainability Evaluation MZFW M MZFW Maximum Zero Fuel Weight Mbps Megabits per second Mg Magnesium MiCiS Material Information Control and Information System MiMS Medical Information Management System Mo Molybdenum Ms Master Switch Ms Mass Spectrometer Ms Material Specification Ms Mission Station Ms Mating Sequence and Control Ms Milestone Ms Military Standard (Parts Designation) Ms Millisecond Ms Multistring Ms Margin of Safety Ms Mission SPecialist Ms Machine Steel Ms Machine Screw [N] N Neutrons N Newton N North N&G Navigation and Guidance (G&N preferred) N/0 Normally Open N/A Not Applicable N/A Next Assembly N/B Narrow Band N/C Numerical Control N/C Normally Closed N/C Nose Cone N/C Not Critical N/D Need Date N/P Not Provided N/W Network N02 Nitrogen Dioxide N2 Nitrogen N2 Nitrogen N204 Nitrogen Tetroxide N2H4 Hydrazine N2HO4 Nitrogen Peroxide N2O4 Nitrogen tetroxide NA Next Action NA Not Applicable NAAL North American Aerodynamic Laboratory (Wind Tunnel) NAC Nacelle NAEC Naval Air Engineering Center NAM National Association Of Manufacturers NAP Navigation Analysis Program NAR Numerical Analysis Research NARS National Archives and Record Services NAS National Aircraft Standard NAS National Academy of Sciences NAS Naval Air Station NASA National Aeronautics and Space Administration NASA National Aeronautics and Space Administration NASCOM NASA Communications (Network) NASTRAN NASA Structural Analysis NATF Naval Air Test Facility NATL National NAV "Navigate, Navigation" NAVAID Navigation Aid NAVDAD Navigationally Derived Air Data NAVPOOL Navigation Parameter Common Pool NAVSAT Navigation Satellite NB Navigation Base NB No-Bias (Relay) NB Nitrogen Base NB Narrow Band NBF Neutral Buoyancy Facility NBS National Bureau of Standards NBT Neutral Buoyancy Trainer NC Numerical Control NC No Comment NC Noise Criteria NC Normally Closed NC No Change NC National Course NC Normally closed NC1 Nominal Correction 1 (Phasing Maneuver) NCC NASA Class Code NCC Nominal Corrective Combination (Maneuver) NCC Network Control Center (GSFC) NCGS Nuclear Criteria Group Secretary NCI Phasing Maneuver NCIU Network Common Interface Unit NCR No Calibration Required NCR Nonconformance/Failure Report NCS Nutation Control System ND NASA Document NDE Nondestructive Evaluation NDI Nondestructive Inspection NDT Nondestructive Test NDTF Nondestructive Test Facility NDTL Nondestructive Test Laboratory NEA Noise Equivalent Angle NEC National Electrical Code NEG Negative NEP Nominal entry point NEP N NEP Normal Entry Point NESC N NESC National Electrical Safety Code NESR N NESR Natural Environment Support Room NET N NET Network (N/W preferred) NETCOM N NETCOM Network Communications NF N NF Natural Flood NFCS N NFCS Nuclear Forces Communications Satellite NFPA N NFPA National Fire Protection Association NFS N NFS Nozzle Flow Sensor NFSP N NFSP Nonflight Switch Panel NFW N NFW Nonfuel Wasting NG N NG Narrow Gage NGM N NGM Nitrogen Generation Module NGT NASA Ground Terminal NH N NH Nominal Heig4t (Adjust Maneuver) NH3 Ammonia NH3 A NH3 Ammonia NH4 H NH4 Hydrazine NHA N NHA Next Higher Assembly NHB N NHB NASA Handbook NHC N NHC National Hurricane Center NI-SIL N NI-SIL Nickel-Silver NIA N NIA NOVA Interface Adapter NIB N NIB Noninterference Basis NIC N NIC Not in Contract NICD N NICD Nickel Cadmium NIDS N NIDS Network Interface Data System NIL N NIL No Limit (NL preferred) NIM N NIM Nuclear Instrumentation Module NIP N NIP Network Input Processor NJP N NJP Network Job Processing NL N NL No Limit NLA N NLA Npxt Lower Assembly NLG Nose Landing Gear NLG Nose landing gear NLT Not Later Than NLT Not Less Than NM Nautical Miles NM Network Manager (GSFC) NM Nonmetallic NMAB National Materials Advisory Board NMC National Meteorological Center NMI NASA Management Instruction NMI Nautical Miles NMO Normal Manual Operation NMR Nuclear Magnetic Resonance NMT Notification of Master Tool NMT Not More Than NMV Nitrogen Manual Valve NNI-I NASA Standard Initiator-Type I (was SMSI) NO Nitric Oxide NO Normally Open NO Not for Off -KSC Distribution NO Normally open NO. Number NOAA National Oceanic and Atmospheric Administration NOC Notation of Content NOC Network Operation Control NOC Not Otherwise Coded NOCC Network Operations Control Center NOCC Network Operations Control Center (GSFC) NOES National Operational Environmental Satellite Serv. NOM Nominal NOM Network OutPut Multiplexer NOR Normal NOR "Northrup Flight Strip, NM (Deorb OPT site)" NORAD North American Air Defense Command NORDSAT Scandinavian Countries Broadcast Satellite NORM Normal NOSL Night/Day Optical Survey of Thunderstorm Lightning NOSP Network Operations Support Plan NOSS National Oceanic Survey Satellite NOZ Nozzle NP Neptunium NPC NASA Publication Control NPD NASA Policy Directive NPDS Nuclear Particle Detection Subsystem NPL Normal Power Level (see RPL) NPN NASA Part Number NPRV Nitrogen Pressure Relief Valve NPS NASA Planning Studies NPSH Net Positive Suction Head NPSP Net Positive Static Pressure NPU Nitrogen Purge Unit NPV Nitrogen Pressure Valve NR Noise Rating NR/T Near Real-Time NRC Nonrecurring Costs NRCC National Research Council of Canada NRI NonreCurring Investment NRL Naval Research Laboratory NRM Nonrecurring Maintenance NRP Normal Rated Power NRS Nonconformance Reporting System NRT Near Real-Time NRTS Not Repairable at This Station NRZ Non-Return-to-Zero NRZ-L Non-Return-to-Zero Level NS Nickel Steel NSA National Standards Association NSD NASA standard detonator NSGT NASA Ground Terminal NSI-I NASA Standard Initiator-Type I (was SMSI) NSLD NASA Shuttle Logistics Depot NSN National Stock Number NSO NASA Support Operation NSP NASA Support Plan NSP Network Signal Processor NSP Network signal processor NSR Nominal Slow Rate NSR Normal Slow Rate (Maneuver) NSR National Slow Rate NSR1 First Coell;ptic Maneuver NSR2 Second Coelliptic Maneuver NSS Nitrogen Supply Subsystem NSSDC National Space Science Data Center NSTL National Space Technology Laboratory (was MTF) NSTL National Space Technology Laboratories NSW NSP Status Word NTIS National Technical Information Service NTO Nitrogen Tetroxide NTP Network Test Panel NTP Normal Temperature and Pressure NTP Notice To Proceed NTS Not to Scale NTS Near Term Schedule NTSO NASA Test Support Office NTTF Network Test and Training Facility NUL Non-GSE Utilization List NVAFB North Vandenberg Air Force Base NVB Navigational Base NVPOWG NASA/VAFB Payload Operations Working Group NVR No Voltage Release NVR Nonvolatile Residue NVR Non-Verification Required NW Nose Wheel NW NASA Waiver NWS Nose-Wheel Steering NWS National Weather Service NWS Nose wheel steering NWSA Nose Wheel Steering Amplifier NWSI New World Services Inc. NWT Nonwatertight NWW Nose Wheel Well NX NOrmal to X-Axis NY Normal to Y-Axis NZ Normal Acceleration NZB Non Zero Binary Nascom NASA communications network Nb Niobium Nd Neodymium Net Positiv Net Positive Suction Pressure Network Int Network Interface Processor Network Pro Network Program Ni N Ni Nickel Nitrogen G Nitrogen Gage Nitrogen P Nitrogen Purge Control Noise Figur Noise Figure Nominal Per Nominal Percent Defective Normal Load Normal Load Factor (g) Normal to Z Normal to Z-Axis Nose to X-A Nose to X-Axis Nose to Y-A Nose to Y-Axis Nose to Z-A Nose to Z-Axis Not Provide Not Provided Not Require Not Required Not Switcha Not Switchable Nuclear Shu Nuclear Shuttle [O] O Engineering Order O&C Operation(s) and Checkout (Building-was MSOB) O&C Operation and Checkout O&C Operations and control O&C Operations and checkout O&FS operations and Flight Support O&M Operation and Maintenance O&P operations and Procedures O&R Overhaul and Repair O-NAV Onboard Navigation O/B Operational Base O/B Onboard O/C Operations Critical O/D On Dock O/D Outside Diameter O/ET Orbiter/External Tank O/F Oxidizet--to-Fuel Ratio O/L Overload O/L-RC Overload-Reverse Current O/R Oxygen Relief O/R Outside Radius O/V Overvoltage O/V-U/V over Voltage/Under Voltage O2 Oxygen OA Overall OA Output Axis OA Orbital Assembly OA Operational Instrumentation MDM-Aft OA Office of Applications (now OSTA) OA Operational Aft (DSC or MOM) OAA Orbiter Access Arm OAA Orbiter Alternate Airfield OAA Orbiter access arm OAC Quality Assurance Chart OAFD Orbiter Air Flight Deck OAFTO Orbiter Atmospheric Flight Test Office OAL Overall Level OALC Ogden Air Logistics Center OAMS Orbital Attitude and Maneuvering System OAS Office Automation System OAS Orbiter Aeroflight Simulator OAS Orbiter Atmospheric Simulator OAS Orbiter Avionics System OASCB Orbiter Avionics Software Control Board OASIS Oceanic and Atmospheric Scientific Information System OASPL Overall Sound Pressure Level OAST Office of Aeronautics and Space Technology OAT Overall Test OAT Operational Acceptance Test OB Onboard OB Operational Base OB Outboard OBC Onboard Computer OBCO Onboard Checkout (Instrumentation) OBCS Onboard Checkout Subsystem OBS "Observe, Observer" OBS Operational Biomedical System OBS Operational Biomed Sensors OBS Operational Bioinstrumentation System OBS Operational bioinstrumentation system OBV Oxidizer Bleed Valve OCALC Oklahoma City Air Logistics Center OCD Operational Capability Development OCDR Orbiter Critical Design Review OCDU Optics Coupling Data Unit (G&N) OCE Ocean Color Experiment OCF Orbiter Computational Facilities OCF Onboard Computational Facility OCH Orbiter Common Hardware OCN Order Control Number OCP Output Control Pulse OCR Optical Character Recognition OCRM Orbiter Crash and Rescue Manuals OCT "Octal, Octave" OD Operations Directive OD Operational Downlink/Downlist OD Outside Diameter OD Oxygen Drain ODB Operational Data Book ODC Other Direct Costs ODCDR Orbiter Delta CDR ODDS Operational Data Delivery Services ODES Optical Discrimination Evaluation Study ODF Orbit Determination Facility ODIN Orbital Design Integration (System) ODP Operational Display Procedure ODR OutPut Data Redundancy ODRAN Operational Drawing Revision Advance Notice ODU Output Display Unit OEAS Orbital Emergency Arresting System OECO Outboard Engine CLjtoff OEM Original Equipment Manufacturer OES Orbiter Emergency Site OESS Orbiter/ET Separation Subsystem OEX Orbiter Experiments OEX Orbiter experiments OF Operational FWD DSC or MDM OF Operational Instrumentation MDM-FWD OF Orbital Flight OF Outside Face OF Oxidizer-to-Fuel Ratio OF Oxygen Fill OFCC Office of Federal Contract Compliance OFDS Oxygen Fluid Distribution System OFDS Orbiter Flight Dynamics Simulator OFI Operational Flight Instrumentation OFI Operational flight instrumentation OFK OPtical Flight Kit OFK Officiaf Flight Kit OFM Original Equipment Manufacturer OFP Operational Flight Profile OFP Operational Flight Program OFP Orbiter Flight Program OFS Orbiter Functional Simulator OFS Orbital (Orbiter) Flight System OFT Orbital Flight Test OFTDS Orbital Flight Test Data System OFTM On-Orbit Flight Technique Meeting OFTR Orbital Flight Test Requirement OG Zero Gravity OG Outer Gimbal (Roll) OG Oxygen Gage OGA Outer Gimbal Angle OGA Outer Gimbal Axis OGE Operating Ground Equipment OGMT Orbiter Greenwich Mean Time OGS Outer Glideslope OGS Oxygen Generation System OGS Quantity Gaging System OGV Oxygen Gage Valve OH Overhaul OH Overhead OHA Operational Hazard Analysis OHA Orbital Height Adjustment Maneuver OHC Onboard Hard Copier OHC Optics Hand Controller OHF Occupational Health Facility OHGVT Orbiter Horizontal Ground Vibration Test OHMM Ohmmeter OI Operational instrumentation OIA Orbiter Interface Adapter OIA Office of International Affairs OIB Orbiter Interface Box OIR Operations Integration Review OISR Open Item Status Report OISSP Office of Interim Space Station Program OIT Orbiter Integrated Test OJT On-the-Job Training OL Operational Left DSC or MDM OL Open Loop OLDB On-Line Data Bank OLDR Quick Look Data Reference OLF Orbiter Landing Facility (now SLF) OLIF Orbiter Landing Instrumentation Facilities OLOW Orbiter Lift-off Weight OLSA Orbiter/LPS Signal Adapter OLSP Orbiter Logistics Support Plan OM Outer Marker (ILS) OM Optical Master OM Operational Mid DSC or MDM OM Orbiter Main Engine OM Orbital Maneuvering Engine OM RS Operations and Maintenance Requirements Specification OMA Orbiter Maintenance Area OMA Operations Maintenance Area OMB Office of Management and Budget OMBUU Orbiter Midbody Umbilical Unit OMCF Operations and Maintenance Control File OMCF Orbiter Maintenance and Checkout Facility OMD Operations and Maintenance Documentation OMD Orbiter Mating Device OMDR Operations and Maintenance Data Record OMDRI Operations and Maintainability Data Record OME Orbital Main Engine OMET Orbiter Mission Elapsed Time OMEWG Orbiter Maintenance Engineering Working Group OML Outer Mold Line OML Orbiter Mold Line OML Outside Mold Line OMMH Orbiter Maintenance Man-Hours OMNI Omni-Range OMNI Omnidirectional OMP Operations and Maintenance Plan OMPR Operational Maintainability Problem Reporting OMPT Observed Mass Point Trajectory OMR Orbiter Management Review OMR Operations Management Room OMR Operations and Maintenance Requirements OMRB Operating Material Review Board OMRC Operational Maintenance Requirements Catalog OMRF Orbiter Modification and Refurbishment Facility OMRP Operations and Maintenance Requirements Plan OMRSD Document OMRSD Operational Maintenance Requirements and Specification OMRSD O&M Requirements and Specifications Documentation OMRSD Operational Maintainability Reporting Systems Document OMS Orbital maneuvering system OMSF Office of Manned Space Flight (now OSTS) OMSP Operational Maintenance Support Plan OMiS Operational Management Information System OMiSS Operation and Maintenance Instruction Summary Sheet(s) ONBD Onboard ONBT Orbiter Neutral Buoyancy Trainer OND Operator Need Date ONR Office of Naval Research OOD Orbiter On-Dock OODP Out-of-Detent Pitch OODR Out-of-Detent Roll OOP Out of Position OOSDP On-Orbit Station Distribution Panel OOT Out of Tolerance OP Operate OP Oxygen Purge OP Operation OP Open OPA Operations Planning Analysis OPB Oxidizer Preburner OPBOV Oxidizer Preburner Oxidizer Valve OPDAR OPtical Detection and Ranging OPE Other Project Element OPER "Operations, Operate, Operator" OPER Operation OPF Orbiter Processing Facility OPF Orbiter Processing Facility OPFC Orbiter Preflight Checklist OPGUID OPtimum Guidance (Technique) OPI Orbiter Payload Interrogator OPIDF Operational Planning Identification File OPIS Orbiter Prime Item Specification OPL Open Problem List OPL Operational OPLF Orbiter Processing and Landing Facility OPNS Operational Phase OPO Orbiter Project(s) Office OPOV Oxidizer Preburner Oxidizer Valve OPOV Oxidizer preburner oxidizer valve OPP OPPosite OPP Opportunity OPPAR Orbiter Project(s) Parts Authorization Request OPPL Orbiter Project Parts List OPR Oxygen Pressure Regulator OPR Orbiter/Payload Recorder OPR Operator OPR Operations Planning Review OPR Office of Primary Responsibility OPRV Oxygen Pressure Relief Valve OPS Orbiter Project schedules OPS Oxygen Purge System OPS Operations Sequence OPS Operations OPS Operational sequence OPSB Orbiter Processing SuPport Building OPSR Operations Supervisor (GSTDN Site) OPSS Orbital Propellant Storage Subsystem OPT optimum OPT optics OPT Option OPT OPerational Pressure Transducer OPTB Operational Program Time Base OPTB Opposite OR Operations Room OR Operations Review OR Operations Requirement OR Outer Roll OR Oxygen Relief OR OPerational Right ORB "Orbit, Orbital, Orbiter" ORB Order ORB 1 -g Orbiter one-g (trainer) ORCHIS Oak Ridge Computerized Hierarchical Information ORCHIS System ORD Operational Requirements Document ORD Operational Readiness Date ORD Operational Ready Data ORD Ordnance ORD Orbital Requirements Document ORDC Orbiter Data Reduction Center ORE On-Orbit Repair Experiment ORF Orifice ORG Organization ORI Operational Readiness Inspection ORIDE Override ORIEN Orientation ORIG Origin ORLA OPtimum Repair Level Analysis ORP OFS Retransmission Processor ORR Operational Readiness Review ORR Operations Requirements Review ORS "Orroval Valley, Australia (STDN)" ORS Orbital Refueling System ORSDI Oak Ridge Selective Dissemination of Information ORT Orbit Readiness Test ORT Operational Readiness Test ORTHOG Orthogonal OSA Operational Support Area OSDH Orbiter System Definition Handbook OSE Orbiter Support Equipment OSE Operating SupPort Equipment OSF Office of Space Flight (now OSTS) OSF Ordnance Storage Facility OSHA Occupational Safety and Health Act (Activity) OSHA Occupational Safety and Health Administration OSLM Operations ShOP/Lab Manager OSMP Operational SuPport Maintenance Plan OSOP Orbiter Systems Operating Procedures OSP Operations Support Plan OSR Operations Support Room OSSA Office of Space Science and Applications OSSRH Orbiter Subsystem(s) Requirements Handbook OST Orbiter SuPport Trolley OST Operations Support Team (GSFC) OSTA Office of Space and Terrestrial Application(s) OSTDS Office of Space Tracking and Data Systems OSTO Office of Space Transportation Operations OSTP Orbiting System Test Plan OSTS Office of Space Transportation Systems OT Operational instrumentation MDM-Tank OT Out Temperature OT Operating Time OT Overti me OT Operational Trajectory OT Operational Test OT Optical Tracker OT&E Operational Test and Evaluation OTA Optical Telescope Assembly OTB Orbiting Tanker Base OTBD Outboard OTC Orbiter Test Conductor OTD Operational Technical Documentation OTD Orbiter Test Director OTDA Office of Tracking and Data Acquisition (now OSTDS) OTEMP Overtemperature OTH Over-the-Horizon (.Radar) OTK Oxidizer Tank OTL Ordnance Test Laboratory OTLC Orbiter Timeline Constraints OTO One-Time-Only OTOS Orbit-to-Orbit Stage OTP Operations Turnaround Plan OTP Operations Test Plan OTP OPerational Test Procedure OTR Outer OTR Operating Time Record OTS Orbiter Test Conductor OTS Off-the-Shelf OTT Optional Team Targeting OTV Operational Television OTV Orbiter Transfer Vehicle OTV Orbital transfer vehicle OTY Quantity OUP OFS UPlink Processor OUT Orbiter Utilities Tray OUT Output OUT Outlet OUTBD Outboard OV Orbiter vehicle OVBD Overboard OVF Overfill OVFL Overf low OVHD Overhead OVHT Overheat OVLD Overload OVRD Override OWD One-Way Doppler OWDE One-Way Doppler Extraction OWF OPtimum Working Frequency OXD "Oxide, Oxidizer" OXDZR Oxidizer OXID Oxidizer OXY Oxygen Oil Operations Integration Instruction [P] P&FS Particles and Fields Subsatellite P&I Performance and Interface (Specification) P&M Pulse Modulation P&M Processes and Materials P&M Planetary Mission P&M Preventive Maintenance P&M Program Milestone P&M Performance Monitor P&M Phase Modulation (Modulated) P&R Performance and Resources P&SM Procurement and Subcontract Management P-P Peak-to-Peak (Value) P-TUBE Pneumatic Tube P/A Problem Analysis P/B Pushbutton P/B Preburner P/C Pitch Control P/L Payload P/L Postlanding P/L Parts List P/L Purchased Labor P/N Part Number P/P Patch Panel P/P Printer/Plotter P/PL Primary Payload P/S Payload Specialist P/S Parallel to Serial Converters P/Y Pitch/Yaw PA Pad Abort PA Paging and Area Warning PA Power Amplifier PA Product Assurance PA Public Address PA Public Affairs PA Pulse AmPlifier PAC Pressure Alpha Center PAC Probe Aerodynamic Center PAC Problem Action Center PACAS Personnel Access Control Accountability System PACC Problem Action Control Center PACE Prelaunch Automatic Checkout Equipment PACS Pointing and Attitude Control System PAD Preliminary Advisory Data (Crew Data Uplink) PAD Program Approval Document PAD Propellant Acquisition Device PAE Problem Assessment Engineer PAE Preventive Action Engineer PAF Peak Annual Funding PAF Payload Attach Fitting PAF Payload attach fitting PAFB Patrick Air Force Base PAH PaYload Accommodations Handbook PAL APA Indonesian Communications Satellite PALS Photo Area and Location SYstem PALS Precision Approach and Landing SYstem PAM Pulse Amplitude Modulation PAM Payload Assist Module PAM Pulse Amplifier Modulation PAM Payload assist module PAM-A "PAM, Atlas-Centaur Class Spacecraft" PAM-D "PAM, Delta Class Spacecraft" PAMB Pressure Ambient PAO Public Affairs Office (Officer) PAP Product Assurance Plan PAPI Precision Approach Path Indicator PAR Product Acceptance Review PAR Problem Action Record PAR Precision Approach Radar PAR Planning Action Request PAR Problem Action Request PAR Problem Accountability Record PARA Paragraph PARAM Parameter PARS Property Accountability Record System PAS Primary Ascent System PAS Payload Accommodation Studies PASS Primary Avionics Software System PASS Planning and Scheduling System PASS Primary avionics software system PAT Production Acceptance Test PAT Problem Action Team PATP Preliminary Authority To Proceed PATS Program for Analysis of Time Series PAU Probe Aerodynamic Upper PAV Pressure Actuated Valve PAX Passengers PAYCOM Payload Command PAYDAT Payload Data PB Playback PB Preburner (P/B preferred) PB Pushbutton PB Phonetically Balanced PB Playback PBAN Polybutadiene Acrylonitrile (Propellant) PBD Payload Bay Door PBDF Payload Bay Door FWD PBDM Payload Bay Door Mechanism PBI Push Button Indicator PBI Push button indicator PBIC Programmable Buffer Interface Card PBIM Programmable Buffer Interface Module PBK Payload Bay Kit PBL Payload Bay Liner PBM Program Business Management PBPS Post-Boost Propulsion System(s) PBS Protective breathing system PBW Proportional Band Width PC Pulsating Current PC Plane Change PC Printed Circuit (Card) PC Chamber Pressure PC Pitch Control PC Project Control PCA Power Control Assembly PCA Point of Closest Approach PCA Pitch Control Assembly PCA Pneumatic Control Assembly PCA Power controller assembly PCA Pneumatic control assembly PCB Power Circuit Breaker PCB Product Configuration Baseline PCB Printed Circuit Board PCB Power Control Box PCC Pad Control Center PCC Payload Control and Checkout PCC Production Control Centers PCCB Program Configuration Control Board PCCE Payload Common Communication Equipment PCCM Program Change Control Management PCCN Provisioning Contract Control Number PCCP Preliminary Contract Change ProPosal PCD Procurement Control Document PCDU Payload Command Decoder Unit PCEM Propulsion Contamination Effects Module PCF Payload Control Facility PCG Phonocardiogram PCI Product Configuration Identification PCI Procedure Change Unit PCI Program Control Input PCI Peripheral Controller Interface PCIL Pilot-Controlled Instrument Landing PCIN Program Change Integration PCIN Program Change Identification Number PCL Primary Coolant Loop PCL Pallet Coolant Loop PCL Power Control List PCL Primary Coolant Line PCL Programming Check List PCM Pulse Code Modulation PCM Power Control Mission PCM Punch Card Machine PCM Pulse Code Modulator PCM Pulse code modulation PCM E Pulse-Code Modulation Event PCMD "Pulse-Code Modulation, Digital" PCMMU Pulse-Code Modulation Master Unit PCMMU PCM Master Unit PCMMU Pulse code modulation master unit PCMS Pulse-Code Modulation Shared PCN Program Change Notice PCN Program Control Number PCN Page Change Notice PCO Postcheckout operations PCO Program Controlled Output PCO Procuring Contracting Officer PCO Postcheckout PCOT Payload Center Operations Team PCP Project Change Proposal PCP Project Cost Plan PCP Power Control Panel PCP Program Change Proposal PCR Payload Checkout Room PCR Payload Changeout Room PCR Publication Change Request PCR Project Control Room PCR Program Change Request PCR Power Change Request PCR Payload changeout room PCRB Operations) PCRB Program Change Review Board (RI Launch PCS Pointing Control System PCS Primary Coolant System PCS Pressure Control System PCS Payload Control Supervisor PCS Payload Checkout System PCS Power Conversion System PCS Procedure Completion Sheet PCT Percent PCTE Portable Commercial Test Equipment PCTO Payload Cost Tradeoff Optimization PCTR Pad connection terminal room PCU Payload Checkout Unit PCU Power Control Unit PCU Pressure Control Unit PCU Process Control Unit PCV Precheck Verification PCV Purge Control Valve PCVB Pyro Continuity Verification Box PCVL Pilot Controlled Visual Landing PCZ Physical Control Zone PD Propellant Dispersal PD Project Directive PD Program Directive PD Procurement Drawing PD Procurement Document PD Preliminary Design PD Pitch Down PD&RS Payload Deployment and Retrieval Subsystem PDA Propellant Drain Area PDAR Program Description and Requirements PDB Power Distribution Box PDB Performance Data Book PDC Procurement Document Change PDC Predefined Command PDCR Proprietary Data Control Record PDCS Power Distribution and Control System (Subsystem) PDF Pocket dosimeter FEMA PDH Pocket Dosimeter-High PDH Pocket dosimeter high PDI Payload Data Interleaver PDI Payload DePloyment and Retrieval System PDL Pocket Dosimeter-Low PDL Procedure Distribution List PDL Program Design Language PDL Pocket dosimeter low PDM Processor Data Monitor PDM Pulse Duration Modulation PDM/FM Pulse Duration Modulation/Frequency Modulation PDP Project Definition Phase PDP Plasma Diagnostics Package PDP Postinsertion Deorbit Preparation PDP Preliminary Definition Plan PDP Procurement Data Package PDP Program Development Plan PDR Preliminary Data Requirements PDR Preliminary Design Review PDR Processed Data Recorder PDR Program Design Review PDR Program Director's Review PDRD Procurement Data Requirements Document PDRL Procurement Data Requirements List PDRM Payload Deployment and Retrieval Mechanism PDRS Payload Deployment and Retrieval System(s) PDRS Payload Data and Retrieval System PDRS Payload deployment and retrieval system PDRSS Payload Development and Retrieval System Simulator PDRSTA Payload Deployment and Retrieval System Test Article PDS Power Distribution System (Subsystem) PDS Package Data System PDS Partitioned Data Set PDS Problem Data System PDU Pilot Display Unit PDU Power Drive Unit PDU Pressure Distribution Unit PDU Pulse Detection Unit PDU Power drive unit PDV Pressure Disconnect Valve PE Project Engineer PEAP Personal egress air pack PEB Performance Evaluation Board PED Pedal PED Pedestal PEFO Payload Effects Follow-on Study PEG Powered explicit guidance PEIR Project Equipment Inspection Record PEM Plant Engineering and Maintenance PEN Penicillin PEP Power Extension Package PER Perigee PER Period PER Preliminary Engineering Report PERF "Perform, Performance" PERM Permanent PERT Program Evaluation Review Technique PET Phase Elapsed Time PETA Performance Evaluation and Trend Analysis PETB Preflight Test Bus PETN Petaerythrite Tetranitrate PETS POCC Experiments Timeline System (GDSD and Spacelab PETS P/L Experiment Test System (KSC) PETS Payload Environmental Transportation System PF Payload Forward PF Payload Operational Instrumentation MDM-FWD PF Parachute Facility PF Payload Function PF Power Factor PF Powered Flight PF Preflight PF Prime Function PF Probability of Failure PF Pulse Frequency PFA Palmdale Final Assembly PFB Pressure Fed Booster PFB Position Feedback PFB PaYload Forward Bus PFB Payload Feedback PFC Preliminary Flight Certification PFC Performance Flight Certification PFC Postflight Checklist PFC Power Factor Corrector PFCF Payload Flight Control Facility PFCS Primary Flight Control System PFK Payload Function Key PFL Primary Freon Loop PFM Pulse Frequency Modulation PFM Platform PFP Prograin Financial Plan PFP Programmable Function Panel PFR Portable Foot Restraint PFRT Preliminary Flight Rating Test PFRX "Preflight Relmat (X- 1,2,3 ... 9 or A,B,C. . Z)" PFS Primary Flight System PFS Percent Full Scale PFTA PaY[oad Flight Test Article PG Pressure Gage PG Power Generation PGA Power Generating Assembly PGA Pressure Garment Assembly PGA Programmable Gain Amplifier PGDCS "Power Generation, Distribution, and Control" PGDCS Subsystem PGE Purge PGHM Payload Ground Handling Mechanism PGHM Payload ground handling mechanism PGM Program (able) PGNCS Primary G&N and Control System (Subsystem) PGOR Payload Ground Operation Requirements PGORS Payload Ground Operations Requirements Study PGR SPacelab Planning and Ground Rule PGRWG Payload Ground Requirements Working Group PGS Power Generation Subsystem PGSE Payload Ground Support Equipment PGU Plant Growth Unit PGWG Particles and Gasses Working Group PH Personal Hygiene PH Phase PHA Preliminary Hazard Analyses PHF Personal Hygiene Facility PHF Payload handling fixture PHK Personal Hygiene Kit PHM Per Hundred Million PHMC Probe Heater Motor Controller PHOTO Photograph PHP Payload Handling Panel PHR Payload Hazardous Report PHS Payload Handling Station PHSF Payload Hazardous Servicing Facility PI Payload interrogator PIA Project Impact Analysis PIA Preinstallation Acceptance PIAR Project Impact Analysis Report PIB Pyrotechnic Installation Building PIC Programmable Interval Clock PIC Preinstallation Checkout PIC Payload Integration Committee PIC Pyro Initiator Capacitors PIC Pyro Ignition Control PIC Pyro Initiator Controller PIC Pyrotechnic Initiator Controller PIC Payload Integration Center PIC Pyro initiator controller PICP Program Interface Control Plan PICRS Program Information Coordination and Review PICRS Service PICRS Program Information Control and Retrieval System PICS Predefined Input Control Sequence PICS Photo Index and Cataloging System PID Payload Insertion Device PID Program Information Document PID Program Introduction Document PIDA Payload Installation and Deployment Aid PIDS Portable Image Display System PIE P/L Integration Equipment PIECP Preliminary Impact Engineering Change Proposal PIF Payload Integration Facility PIGA Pendulous Integrating Gyro Accelerometer PIIN Procurement Instrument Identification Number PIM Pulse Interval Modulation PIND Particle Impact Noise Detection PIO Payload Integration Plan PIO Pilot-Induced Oscillation PIO Public Information Office PIP Payload Integration Plan PIP Payload Interface Plan PIP Plant Instrumentation Program PIP Production Instrumentation Package PIP Project Implementation Plan PIPA Pulse Integrating Pendulum Assembly PIPA Pulse Integrating Pendulum Accelerometers PIRN Preliminary Interface Revision Notice PIT Preinstallation Test PITG Payload Integration Task Group PITS Payload Integration Test Set PIU Power Interface Unit PIU Pyrotechnic Initiator Unit PIV Peak Inverse Voltage PK Peak (Valve) PK/PK Peak to Peak PKD Programmable Keyboard and Display PKG Package PKM Perigee Kick Motor PKT Pocket PL Postlanding (P/L preferred) PL Prelaunch PL Plate PL Plug PL Payload (P/L preferred) PL Payload PL/SNSR Payload Sensor PLA Parachute Location Aid PLACE Position Location Aircraft Communications PLACE Equipment PLAT Platform PLB Payload Bay PLB Payload bay PLBD Payload BaY Door(s) PLBK Playback (PB preferred) PLD Program Listing Document PLDI Payload Data Interleaver PLDM Payload Management PLDS Payload Support PLGSS Payload Ground Support Systems PLH Payload Handling PLI Payload Interrogator PLISN Provisioning List Item Sequence Number PLL Phase Locked Loop PLM Payload Management PLM Payload Monitoring PLMS Program Logistics Master Schedule PLN Plan PLN Program Logic Network PLRD Payload Requirements Document PLRV Payload Launch Readiness Verification PLS Propellant Loading System PLS Payload Systems PLS Post Landing and Safing PLS Preliminary Landing Site PLS Primary Landing Site PLSL Propellants and Life Support Laboratory PLSP Payload Signal Processor PLSP Payload signal processor PLSS Portable Life Support Subsystem PLSS Primary Life SuPport Subsystem PLSS Portable life support system PLT Pilot PLTS Precision Laser Tracking System PLUM Payload Umbilical Mast PLV Postlanding Vent PLVC Postlanding Vent Control PM Preventive Maintenance PM Project Manager PM Payload Management PM Performance Monitor PM Phase Modulation PM PMAT Page Map Address Table PM Payload Midbody PM Pulse Modulation PM PMA Performance Monitor Annunciator PM PMAD Performance Monitor Annunciation Driver PM Power Management and Distribution PM PMAP Performance Monitor Annunciation Panel PM "Phase modulation, phase modulated" PMC Procurement Method Code PMC Payload Monitoring and Control PMC Plutona-Molybdenum Cermet PMC Postmanufacturing Checkout PMC Private Medical Communication PMD Palmdale (TACAN Station) PMD "PMDL Palmdale, California" PMEL Precision Measurements Equipment Laboratory PMF Performance Monitor (Monitoring) Function PMF Perigee Motor Firing PMF Program Management Facility PMHL Preferred Measurement Hardware List PMI Preventive Maintenance Inspection PMI Preventive Maintenance Instruction PMI Principal Maintenance Inspector PMIA Parallel Multiplexer Interface Adapter PMIR Program Manager's Integration Review PMIS Personnel Management Information System PML Preliminary Materials List PMM Property Management Manual PMN Program Management Network PMOM Performance Management Operations Manual PMON Performance Management Operations Network PMP Premodulation Processor PMP Performance Management Package PMP Pump PMP Program Management Plan PMP "Parts, Materials, and Processes" PMPL Preferred Mechanical Parts List PMR Performance Measurement Report PMR Program Manager's Review PMS Performance Monitoring System PMS Performance Management System PMS Performance Measurement System PMT Production Monitoring Test PMT Planning/Management Team PMTC Pacific Missile Test Center PMU Pulse Modulation Unit PMU PCM Master Unit PMU Pressure Measuring Unit PN Part Number (P/N preferred) PN Pseudo Noise PN Pseudo-Random Noise PNEU Pneumatic PNL Panel PNP Prenegotiation Position PO Personnel Office (KSC Directorate) PO Postorbit PO Purchase Order POA Plan of Action POCC Payload Operations Control Center POCC Payload Operations Control Center POCN Purchase Order Change Notice POD Payload Operations Division (JSC) POE Proximity OPticai Device POGO Polar Orbiting GeophYsical Observatory POGO P090 Suppression System POGO Pilot Operational EquiPment POI Propellant Quantity Indicator POI Product of Inertia POL "Petroleum, Oil, and Lubricants" POLAR Production Order Location and Reporting POM Pallet-Only Mode POM Printer OutPut Microfilm POMT Planning Operations Management Team POP Program Operating Plan POP Perpendicular-to-Orbit Plane POP Preburner Oxidizer Pump POP Preflight Operations Procedures POP Prelaunch Operations Plan POPA PaYload Ordnance Processing Area POPU Push Over Pull Up POR Purchase Order Request POR Point of resolution PORB Production Operations Review Board PORCN Production Oi-der Records Change Notice PORD Performance and 0iperations Requirements Document PORR Preliminary Operat ons Requirements Review PORT Portable POS Pacific Ocean Ship POS Position POS Portable Oxygen System POS Portable oxygen system POST Program to OPtimize Simulated Trajectories POST Positive POST Payload Operations SuPport Team POT Potentiometer POT Potable POV Pneumatic Operated Valve POV Peak Operating Voltage POWS Project Operating Work Statement PPB Program Performance Baseline PPB Parts per Billion PPC Phased Provisioning Code PPC PreProcessing Center PPCO2 Partial Pressure CO2 PPEP Plasma Physics and Environmental Perturbation PPF Payload Processing Facility (USAF) PPH Pounds per Hour PPI Plan Position Indicator PPI Pulse Position Indicator PPIL Priced Provisioned Item List PPL Provisioning Parts List PPL Priced Parts List PPL Planning Parts List PPM Parts per Million PPM Part per Minute PPM Pulse per Minute PPM Pulse Position Modulation PPM E Pacific Plate Motion Experiment PPO2 Partial Pressure 02 PPO2 Oxygen partial pressure PPP Payload patch panel PPR Payload Preparation Room PPS Pneumatic Power Subsystem PPS Printer/Plotter System PPS Provisioning Performance Schedule PPS Pulse Per Second PQGS Propellant Quantity Gaging System PR Procurement Requisition PR Pressure Regulator PR Procurement Regulation PR Purchase Request PR Pressure PR Pulse Rate PR Problem Report PR Pressure Ratio PR Primary PR Position Record PR Pair PR Performance Report PRACA Problem Reporting and Corrective Action PRB Parachute Refurbishment Building PRB Project Review Board PRB Paso Robles (TACAN Station) PRB Panel Review Board PRC People's Republic of China Satellite PRC People's Republic of China (Payload) PRC Planning Research Corporation PRCA Problem Reporting and Corrective Action PRCB Program Requirements Change Board PRCB Program Requirements Control Board PRCB Program Review Control Board PRCBD Program Requirements Control Board Directive PRCBD Program Review Control Board Directive PRD Program Requirements Documents (UDS) PRD Procurement Regulation Directive PRD Personal Radiation Dosimeter PRD Procurement Requirements Document PRE Personal Rescue Enclosure PRE-MOD Premodulation PREAMP Preamplifier PREF Preference PREFLT Preflight PREL Preliminary PREP Preparation PREP Prepare PRES Present PRESS Pressure PRESS Pressurant PREV Previous PREVLV Prevalve PRF Parachute Refurbishment Facility PRF Pulse Repetition Frequency PRI Primary PRIM Primary PRL Priority Rate Limiting PRL Page Revision Log PRL Priority rate limiting PRM Pulse Rate Modulation PRM Posigrade Rocket Motor PRM Payload Retention Mechanism PRN Program Release Notice PRN Pseudo-Random Noise PRN Pulse Range Navigation PRO Proceed PROB Problem PROC Procurement PROC Procedure PROC "Processor, Process" PROG Progress PROG Program PROJ Project PROM Programmable Read-Only Memory PROM Progammable read-only memory PROP Propulsion Engineer PROP Propulsion PROP Proportioning PROP Propellant PROPLT Propellant PROX Proximity PRP Personnel Reliability Program PRPS Programming Requirements Process Specification PRR Pulse Repetition Rate PRR Program Requirements Review PRR Parts Replacement Request PRR Preliminary Requirements Review PRS Personnel Rescue Service PRS Personnel Rescue System PRS Power Reactant System (Subsystem) PRS Payload Retention Subsystem PRS Primary Recovery Site PRS Primary Rescue Site PRS Precision Ranging System PRS Provisioning Requirements Statement PRSD Power Reactant Supply and Distribution PRSD Power Reactant Storage and Distribution PRSD Power reactant storage and distribution PRSDS Power Reactant Storage and Distribution System PRSS Problem Report Squawk Sheet PRT Pulse Repetition Time PRTLS Powered Return to Launch Site PRV Pressure Reduction Valve PS Payload Station PS Payload Support PS Power Supply PS Pressure Switch PS Prime Select PS Payload Specialist PS Parachute Subsystem PS/FC Power Supply/Fuel Cell PSA Pre/Post Sleep Activity PSA Preferred Storage Area PSA Pressure Switch Assembly PSA Provisions Stowage Assembly PSA Power Servo Assembly PSA Payload Support Avionics PSA Payload Service Area PSA Power Servo Am pl if ier PSAC Presidential Scientific Advisory Committee PSC Parallel Switch Control PSC Program Schedule Chart PSCL Propellant Systems Cleaning Laboratory PSCN Preliminary Specification Change Notice PSD Program Support Document PSD Power Spectral Density PSD R Planning and Scheduling Document Record PSDP Payload Station Distribution Panel PSE Payload Support Equipment PSE Peculiar Support Equipment PSE Payload Service Equipment PSE Payload Servicing Equipment PSF Processing and Storage Facility (ET) PSF Processing and Staging Facility (SRB) PSFC Power Supply/Fuel Cell PSG Power Subsystem Group PSI Power Static Inverter PSIG Propulsion Systems Integration Group PSK Phase Shift Keyed PSL Propellant Seal PSL Pressure Seal PSM Propellant Storage Module PSM Phase Sensitive Modulator PSM Pyro Substitute Monitor PSOP Payload Systems Operating Procedures PSP Project Schedule Plan PSP Program Support Plan PSP Payload Signal Processor PSP Payload Specialist Panel PSP Payload Support Plan PSP Payload signal processor PSPA Pressure Static Probe Assembly PSPL Priced Spare Parts List PSR Program Status Review PSRD Program Support Requirements Document PSS Propulsion Support System PSS Pad Safety Supervisor PSS Payload Specialist Station PSS Payload Support System PSS Propellant Supply Subsystem PSSP Payload Specialist Station Panel PSST Periodic Significant Scheduled Tasks PSSU Patch Survey and Switching Unit PSU Power Switching Unit PSV Planetary Space Vehicle PSW Program Status Word PT Advanced Planning and Technology Office (KSC Dir.) PT Pint PT Pitch Trim PT Point PT Pressure Transducer PTA Propulsion Test Article PTA Positest Analysis PTA Potential Toxic Area PTB Payload Timing Buffer PTC Portable Temperature Controller PTC Passive Thermal Control PTC Passive thermal control PTC R Pad Terminal Connection Room PTCS Passive Thermal Control Section PTCS Passive Thermal Control System PTCS "Planning, Training, and Checkout System" PTCS Propellant Tanking Computer System PTD Provisioning Technical Documentation PTDDSS PTD Data Selection Sheet PTI Preliminary Test Information PTI Programmed Test Input PTIS Program Test Input System PTM Pulse Time Modulation PTMS Precision Torque Measuring System PTO Participating Test Organizations PTO Power Test Operations PTP Point-to-Point Phone(s) PTR Preliminary Test Report PTR Printer PTR Program Trouble Report PTS Payload Transportation System PTS Payload Test Set PTT Push-to-Talk PTT Push to talk PTV Pathfinder Test Vehicle PU Propellant Unit PU Pickup PU Power Unit PU Propellant Utilization PUB Publication PUCS Propellant Utilization Control System PUGS Propellant Utilization and Gaging System PUPO Pull Up Push Over PUSS Pallet Utility Support Structure PUV Propellant Utilization Valve PV Prevalve PV&D "Purge, Vent, and Drain" PVA Preburner Valve Actuator PVA Propellant Valve Actuator PVD "Purge, Vent, Drain System" PVR Precision Voltage Reference PVRD "Purge, Vent, Repressurize, and Drain" PVRO Pyrotechnics PVT Preflight Verification Test PVT "Pressure, Volume, and Temperature" PVT Pressure/Volume/Temperature PVT Private PVT Pyrotechnic Verification Test PVWA Planned Value of Work Accomplished PVWS Planned Value of Work Scheduled PW Pulse Width PWA Private Write Area PWA Pratt and Whitney Aircraft PWA Product Work Authorization PWB Printed Wire Board PWBS Program Work Breakdown Structure PWM Pulse-Width Modulation PWMD Printed Wiring Master Drawing PWR Power PWS Pricing Work Statement PYRO Pyrotechnics Pc Chamber pressure Perigee Al Perigee Altitude Pi Procurement Item Pi Program Introduction Pi PaYload Interrogator Pi Pen and Ink (Document Update) Pi Principal Investigator Pi Preliminary Investigation Pil Procurement Instrument Identification Poc Purchase Order Closeout Poc PaYload Operations Center [Q] Q Dynamic Pressure Q Pitch Rate (Angular Rate) Q Alpha Pitch Dynamic Pressure Q Beta Yaw Dynamic Pressure QA Quality Assurance QACAD Quality Assurance Corrective Action Document QAM Quality Assurance Manual QAP Quality Assurance Procedure QAR Quality Assurance Responsible/Witness QATT Qualification for Acceptance Thermal Testing QAVT Qualification for Acceptance Vibration Testing QAVT Qualification Acceptance Vibration Test QCB Queue Control Block QCDR Quality Control Deficiency Report QCOP Quality Control Operating Procedure QD Quick Disconnect QD Quick disconnect QDR Qualification Design Review QDS Quality Data System QE Quality Engineer QEC Quick Engine Change QL Quick Look QLDS Quick Look Data Station QLS Quick Look Station QM Qualification Motor QPL Qualified Products List QPL Qualified Parts List QPR Quarterly Progress Report QPRD Quality Planning Requirements Document QPS Quality Planning Specification QPS Quantity Planning Specification QPSK Quadrature Phase Shift Key QRE Quick-Reaction Estimate QRI Quick-Reaction Integration QRIA Quick-Reaction Integration Activity QRS Quick-Reaction Sortie QRSL Quick-Reaction Space Laboratory QSA Qualification Site Approval QSGVT Quarter Scale Ground Vibration Test QSL Qualified Source List QSM Quarter Scale Model QSMVT Quarter Scale Model Vibration Testing QSS Quindar Scanning System QT Qualification Test QTP Qualification Test Plan QTR Qualification Test Report QTR Quarter QTRS Quarters QUAD "Quandrangle, Quadrant, Quadrature" QUADS QualitY Achievement Data SYstem QUAL Quality QUAL "Qualification, Qualified" QUAT Quaternion QUIC Quality Data Information and Control QUP Quality Unit Pack QVT Qualified Verification Testing QVVT Qualified Verification Vibration Testing [R] R Rankine R Rear R Receive R Range Rate R Roentgen R Replace R Resistance R Yaw Rankine Rate R Roll R Gas Constant R Radius R Range R Rehydratable R Regulate R Ratio R Right R Reliability R Redundant R LEO Request Liaison Engineering Order R LSS Regenerative Life Support System R BAR Radius Vector Axis R DOT "Range Rate to Target, Opening, Closing" R ETS Reconfiguration Electrical Test Stand R ETS Reconfigurable Electrical Test Stand R IMP Minimum Range to Avoid Plum Impingement R&CC Recorder and Communication Control R&D Research and Development R&DO Research and Development Operations (MSFC) R&OA Reliability and Quality Assurance R&P Reserve and Process R&PM Research and Program Management R&R Remove and Replace R&R Rendezvous and Recovery R&Z Range and Zero R-T Resistance Test R/A Radar Altimeter R/C Remote Control R/C Rate of Climb R/C Radio Command R/D Rate of Descent R/E Reentry R/I Receiving Inspection R/L Rate/Limited R/L Remote/Local R/O Rollout R/S Redundant Set R/S Range Safety R/T Receiver/Transmitter R/T Real Time R/W Runway R/W Read/Write RA Right Ascension RA Right Aft RA Range Area RA Radar Altimeter (R/A preferred) RA Radar altimeter RAAB Remote Amplifier and Adoption Box RAAB Remote Application and Advisory Box RAAB Remote amplifier acquisition and advisory box RAC ReliabilitY Action Center RACS "Rotation Axis Coordin,,te System" RACS Remote Automatic Calibration System RACU Remote Acquisition and Command Unit RAD Radar RAD Radian RAD Roentgen Absorbed Dosage RAD Radius RAD Radiation Dosage RADAR Radio Detecting and Ranging RADCC Radiation Control Center RAE Radio Astronomy Explorer RAF Requirements Analysis Form RAG Reusable Agenda RAHF Research Animal Holding Facility RAI Rofl Attitude Indicator RAI Radar Altimeter Indicator RAL ResPonsibiiitV Aslignment List RALPH Reduction and Acquisition of Lunar Pulse Heights RALT Radar Altimeter RAM Random Access Memory RAM Responsibility Assignment Matrix RAM Research and Applications Module RAM Radar Absorption Material RAM Random-access memory RAMA Recap and Movement Authorization RANC Radar Absorption Noise and Clutter RANN Research Applied to National Needs RAPCON Radar Approach and Control RAPS Right AFT Propulsion System RAS Requirements Allocation Sheet RATCC Radar Air Traffic Control Center RAU Remote Acquisition Unit RAU Remote acquisition unit RAUIS Remote Acquisition Unit Interconnecting Station RAX Remote Access Terminal RAX Remote Access Computing System RB Radar Beacon RBA Radar Beacon Antenna RBC Red Blood Cells RBC Rotating Beam Ceilometer RBDE Radar Bright Display Equipment RBE Radiation Biological Effectiveness RBK Right Bank RBL Right Buttock Line RBMT Retrospective BibliographieS on Magnetic Tape RBN Radio Beacon RC Reverse Current RC Recurring Cost RC Rotation Control RC Resistance-Capacitance RC Range Command RC Rate Command RC Recovery Controller RCA Remote Control Amplifier RCA Radio Corporation of America (SATCOM) RCAG Remote Center Air-Ground RCAG Remote Control Air-Ground RCB Remote Circuit Breaker RCC RoLigh Combustion Cutoff RCC Reusable Carbon-Carbon RCC Reinforced Carbon-Carbon RCC Range Control Center RCC Range Commanders Council (DOD) RCC Reinforced carbon-carbon RCCA Rough Combustion Cutoff Assembly RCCB Remote Control Circuit Breaker RCCP Recorder and Communications Control Panel RCD Record RCDP Record Parallel RCDR Recorder RCHCS Regenerable CO and Humidity Contro SYstem RCN Requirements Change Notice RCP Right Circular Polarization RCP Radiation Constraints Panel RCP Right Circular Polarizer RCPT Receipt RCPT Receptacle RCR Retrofit Configuration Record RCS Reaction Control System (Subsystem) RCS Reaction control system RCSC Reaction Control subsystem Controller RCU Remote Control Unit RCV Receive RCVR Receiver RCVS Remote Control Video Switch RCVY Recovery RCY Remaining CYcles RCY Recovery RD Round RD Requirements Document RD Radiation Detection RD Reference Designator RD/SB Rudder Speed Brake RDA Remote Data Access RDA Resident Data Area RDC Request for Document Change RDC Reference Designator Code RDCS Reconfiguration Data Collection SYstem RDD Requirements Definition Document RDF Resource Data File RDF Radio Direction Finder RDM Real-Time Data Manager RDMTR Radiometer RDOC Reference Designation Overflow Code RDOUT Readout RDP Requirements Data Plan RDP Requirements Development Plan RDP Receiver and Data Processor RDR Rudder RDR Raw Data Recorder RDS Rocketdyne Digital Simulator RDT&E "Research, Development, Test, and Evaluation" RDTR Radiator RDW Return Data Words RDW Response Data Word RDX Cyclotrimethylenetrinitramine RDY Ready RE Responsible Engineer RE&T Research Engineering and Test REAC Reactant REACQ Reacquisition REC Record (RCD preferred) REC Receive RECERT Recertification RECHG Recharge RECIP Reci procate RECOG Recognition RECON Remote Console RECONFIG Reconfiguration RECONN Reconnaisance RECOV Recovery RECP Request for Engineering Change Proposal RECP Receptacle RECRC Recirculate RECS Representative Shuttle Environmental Control System RECT "Rectifier, Rectify" RECV Receive RECVR Receiver RED Reduction REDUN Redundancy REF "Refurbish, Refurbishment" REF Reference REFRIG Refrigerate REFURB Refurbish REG "Regulator, Regulate" REG Register REGEN Regenerate REI Range from Entry Interface (400 K) REI-N4 REI-N4011ite cation REIL Runway End Identification Lights REINF Reinforce REINIT Reinitialize REJ Reject REL Relative REM Release Engine Module REM Release Escape Mechanism REM Release Engine Mechanism REM Release-Engage Mechanism REN RAD Rendezvous Radar REND Rendezvous REO Require REO Request REOD Required REPL Replace REPR Repressurization REPRO Reproduction REQN4TS Requirements (RQN4TS preferred) RES Reservoir RES Reserve RESID Residual RESIS Resistance RESP Responsibility RESVR Reservoir RET Retract RETEN Retention RETRO Retrofire RETRO Retrofire Officer RETRO Retro Controller (NASA) RETRV Retrieve REV Revision REV Revolution REV Review REV Reverse RF Communications Support RF Radio Frequency RF Right Forward RF Radio frequency RF-TK Radio Frequency Tracking RFA RF Authorization (Frequency) RFA Request for Action RFB Request for Bid RFB Ready for Baseline RFC Request for Change Revolution RFC Request for Change RFC Radio Frequency Charts RFCP Request for Computer Program RFD Requirements Formulation Document RFE Request for Estimate RFEI Request for Engineering Information RFI Remote Facility Inquiry RFI Request for Information RFI Remote File Inquiry RFI Radio Frequency Interference RFL Reflect RFO Request for Order RFP Requirements and Formulation Phase RFP Request for Proposal RFPA Request for Proposal Authorization RFQ Request for Quotation RFT Ready for Training RFW Request for Waiver (Deviation) RG Radio Guide RG Rate Gyro RGA Rate Gyro Assembly RGA Rate gyro assembly RGAL Rate Gyro Assembly-Left SRB RGAO Rate Gyro Assembly-Orbiter RGAR Rate Gyro Assembly-Right SRB RGM Redundant Gyro Monitor RGP Rate Gyro Package RGRMA Rate Gyro Redundancy Management Algorithm RH Relative Humidity RH Right Hand RHC Rotation Hand Controller RHC Right Hand Circular RHC Rotational hand controller RHCM Relative Humidity Control/Monitor RHCP Right Hand Circular Polarization (Polarized) RHEB Right Hand Equipment Bay RHEO Rheostat RHFEB Right Hand Forward EquiPment Bay RHL Residual Hazards List RHM Relative Humidity Monitor RHP Right Hand Panel RHS Right Hand Side RHS Rocketdyne Hybrid Simulator RHSC Right Hand Side Console RHT Radiant Heat Temperature RHU Radioisotope Heater Unit RHW Router Header Word RIB Recoverable Item Breakdown RIB Right Inboard RIC Rockwell International Corporation RIC Resistance Inductance and Capacitance RICC Remote Intercomputer Communications Interface RID Review Item DisPosition RIDI Receiving Inspection Detail Instruction RIE Right Inboard Elevon RIF Relative Importance Factor RIG Rate Integration Gyro RIGI Receiving Inspection General Instruction RIL Reparable ltemlist RIL Repairable Item List RIL Recoverable Item(s) List(s) RIPS Radar Impact Prediction System RIR Reportable Item Report RIS Reporting Identification Symbols RISKAC Risk Acceptance RIT Request for Interface Tool RIU Remote Interface Unit RIV Recirculation Isolation Valve RJ/EC Reaction Jet/Engine Control RJC Reaction Jet Control RJD Reaction Jet Device RJD Reaction Jet Driver RJD Reaction jet driver RJDA Reaction Jet Driver Aft RJDF Reaction Jet Driver Forward RJEC Reaction Jet Engine Control RJOD Reaction Jet OMS Driver RK Recharge RL Return link RLA Repair Level Analysis RLA Repair Line Agreement RLC Remote Load Controller RLF Relief RLG Ring Laser Gyro RLT Return Line Tether RLY Relay RM Right Mid RM Reference Mission RM Rendezvous Maneuver RM Remote Manipulator RM Rescue Module RM Redundancy Management RM Redundancy management RM/MS&c Control RM/MS&c "Redundancy Management/Moding, Sequencing, and" RMA Renote Manipulator Arm RMC Redundancy Management Control RMF RCS Module Forward RMG Right Main Gear RMRS Repeatable Maintenance and Recall System RMS Radian Means per Second RMS Redundancy Management System RMS Remote ManiPulator System (SubsYstem) RMS Random Motion Simulator RMS Root-Mean-Square RMS Remote manipulator system RMSVp Remote ManiPulator SubsYstem Verification Plan RMT Remote RMi Radio Magnetic Indicator RN Reynolds Number RNDZ Rendezvous RNG Range RNG RT Range Rate RO Readout RO Recovery Operations RO Receive Only RO Radar Operator ROB Right Outboard ROC Record Of Comments ROC Request of Change ROD Remote Operated Door(s) ROLL Roll Angle ROM Rough Order of Magnitude ROM Read-Only Memory ROS Regulated Oxygen SYstem ROS "Rosman, North Carolina (STDN Site)" ROS Removable Overhead Structure ROS Regulated Oxygen Supply ROT "Rotate, Rotation" ROT Remaining Operating Time ROTI Recording Optical Tracking Instrument ROUT Rollout RP Relative Pressure RP Rocket Propellant RP Repair Period RPA Request for Procurement Action (Authorization) RPA Record and Playback Assembly RPC Remote Power Controller RPC Remote power controller RPE Reliability Project Engineer RPIE Real Property Installed Equipment RPL Rated Power Level RPL Rated power level RPLC Replace RPM Revolutions per Minute RPO Radiation Protection Officer RPOC Remote Payload Operations Center RPP Reinforced Pyrolytic Plastic RPS Record and Playback System (Subsystem) RPS Revolutions per Second RPSF "Rotation, Processing and Surge Facility" RPT Rudder Pedal Transducer RPT Resident Provisioning Team RPTA Rudder Pedal Transducer Assembly RPTA Rudder pedal transducer assembly RPV Remotely Piloted Vehicle RQ Respiratory Quotient RQMT Requirement RQMTS Requirements RR Respiration Rate RR Requirements Review RR Rendezvous Radar RR Range Rate RREA Rendezvous Radar Electronics Assembly RREU Rendezvous Radar Electronics Unit RRI Rendezvous Radar Indicator RRL Rudder Reference Line RRP Rudder Reference Plane RRT Rendezvous Radar Transducer RRT Rendezvous Radar Transponder RS Rawinsonde RS Redundancy Status RS Redundant Set RS Right Side RS Remote Station RS Refurbishment Spare RS Redundant set (computers) RS&H "Reynolds, Smith, & Hills, Inc." RS&S "Receiving, Shipping, and Storage" RSA Reference Satellite A RSB Rudder Speed Brake RSC Range Safety Control/Command RSCIE Remote Station Communication Interface Equipment RSD Requirements and Specifications Document RSDP Remote Site Data Processor RSF Receiving-Safing Facility RSF Refurbishment and Subassembly Facilities RSF Refurbishment and Subassembly Facility (KSC) RSI Reusable Surface Insulation RSL Resource Support List RSLV Resolve RSM Resume RSMM Redundant System Monitor Model RSO Radiological Safety Office RSO Range Safety Officer RSP Rendezvous Station Panel RSPL Recommended Spare Parts List RSS Root Sum Square RSS Range Safety Switch RSS Range Safety System RSS Reactants Supply System RSS Rib Structure Station RSS Rotating Service Structure RSS Range safety system RSS Rotating service structure RSSPO Resident Space Shuttle Project Office (Officer) RST Recessed Selectromatic Terminal RSTRT Restart RSU Remote Service Unit RSVR Reservoir RSYS Responsible System RT Receiver-Transmitter RT Right RT Reference Trajectory RT Real Time (R/T preferred) RT Rate RT Range-to-Target RTA Real-Time Accumulator RTAC Research and Technology Advisory Committee RTB Resistance Temperature Bulb RTC Real-Time Clock RTC Room Temperature Cure RTC Real-Time Computer RTC Real-Time Command RTC Real-time command RTCC Real-Time Command Controller RTCC Real-Time Computer Command (UPlink) RTCC Real-Time Computer Complex RTCC Real-Time Computer Center (NASA) RTCE Rotation/Translation Control Electronics RTCL Reticle RTCP Real-Time Communications Processor RTCS Real-Time Computer System RTD Real-Time Display RTD Rate Damping RTD Resistance Temperature Device RTE Responsible Test Engineer RTG Radi0isotope Thermal Generation RTG Radioisotope Thermoelectric Generator RTG Range (Slant) to Ground RTG Radioisotope thermoelectric generator RTHC Rotation-Translation Hand Controller RTHS Real-Time Hybrid System RTIF Real-Time Interface RTLS Return to Launch Site RTLS Return to launch site RTN Return RTO Responsible Test Organization RTOP Research and Technology Objectives and Plans RTR Rotor RTS Remote Tracking Station RTS Real-Time Supply RTSF Real-Time Simulation Facility RTTV Real-Time Television RTU Renote Terminal Unit RTV Room-Temperature Vulcanized RTV Room-temperature vulcanizing RU Remote Unit RUD Rudder RUPT Rupture RUPT Interrupt RUT Resource Utilization Time RV Relief Valve RV Reentry Vehicle RV Retrieval Vessel RV Recovery Vehicle RV Recirculation Valve RV Recovery Vessel RVCF Remote Vehicle Checkout Facility RVDT Rotary Variable Differential Transducer RVDT Rotary Variable Differential Transformer RVN Requirements Verification Network RVR Runway Visible (or Visual) Range RVS Reverse RW Response Word RWD Right Wing Down RWM Read/Write Memory RYD Real Year Dollars RZ Return-to-Zero Ra Radium Ri Rockwell International [S] S CHG Supercharge S PRES Star Present S TRK Star Tracker S&A Science and Application S&A Safe and Arm (Device) S&AD Science and Applications Directorate S&E Science and Engineering (MSFC Directorate) S-BD S-Band S-N Stress Number S/0 Shutoff S/0 Switchover S/8 Standby S/A Spacecraft Adapter S/A Safe and Arm S/A Scheduled/Actual S/A Site Activation S/A Subassembly S/AC Stabilization/Attitude Control S/C Stabilization and Control S/C Stripchart (Recorder) S/C Subcontractor S/C Splitter/Combiner S/C Software Contractor S/C Signal Conditioner S/C Sensor/Controller S/C Spacecraft S/EOS Standard Earth Observation Satellite S/F Safety Factor S/F Single Flow S/G Strain Gage S/L Shop/Laboratory S/M Scheduled Maintenance S/M Service/Maintenance S/M Structural/Mechanical S/M Systems management S/N Serial Number S/N Signal-to-Noise Ratio S/P Serial to Parallel S/P Signal Processor S/R Send and Receive S/R Shift Register S/R Stimulus/Response S/S Samples per Second S/S Single Sideband S/S Space Shuttle S/S Subsystem S/Sys Subsystem S/U Set Up S/V Space Vehicle S/V SuPply Valve S/W Software SA Safing Area SA Shaft Angle SA Single Access SA Site Activation SA Subaccount SA Supplemental Agreement SA Support Area SAA Safety Assurance Analysis SAA South Atlantic Anomaly SAAC Schedule Allocation and Control SAALC San Antonio Air Logistics Center SAAM Special Air Force Airlift Mission SAAMA San Antonio Air Material Area SAAS Shuttle Aerosurface Actuator Simulation SAB Shuttle Avionics Breadboard SAB Spacecraft Assembly Building SAB Storage and Assembly Building SAB SAC strategic Air Command (USAF) SACS SuPport Action Center SACS Software Avionics Command SuPport SACS Systems Software Avionics Command SuPport SACS SAD shuttle Authorized Document SACS Spacecraft Attitude Display SACS SYstems Allocation Document SADEC Spin Axis Declination SADEC SAE society of Automotive Engineers SADEC SAEF spacecraft Assembly and EncaPsulation Facility SADEC SAES SADEC stand-Alone Engine Simulator SADEC SAFE San Andreas Fault Experiment SAEF Spacecraft Assembly and Encapsulation Facility (KSC) SAG E Stratospheric Aerosol Gas Experiment SAG E SAIL Shuttle Avionics Integration Laboratory SAIL Shuttle Avionics Integration Laboratory (JSC) SAL Scientific Airlock SAL Shuttle Avionics Laboratory SAL SALC Sacramento Air Logistics Center SAM Shuttle Attachment ManiPulator SAM SYstem Activation and Monitoring SAM SAMP Shuttle Automated Mass Properties SAM SAMS Shuttle Attachment ManiPulator SYstem SAMSO Space and Missile SYstems Organization (USAF) SAMSOR SAMSO Regulation (now SDR) SAMTEC SPace and Missile Test Center (VAF CA) SAMTEC Space and Missile Test Center Manual SAMTO Space and Missi e Test Organization (VAFE3) SAND I SAP Site Activation Need Date SAR Strain Arrestor Plate SAR SafetY AnalYsis Report SAR Search and Rescue SARP Summary AnalYsis Report SARP SafetY AnalYsis RePort for Packaging SART Shuttle Astronaut Recruitment Program SAS Stimuli Analog Refresh Table SAS Solar Array SYstem SAS StabilitY Augmentation SubsYstem SAS StabilitY Augmented SYstem SASTP Stand-Alone Self-Test Program SAT "Saturate, Saturated" SAT Systems Approach to Training SATAF Shuttle Activation Task Force SATO Shuttle Attached Teleoperator SATO Supply and Transportation Operations SATS Shuttle Avionics Test System SATS Small Applications Technology Satellite SAU Signal Acquisition Unit SAU StraP Around Unit SAVER Shuttle Avionics Verification and Evaluation SAWD Solid Amine Water Desorbed SB Space Base SB Speed Brake SB Synchronization Base SB Synchronization Bit SBA Seat Back Assembly SBA Small Business Administration SBA Structure Borne Acoustic SBAS S-Band Antenna Switch SBC Speed Brake Command SBCR Stock Balance and Consumption Report SBD Schematic Block Diagram SBE Sub-Bit Encoder SBHC Speed Brake Hand Controller SBP San Luis Obispo (TACAN Station) SBP Sonic Boom Panel SBS Satellite Business System SBTC Speed Brake/Thrust Controller SBTC Speed brake/thrust controller SBX S-Band Transponder SC Scale SC Service Charge SC Signal Conditioner (S/C preferred) SC Statement of Capability SC Statement of Compatibility SC Support Contractor SC Surface Command SCA Schedule Change Authorization SCA Sequence Control Assembly SCA Shuttle Carrier Aircraft SCA simulation Control Area SCA Sneak Circuit Analysis SCA Shuttle carrier aircraft SCA Sequence control assembly SCAMA Station conferencing and monitoring arrangement SCAN Antenna Scan SCAN Selected Current Aerospace Notices SCAPE Self-Contained Atmospheric Protective Ensembly SCAPE Self-contained atmosphere protective ensemble SCARS Sneak Circuit Analysis Report Summary SCAS Subsystem COMPuter Application Software SCAT Space Communication and Tracking SCATS "Storage, Checkout, and Transport" SCB Specification Control Board SCB Simulation Control and Training SYstem SCB Schedule Change Board SCB Selection Control Board SCB Selector Control Box SCB Software Control Board SCBD Seller's Approved Configuration ase ine SCC Standard Cubic Centimeters SCC Safety Control Center SCC Simulation Control Center SCCB Site Configuration Control Board SCCH Standard Cubic Centimeters-per Hour SCD Source Control Document SCD Specification Control Document SCD Specification Control Drawing SCD Source Control Drawing SCDA "Safing, Cooldown, and Decontamination Area" SCDP Simulation Control Data Package SCDR Software Critical Design Review SCDR Shuttle Critical Design Review SCDR Seller Critical Design Review SCDR Subcontractor Critical Design Review SCDU Signal Conditioning and Display Unit SCE Signal Conditioning Equipment SCEA Signal Conditioning Electronics Assembly SCF Sequenced Compatibility Firing SCF Satellite Control Facility SCF Safing and DeServicing Facility SCF Sunnyvale Control Facility SCF Spacecraft Control Facility SCF Standard Charge Factor SCF Standard Cubic Feet SCF Statistical Collection File SCF Satellite Control Facility SCFH Standard Cubic Feet per Hour SCFM Standard Cubic Feet per Minute SCFS Standard Cubic Feed per Second SCGSS Super Critical Gas Storage System SCHED "Scheduled, Scheduling" SCHEM Schematics SCIT Standard Change Integration and Tracking SCL Specification Change Log SCL Secondary Coolant Loop SCL Secondary Coolant Line SCLM "Stability, Control, and Load Maneuvers" SCM Subsystem Configuration Monitoring SCM Subsystem Configuration Management SCM Site Configuration Message SCM System Control Module SCM System control module SCMB Development Configuration Management Board SCMP System Contractor Management Plan SCN Specification Change Notice SCNP Preliminary Specification Change Notice SCNR Scanner SCOE Special Checkout Equipment SCP Scanner Control Power SCP Specific Candle Power SCR Schedule Change Request SCR Stripchart Recorders SCR Software Change Request SCR Sneak Circuit Report SCRG SYstem Change Review Group (MSFC) SCRL Station Configuration Requirement List SCRS Stripchart Recording System SCRS Serialized Control and Reporting System SCRSY Serialized Control and Record SYstem SCSG Strain gauge signal conditioner SCT Scanning Telescope SCU Signal conditioner unit SCiM Standard Cubic Inches per Minute SCiU Spacecraft Interface Unit SCiU Selector Control Interface Unit SD Scaling and DisPlay SD Smoke Detector SD Space Division (AFSC) SD Space Division (Rockwell) SD Spare DisPosition SD Specification Document SD L Standard Distribution List SD L Software Development Laboratory SD/FS Smoke Detector/Fire SuPpression SD/FS SuPPlier Documentation SD/YVV SD/Launch Base Div['si'on SDA Shaft Drive Axis SDAF Solid Rocket Booster Disassembly Facility SDAF Source Data Automatic)n SDB Shallow Draft Barge SDC Shallow Draft Board SDC Software DeveloPment COmPuter SDC Spares DisPosition Code SDCL SuPPlier Documentation Checklist SDCP Summary DeveloPment Cost Plan SDCS SAIL Data Communications SYstem SDD System Design Document SDD Software Design Document SDD Software DescriPtion Document SDD Shuttle Design Directive SDE Space Division Evaluator SDF System Development Facility (Breadboard) SDF Software Development Facility SDF Single Degree of Freedom SDF Safing and Deservicing Facility SDG Supplier Documentation Group SDH System Development Handbook SDH Software Development Handbook SDI Selective Dissemination of Information SDIF Software Development and Integration Facility SDM Subsystem Design Manuals SDM SYstem Definition Manual SDM Shuttle Data Management SDN Software Development Note SDP Supplier Data Package SDP Software Development Plan SDP Site Data Processor SDP Shuttle Data Processor SDPC Shuttle Data Processing Complex SDPC Shuttle Data Processing Complex SDR System Design Review SDR Spacelab DisPosition Record (ESA) SDR Space Division Regulation SDR Software Design Review SDR Software Design Requirements SDRB SUPPlier Documentation Review Board SDRB Software Design Review Board SDRD SuPplier Data Requirements Description SDRD SuPplier Documentation Review Data SDRL Supplier Data Requirements List SDS Software Design Specification SDS Steering Damping System SDS Shuttle Dynamic Simulation (Simulator) SDSS Space Division Shuttle Simulator SDT Structural Dynamic Test SDT Scaling and Display Task SDT Shuttle Data Tape SDTA structural Dynamic Test Article SDVF software DeveloPment and Verification Facilities SE support EquiPment SE&I System Element SE&I SYstems Engineering and Integration SE/FAC Support Eq uipm ent/Facility SEA Scanning Electrostatic Analysis SEA Silicon Elastimeter Ablator SEACF support Equipment Assembly and Checkout Facility SEADS shuttle Entry Air Data Sensor SEADS Shuttle EntrY Air Data System (Subsystem) SEADS Shuttle entry air data system SEAID SuPport Equipment Abbreviated Items Description SEAPG Support Equipment Acquisition Planning Group SEARCHS Simulation SEARCHS "Shuttle Engineer',ng Approach/Rollout Control Hybrid" SEB Scientific Equipment Bay SEB Support Equipment Building SEB Source Evaluation Board SEB SYstems Engineering Branch SEC Secondary SEC Sequential Events Controller SEC Secondary SECO Sustainer Engine Cutoff SECS Shuttle Events Control SEE Standard End Effector SEE Special Purpose End Effector SEE Subsystem SEG Segment SEI SuPPort EquiPment Installation SEI SYstem Engineering Groundrule SEICO SuPPort EquiPment Installation and Checkout SEICO System Engineering Instrumentation SEL "Select, Selector" SEM Seller's Engineering Memo SEM Space Environment Monitoring SEM System Engineering Management SEM Scanning Electron microscope SEMS Space Environment Monitor System SEN Sensor SEND Shared Equipment Need Date SENS Sensitivity SEO Special Engineering Order SEOS Synchronous Earth Observation Satellite SEP Separation SEP Source Evaluation Panel SEP SUPPort Equipment Package SEPAP Shuttle Electrical Power Analysis Program SEPAR Shuttle Electrical Power Analysis Report SEPS Solar Electric Propulsion System SEQ "Sequence,Sequencer" SER Serial SERB Systems Engineering Review Board SERB Shuttle Engineering Review Board SERS Shuttle Equipment Record System SERV Service SERVO Servomechanism SES SPecial Emphasis Study SES Shuttle Engineering Simulation SESC Shuttle Events Sequential Control SESL Space Environmental Simulation Laboratory SEUL Support Equipment Utilization List SF Sliding Filter SF Signaling Frequency SF Selection Filter SF Directorate) SF "Safe, R and QA (R&QA), and Protective Services (KSC" SF Safe SF Subcontractor Furnished SF Star Field SF Static Firing SF Scale Factor SF Safety Factor SF-SOO KSC Safety Operations Office SFA Sun Finder Assembly SFACI Software Flight Article Configuration Inspection SFC Specific Fuel Consumption SFC Selection Filter Control SFCS Survival Flight Control System SFD Crossfeed SFDS System Functional Design Specification SFDT Site Format Dump Tape SFEX Solar Flare X-ray Polarimeter SFL Secondary Freon Loop SFME Storable Fluid Management ExPeriment SFO Space Flight Operations SFOM Shuttle Flight Operations Manual SFOP Safety Operating Procedure (KSC) SFP Summary Flight Plan SFP Single Failure Point SFPA Single Failure Point Analysis SFPPL Short Form Provisioning Parts List SFPS Single Failure Point Summary SFS Shuttle Flight Status SFSS Satellite Field Service Station SFT Simulated Flight Test SFT Shaft SFT Static Firing Test SFTA Structural Fatigue Test Article SFTF Static Firing Test Facility SFTWE Software SFU Standard Firing Unit SFW Software SFWE(M) Static Feed Water Electrolysis (Module) SG gnal Generator SG LS Space Ground Link Station SGC abilized Ground Cloud SGLS Space-ground link system SGLSY Space Ground Link SYstem SGMT Simulated Greenwich Mean Time SGOS Shuttle Ground Operations Simulation (Simulator) SGP Single Ground Point SGS Steep Glide Slope SGSC Strain Gage Signal Conditioner SH LD Shield SH2 Supercritical Hydrogen SHA System Hazard Analysis SHA Sidereal Hour Angle SHAG Simplified High Accuracy Guidance (Honeywell) SHDN Shutdown SHE SuPercritical Helium SHERB Sandia Human Error Rate Bank SHF Super High Frequency SHLB Simulation Hardware Load Boxes SHLDR Shoulder SHORAN Short Range Navigation SHP Shaft HorsePower SHRD Shroud SHRD Supplemental Heat Rejection Devices SHS Simulation Hardware System SHTR Shutter SHUTDN Shutdown SIA Software Impact Assessment SIA Solar Inertial Attitude SIA Shuttle Induced Atmosphere SID Standard Interface Document SID System Interface Document SID Simulator Interface Devices SID Shuttle Integration Device SIE Shuttle Interface Equipment Services SIES "Supervision, Inspection, Engineering, and" SIG Signal SIG CONDR Signal Conditioner SIG GEN Signal Generator SIL Systems Integration Laboratory SIL Sound Interference Level SIL Silver SILTS Shuttle Infrared Leeside Temperature Sensing SILTS Shuttle infrared leeside temperature sensing SIMAS System SIMAS Shuttle Information Management Accountability SIMFAC Simulation Facility SIMR Systems Integration Management Review SIN Sine SIP SYstems Integration Office SIP Strain Isolator Pad SIP Scientific Instrument Package SIP Separation Instrument Package SIP Strain isolation pad SIPS Small Instrument Pointing System SIR Shuttle Imaging Radar SIR System Interface Requirements SIR Systems Integration Review SIR Software Initiated Restart SIR-A Shuttle Imaging Radar@A SIRR Software Integration Readiness Review SISWG STS Integrated Schedule Working Group SIT Software Integrated Test SIT Shuttle Interface Test SIT Situation SIT SSV Integrated Test SIT Shuttle Integrated Test SIU Signal interface unit SIVE Shuttle Interface Verification EquiPment SKD "Singer, Kearfott Division" SL Sea Level SL SPacelab SL Shelf Life SL Sound Level SL Seal SL&I System Load and initialization SL-SS Spacelab Subsystems SL-SSS Spacelab Subsystem(s) Segment SLA Support and Logistics Areas SLA ERNO Spacelab Product Assurance Department SLAC Stanford Linear Accelerator Center SLAHTS Stowage List and Hardware Tracking System SLAK Spacelab Late Access Kit SLAM Side Load Arrest Mechanism SLAR Side Looking Airborne Radar SLC Space Launch Complex SLC ERNO SPacelab Project Control SLCA ERNO Spacelab Contract Administration SLCC ERNO Spacelab Configuration Management SLCL ShoP/Lab Configuration Layout SLD Stiff-Leg Derrick SLE ERNO Spacelab Engineering SLEMU SPacelab Engineering Model Unit SLF Shuttle Landing Facility (OLF) SLF Shuttle landing facility (KSC) SLI ERNO Spacelab Integration and Test SLL Shelf Life Limit SLM Sound Level Meter SLN ERNO SPacelab Payload SLO ERNO Spacelab Operations SLOS Star Line of Sight SLP ERNO Spacelab Program Office SLPB Spacelab Program Board SLRV Shuttle Launched Research Vehicle SLS Secondary Landing Site SLS Sortie Lab Simulator SLS Spacelab Simulator SLS Statement Level Simulator SLS Spacelab simulator SLSA Shuttle Logistics Support Aircraft SLSMS Spacelab Support Module Simulator SLT ERNO Spacelab Technology SLV Space Launch Vehicle SM ES "Shuttle Mission Eng',neering Simulator" SM ES Shuttle Mission Evaluation Simulation (Simulator) SM IA Serial Multiplexer Interface Adapter SM&S Systems Management and Sequencing SM/PM System Management/Performance Monitor SMAB Solid Motor Assembly Building SMAB Solid Motor Assembly Building SMAG Star Magnitude SMART Shuttle Meeting Action - Item Review Tracking SMB Space Meteorology Branch SMCH Standard Mixed Cargo Harness SMD Special Measuring Device SMD Special Measuring Service SMD Spacelab Mission DeveloPment SMDC Shielded Mild Detonating Cord SMEAR Span/Mission Evaluation Action Request SMG Superconduction Magnetic Energy Storage SMG SPaceflight Meteorology Group SMIR Shuttle Multispectral Infrared Radiometer SML Structure Mold Line SMMD Specimen Mass Measurement Device SMP software Management Plan SMPM Structural Materials Property Manual SMPTRB Shuttle Main Propulsion Test Requirement Board SMQ structure Module Qualification Test SMR "source, Maintenance, and RecoverabilitY (Code)" SMRD Spin Motor Rotational Detector SMRD Spin Motor Run Discrete SMRM solar Maximum Repair Mission SMS Shuttle mission simulator SMSi Standard Manned Space Flight Initiator SMT Selective Message Transaction SMTAS Shuttle Model Test and Analysis System SMU Speaker/microphone unit SMVP Shuttle Master Verification Plan SMVRD Shuttle Master Verification Requirements Document SNF SYstem Noise Figure SNR Signal-to-Noise Ratio SNSO Space Nuclear SYstems Office SNSR Sensor SO FT Square Feet SOA R Shuttle Orbital Applications and Requirements SOARS Shuttle Operation Automated Reporting System SOATS SLPport Operation Automated Training System SOCA R Shuttle Operational Capability Assessment Report SOCH Spacelab Orbiter Common Hardware SODB Shuttle Operational Data Book SODB Start of Data Block SODS Shuttle Operational Data System SODS Skylab Orbit-Deorbit System SOF Safety of Flight SOFI Spray-on Foam Insulation SOFT Space Operations and Flight Techniques SOH Start of Heading SOL Solar SOL Solenoid SOL Squelch SOLN Solution SOMF Start of Minor Frame SOMS Shuttle orbiter medical system SOMS Shuttle orbiter medical system SOP Secondary Oxygen Pack SOP Spacelab OPportunity Payload SOP Subsystem(s) Operating Procedure SOP Systems Operation Plan SOP Standard Operating Procedure SOP Subsystem operating program SOPC Shuttle Operations Planning Complex SOPC Shuttle Operations and Planning Center SOR "Stable Orbit Rendez,o,s" SOR Specification Operational Requirement SORPTR South Repeater SORTIE Short Term Mission SOT Strap-on Tank SOTS Suborbital Tank Separation SP Shoulder Pitch SP Shuttle Projects Office (KSC) SP Signal Processor SP Single Pole SP Single Precision SP Solar Physics SP Spare SP Spin SP Standard or Peculiar SP Static Pressure SP&S Special Processes and Sequencing SP-AF Air Force STS Liaison Office (KSC Shuttle) SP-AF Air Force Support Office (KSC) SP-FGS Flight and Ground Systems Office (KSC Shuttle) SP-ILS Integrated Logistics Support Office (KSC Shuttle) SP-LMO Logistics Management Office (KSC) SP-OPI OPerations Planning and Integration Office (KSC SP-OPI Shuttle) SP-OSO Off-Site Offices (KSC Shuttle) SP-PAI Project Assessment and Integration Staff (KSC) SP-PCO Program Control Office (KSC Shuttle) SP-PMS Performance Management Systems Office (KSC) SP-SMO Site Management Office (KSC Shuttle) SPA Space Processing Application SPA Signal Processor Assembly SPA Shared Peripheral Area SPA Servo Power Amplifier SPA S-Band Power Amplifier SPA Signal processor assembly SPA Steering position amplifier SPACE Spacecraft Prelaunch Automatic Checkout Equipment SPAD Subsystem Positioning Aid Device SPAD Shuttle Payload Accommodation Document SPADS Shuttle Problem Analysis Data System SPADS Shuttle Problem Action Data System SPAF Simulation Processor and Formatter SPAH Spacelab Payload Accommodations Handbook SPAN Spacecraft Analysis SPART Space Research and Technology SPAS Shuttle Pallet Satellite (German) SPC Starting Point Code SPC Shipping and Packing Cost SPC Stored Program Command SPC Synoptic Properties Code SPC Shuttle processing contractor SPCC STS Processing Control Center SPCU Simulation Process Control Unit SPCW Stored Program Command Word SPD Standard Practice Directive SPD Speed SPD R Software Preliminary Design Review SPDB Subsystem Power Distribution BC)x SPDBK Speed Brake SPDCI Standard Payload Display and Control Interface SPE Solid Polymer Electrolysis SPE Static Phase Error SPEC Specialist Function SPEC Specification SPECT Spectrometer SPEE Special Purpose End Effector SPF Single Point Failure SPF Software Production Facility SPF Spacelab Processing Facility SPFA Single Point Failure Analysis SPFP Single Point Failure Potential SPG Signal Point Ground SPG Single Point Ground SPHER Spherical SPI Surface Position Indicator SPI Surface position indicator SPIAP Shuttle/Payload Integration Activities Plan SPICE SPacelab Payload Integration and Coordination in SPICE Europe SPIDF Support Planning Identification File SPIDPO Office (JSC) SPIDPO Shuttle Payload Integration and Development Progra SPIDPO Shuttle Payload Integration and Development Program Office SPIF Standard Payload Interface Facility SPIF Shuttle Payload Integration Facility SPII Shuttle Program Implementation Instruction SPIMS Shuttle Program Information Management System SPKB Speed Brake SPKR Speaker SPL Scratch Pad Line SPL Serialized Parts List SPL Sound Pressure Level SPL System Programming Language SPLX Simplex SPLY Supply SPM Subsystem Project Manager SPMS Special Purpose Manipulator System SPN Shuttle Project Notice (KSC) SPND Suspend SPO Spare Parts Order SPO Shuttle Projects Office SPO SYstem Program Office SPOC Shuttle Payload Operations Contractor SPOM STS Planning and Operations Management SPP Simulation Planning Panel SPP Solar Physics Payload SPPIL Shuttle Preferred Pyrotechnic Items List SPPL Spare Parts Provisioning List SPPP Spacelab Payloads Processing Project SPR Software Problem Report SPR Subcontractor Performance Review SPRAG STS Payloads Requirements and AnalYsis Group SPRT Sequential Probability Ratio Test SPS Service Propulsion Subsystem SPS Shuttle Procedures Simulator SPS Statement of Prior Submission SPS Samples per Second SPS Secondary Propulsion System SPS Solar Power Satellite SPT Support SPT Steering position transducer SPTD Supplemental Provisioning Technical Documentation SPVPF Shuttle Payload Vertical Processing Facility SR Statement of Requirements SR Sunrise SR Status Register SR Status Report SR Status Review SR Support Request SR Standard Repair SR Shift Register SR Scan Ratio SR Support Room SR&Q "Safety, Reliability, and Quality" SR&QA "Safety, Reliability, and Quality Assurance" SRA Spin Reference Axis SRA Support Requirements Analysis SRAG Space Radiation Analysis Group SRB Solid Rocket Booster SRB Solid rocket booster SRBAB SRB Assembly Building SRBDF SRB Disassembly Facility SRBPF Solid Rocket Booster Processing Facility SRC Sample Return Container SRCB Software Requirements Change Board SRCB Software Requirements Control Board SRCBD Software Requirements Change Board Directive SRCBD Software Requirements Control Board Directive SRCH Search SRD Shuttle Requirements Definition SRD Shuttle Requirements Document SRD SYstems Requirements Document SRDH Subsystems Requirement Definition Handbook SRDH System Requirements Definition Handbook SRE STDN Ranging Equipment SRF Shuttle Refurbishment Facility SRH Subsystems Requirements Handbook SRM Standard Reference Material SRM SPecification Requirements Manual SRM Solid Rocket Motor SRM Solid rocket motor SRMC Stimulus/Response Measurements Catalog SRN Software Release Notice SRO Supervisor Range Operations SRPA Spherical Retarding Potential Analyzer SRR Site Readiness Review SRR Shuttle Requirements Review SRR Software Requirements Review SRR System Requirements Review SRS Software Requirements Specification SRS Simulated Remote Station SRS Support Requirements System SRS Specification Revision Sheet SRSF SRB Refurbishment and Subassembly Facility SRSF SRB Receiving and Subassembly Facility SRSR Schedule and Resources Status Report SRSS Shuttle Range Safety System SRT Supporting Research and Technology SRT Station Readiness Test SRT Specification Requirements Table SRT Special Rated Thrust SRT Shuttle Requirements Traceability SRU Space Replaceable Units SRU ShOP-Replaceable Unit SRU Shop Replacement Unit SRVL Survival SS System Software SS Single String SS Subsystem SS Station Set SS Space Station SS System Summary SS Space Shuttle SS System Specification SS Sunset SS Shuttle System SS Single Sideband SS&A Space Systems and Applications SSA S-Band Single Access SSA Shuttle Simulation Aircraft SSA Space Suit Assembly SSA 1/0 GCOS Program Element Name SSAT SPace Shuttle Access Tower (now FSS) SSAT Shuttle Service and Access Tower SSB Single Sideband SSB Source Selection Board SSBC Summary Sheet Bar Chart SSC L Shuttle System Commonality List SSCA Surface Sampler Control Assembly SSCHS Space Shuttle Cargo Handling System SSCP Small Self-Contained Payloads SSCSP Space Shuttle Crew Safety Panel SSD Spacecraft Software Division SSD System Summary Display SSDD Software System Design Document SSDH Subsystem Data Handbook SSDS Space Station Data System SSE Space Shuttle Engines SSE Subsystem Element SSE SubsYstem Support Equipment SSEOS Space Shuttle Engineering and Operations Support SSF SRB Storage Facility SSFGSS Space Shuttle Flight and Ground System Specification SSFL Santa Susana Field Laboratory SSFS Space Shuttle Functional Simulator SSHB Station Set Handbook SSIBD Shuttle System Interface Block Diagram SSID Shuttle Stowage Installation Drawing SSIP Systems Software Interface Processing SSITP Shuttle System Integrated Test Plan SSL System Software Loader SSM B Space Shuttle Maintenance Baseline SSM E Space Shuttle Main Engine SSM EC Space Shuttle Main Engine Controller SSME Space shuttle main engine SSMECA Space Shuttle Main Engine Controller Assembly SSMECA SSM E Controller Assembly SSOP Space Systems Operating Procedure(s) SSP Standard Switch Panel SSP Space Shuttle Program SSP Small Sortie Payload SSPC Spacelab Stored Program Command SSPD Shuttle System Payload Data SSPD Shuttle System Payload Description SSPD Shuttle System Payload Definition (Study) SSPDA Space Shuttle Payload Data Activity SSPDB Subsystem Power Distribution Box SSPDS Space Shuttle Payload Data Study SSPGSE Space Shuttle Program Ground Support Equipment SSPM Space Shuttle Program Manager SSPO Space Shuttle Program Office SSPP SYstem Safety Program Plan SSPPSG Space Shuttle Payload Planning Steering Group SSPRO Space Shuttle Program Resident Office SSPS Space Shuttle Program schedule SSPTF Santa Susana Propulsion Test Facility (see SSFL) SSR Shop Support Request SSR Station Set Requirement SSR System Requirements Review SSR Staff SuPport Room SSRD Station Set Requirements Documents SSRN System Software Reference Number SSRR Station Set Requirements Review SST Single System Trainer SST Subsystem Terminal on Spacelab SST Structural Static Test SST SPacecraft Systems Test SSTC Space Shuttle Test Conductor SSUS-A SSUS for Atlas-Centaur Class Spacecraft SSUS-D SSUS for Delta Class Spacecraft SSUSP Spinning Solid Upper Stage Project SSiS Space Station Information System ST Star Tracker ST Spacelab Technology ST SPace Telescope ST Static ST Sequential Timer ST Special Tooling ST Self Test ST Starter ST SimPlification Task ST Structural ST Star tracker STA Static Test Article STA Station STA Structural Test Article STA Shuttle Training Aircraft STA Structural test article STA R Scientific and Technical Report STA R Shuttle Turnaround AnalYsis Report STAB "Stabilize, Stabilizer" STADAC Station Data Acquisition and Control STADAN Satellite Tracking and Data Acquisition Network STADAN Space Tracking and Data Acquisition Network STADN Space Tracking and Acquisition Network STADU System Termination and Display Unit STAG Shuttle Turnaround AnalYsis Group STARR "Schedule, Technical, and Resources Report" STAT Status STAT Statistics STBD Starboard STBY Standby STC Standard Test Configuration STC Systems Test Complex STC Spacecraft Test Conductor STC Satellite Test Center STCP Short-Term Cost Plan STD Standard STD Shuttle Test Director STD L Standard Distribution List (letter denoting which list STD L follows) STDN Spaceflight Tracking and Data Network STDN Space Tracking and Data Network STDN Space flight tracking and data network STDY Steady STE Special Test EquiPment STE System Test Engineer STF Spin Test Facility (see DSTF) STF Structural Fatigue Test STG Stage STIL Software Test and Integration Laboratory STIRD SAIL Test Implementation Requirements Document STL Space Technology Laboratories STLOS Star Line of Sight STM Signal Termination Module STM Static Test Model STM Support Test Manager STN Software Trouble Note STO Stow STOCC Space Telescope Operations Control Center STP Space Test Program STP Self-Test Program STP Shuttle Technology Panel STP Subsystem Test Plan STP Space Technology Payload STPH Static Phase Error STR Structure STR System Test Review STR L Structural STRB Strobe STRCH Stretch STRFLD Star Field STRG Steering STRG String STRUC Structure STRUCT Structure STS Structural Transition Section STS Space Transportation System STS Shuttle Test Station STS Space transportation system STS R System Test Summary Report STSG Shuttle Test Group STSOPO Off ice (JSC) STSOPO Shuttle Transportation Systems Operations Program STT Spacelab Transfer Tunnel STU Special Test Unit STU Star Tracker Unit SUB Substitute SUBJ Subject SUMS Shuttle upper atmosphere mass spectrometer SUP Supply SUP Support SUPCRIT Supercritical SUPPR Suppression SUPSALV Supervisor of Salvage (U.S. Navy) SUPT Support SUPV Supervisor SURE Shuttle Users Review and Evaluation SURF Surface SURS Standard Umbilical Retraction System SUTAGS Shuttle Uplink Text and Graphics Scanner SVA&C Shuttle Vehicle Assembly and Checkout SVAB Shuttle Vehicle Assembly Building SVAC Shuttle Vehicle Assembly and Checkout (Facility) SVAFB South Vandenberg Air Force Base SVB Shuttle Vehicle Booster SVB Space Vehicle Booster SVDS Space Vehicle Dynamic Simulator SVRR Software Verifir-ation Readiness Review SW/PM System Management/Performance Monitor SWA Support Work Authorization SWAA "SPacelab Window Adapte, Assembly" SWAD Subdivision of Work Authorization Document SWAT Stress Wave Analysis Technique SWG Software Working Group SWOB "Salaries, Wages, Overhead, and Benefits" SWP Safe Working Pressure SWR Standing Wave Ratio SWT Supersonic Wind Tunnel SWT Sextant SXT Sextant SY System SY Shoulder Yaw SYM Symbol SYMM Symmetrical SYN Synthetic SYN Synchronous SYNC Synchronize SYNCOM Hughes Spin Stabilized Spacecraft SYNCOM Synchronous Communication Satellite (Hughes) SYS System SYSTRAN Systems Analysis Translator SiMCOM Simulation Complex Sims Shuttle Inventory Management System Sims Shuttle Imaging Microwave System Sols Spacelab/Orbiter Interface Simulator Station (KS Station (KSC) [T] T Temperature Rate T Superscript) T "Transformation (Matrix), Transpose (Matrix" T Throttle Command T Time T Talk/Monitor T Total Temperature T Top T Thermostabilized T Test T Temperature T LSCP Telescope T&CD Timing and Countdown T&CP Test and Checkout Procedure T&D TransPortation and Docking T&E Test and Evaluation T&M Time and Materials T&O Test and Operations T+ Time Postintegration T- Time Prior to Launch T-0 Time Zero T-0 Takeoff T. B. Toggle Buffer T.P. Transition Period T/A Turnaround T/C Temperature Compensating T/C Thrust Chamber T/C Telecommunications T/C Termination Check T/CAP Thermal Capacitor T/D Time Delay T/D Touchdown T/E Transporter/Erector T/L Talk and Listen T/L Timeline T/L Transformer Load T/O Takeover T/R Transmitter/Receiver T/R Transmit/Receive T/R Tape Recorder T/R Technical Report T/R Transformer Rectifier T/R Transportation Request T/R Transmitter/Receiver T/R Transportation Request T/R Turnaround RequiremLnts T/T Terminal Timing T/T Timing/Telemetry T/TCA Thrust/Translation Control Assembly T/V Thermal Vacuum T/W Thrust Weight T/W Thrust-to-Weight T/W Thrust-to-weight TA Task Analysis TA Test Article TA Time Actual TA Travel Authorization TA Trunnion Angle TAA Temporary Access Authorization TAA Technical Assistance Agreement TAC "Kennedy Space Center Landing Site, Florida" TAC Tactical Air Command TAC Total Average Cost TAC/RA TACAN Radar Altimeter TACAN Tactical Air Navigation TACAN Tactical Air Command and Navigation System TACAN Tactical air navigation TACH Tachometer TACO Test and Checkout Operations TAD Temperature and Dewpoint TAEM Terminal Area Energy Management TAEM Terminal area energy management TAG Technical Air-to-Ground TAGS Text and Graphics System TAIR Test Assembly Inspection Record TAL Transatlantic Abort Landing TAL Transoceanic Abort Landing TALAR Tactical Approach and Landing Radar TAM Thermal Analytical Model TAN "Tananarive, Madagascar (STDN Site)" TAO Trans-Atlantic Abort TAP Total Air Pressure TAP Technical Achievement Plan TAP Telemetry Acceptance Pattern TAP Test Administration Plan TAR Technical Analysis Request TAR Test Agency Report TAR Test Action Requirement TARC TAS Telemetry Antenna Subsystem TARC Test Article Specification TARC True Airspeed TARC Through Axis Rotational Control TASPR TATI Total Air TemPerature Indicator TASPR Technical and Schedule Performance Report TASPR TAT Technical Acceptance Team TASPR Total Air Temperature TASPR Turnaround Time TB Talk Back TB Toggle Buffer TB Time Duration of Burn TB Time Base TB Terminal Board TB Terminal Base TBA To Be Announced TBA To Be Added TBC Terminal Buffer Controller TBD To Be Defined TBD To Be Developed TBD To Be Determined TBE To Be Evaluated TBF Test de Bon Fonctionnement (Spacelab) TBI Through-Bulkhead Initiator TBN To Be Negotiated TBP To Be Provided TBS Task Breakdown Structure TBS To Be Specified TBS To Be Superseded TC Telecommunications TC Temperature Compensating TC Test Conductor (Contractor) TC Test Conductor (Controller) TC Thermal Control TC Thermocouple TC Thiokol Corporation TC Thrust Chamber TC Time to Circular TC Traceability Code TC Tracking Camera TCA Thrust Chamber Assembly TCA Time of Closest Approach TCA Translation Controller Assembly TCAB Temperature of Cabin TCC Thermal Control Coating TCC Test Control Center TCD Test Completion Date TCD Test Control Document TCE Thermal Canister Experiment TCF Tank Checkout Facility TCG Test Control Group TCG Time Code Generator TCI Technical Critical Item TCID Test Configuration Identifier Document TCMD Transportation Control and Movement Document TCN Test Change Notice TCN Transportation Control Number TCO Test and Checkout TCO Taken Care of TCOP Test Checkout Pian(s) TCP Thrust Chamber Pressure TCP Task Control Packet TCP Test Checkout Procedure TCP Test Control Package TCR Thermal Concept Review TCR Test Constraints Review TCR Test Conductor TCR Test Compare Results TCRSD Test and Checkout Requirements Spec. Documentation TCS Thermal Control System (Subsystem) TCS Test Control System TCS Test Control Supervisor TCS Technical Concurrence Sheets TCS Technical Change Summary TCSSS Thermal Control Subsystem Segment TCTI Time Compliance Technical Instruction TCTO Time Compliance Technical Order TCU TaPe Control Unit TCV Thrust Chamber Valve TCV Temperature Control Voltage TD Technical Directive TD Test Director (NASA) TD Terminal Distributor TD Time Delay TD Touch Down TD&SA "Telephone, Data, and Special Audio" TDD Task Description Document TDM Time-Division Multiplexing (Multiplexer) TDP Tracking Data Processor TDP Temperature and Dewpoint TDR Technical Documentation Report TDR Technical Design Review TDR Test Discrepancy Report TDRR Test Data Recording and Retrieval TDRS Telemetry Downlist Receiving Site TDRS Tracking and Data Relay Satellite TDRS Tracking and Data Relay Satellite TDRSS Tracking and Data Relay Satellite System TDRSS Tracking and Data Relay Satellite system TDS Technology Demonstration Satellite TDS Test Data System TDU Time Display Unit TDV Test Data Van TDY Temporary Duty TE Test Equipment TE Time Earliest/Expected TE Timing Electronics TE Trailing Edge TEC Test Equipment Center TECH Technician TECH Technical TED Trailing Edge Down TELCOM Telecommunications TELESAT "TELESAT (Canadian Payload, Communication Satellite)" TEMP Test and Evaluation Master Plan TEMP Temperature TEMS Transport Environment Monitoring System TEOS Tetraethyl Orthosilicate TEP Test Evaluation Plan TEP Technical Evaluation Panel TER Time Estimating Relationship TER Test Equipment Readiness TERL Test Engineer Readiness List TERL Test Equipment Readiness List TERM Terminate TESH Technical Shop TET Test Evaluation Team TF Test Facility TF Test Fixture TFC Time from Cutoff TFCS Triplex Flight Control System (Subsystem) TFE Time from Event TFF Time to Free Fall TFI Time from Ignition TFL Telemetry Format Load TFL Time from Launch TFOV Total Field of View TFR Trouble and Failure Report TFS Telemetry Format Selection TFU Test Facility Utilization TG Ground Systems (KSC Directorate) TG "Ground Systems, TS" TGA Trace Gas Analyzer TGA Thermal Gravimetric Analysis TGO Time to Go TGOWG Teleoperator Ground Operations Working Group TGS Rate Gyro Assembly TGS Telemetry Ground Station TGS Telemetry Ground System TGSE Telemetry Ground Support Equipment TGT Target THC Translation Hand Controller THC Translational hand controller THDS Time Homogeneous Data Set THEO Theoretical THERM Thermal THOLD Threshold THOUS Thousarid THP Thrust Horsepower THROT Throttle TI Information Systems (KSC Directorate) TI Technical Integration TI Training Integrator (Integration) TIC Technical Information Center TIC Total Item Change TICM Test Interface and Control Module TIFS Total In-Flight Simulator TIG Time of Ignition TIM Technical Interchange Meeting TIM Time Interval Monitor TIO Target insertion orbit TIP Thrust Inlet Pressure TIROS ToPographical Infrared Operations Satellite TIS Test Interface subsystem TK Tank TL Transient Load TL Lot Traceability TL Thrust Level TL Time Latest TLC Telecommand TLCE Transmission Line Conditioning Equipment TLM Telemetry TLM Telemetry TLS Time Line Sheet TLS Top Left Side TLSA Torso Limb Suit Assembly TLV Transporter-Loader Vehicle TLV Threshold Limit Value TM Traffic Model TM Time Management TM Telemetry TM Technical Management TM Table Maintenance TM Member Traceability TMB Transportation Management Bulletin TMBU Table Maintenance Block Update TMC Test Monitoring Console TMECO Time of Main Engine Cutoff TMF Transporter Maintenance Facility TMG Thermal Meteoroid Garment TMI Technical Management Items TMO Tool Manufacturing Order TMO Test Manufacturing Order TMP Time Management Processor TMP Terminal Panel TMPRY Temporary TMPV Torquemotor Pilot Valve TMR Timer TMU Temperature Measurement Unit TN Technical Note TNL Tunnel TNT Trinitrotoluene TO Operations Management (KSC Directorate) TO Operations Management (TS) TO Takeoff TO Task Order TO Technical Order TOC Test Operations Center TOC Test Operations Change TOC Total Organic Carbon TOF Test Operations Facility TOG Toggle TOI Transfer Orbit Insertion TOL Tolerance TOO Test Operations Order TOO Threshold of Odor TOP Technical Operating Procedure TOPS Transistorized Operational Phone System TOS Test Operating System TOT Total TOW Tank and Orbiter Weight TP Training Plan TP Type TP Turbo Pump TP Test Procedure TP Test Point TP True Position TP Transition Period (T.P. preferred) TP Test Port TP Time to Perigee TP&C Thermal Protection and Control TPA Test Preparation Area TPAD Trunnion Pin Attachment Device TPC Telemetry Preprocessor Computer TPDS Test Procedures DeveloPment System TPE Test Project Engineer TPF Tug Processing Facility TPF Transfer Phase Final TPF Terminal Phase Finish TPF Terminal Phase Finalization (Braking) TPI Terminal Phase Initiation TPM Terminal Phase Midcourse TPM Transfer Phase Midcourse TPM Terminal Phase Maneuver TPM Technical Performance Measurement (System) TPM 1 Terminal Phase Midcourse #1 TPM2 Terminal Phase Midcourse #2 TPO Test Program Out@ine TPR Teleprinter TPR Test Problem Report TPS Twisted Pair Shielded TPS Test Preparation Sheet TPS Thermal Protection Subsystem TPS "Thermal Protection System (SR[3, ET, or Orbiter)" TPS Thermal protection system TPSE Thermal Protection Subsystem Experiments TPUN Test Procedure Update Notice TR Time to Retrofire TR Transportation Request TR Test Request TR Thrust Reverser TR Technical Report TR/SBS Teleoperator Retrieval/Skylab Boost System TR2 Payload Furnished Mars Tape Recorder (2 of 2) TRA Turnaround Requirements Analysis TRA Training Requirei-nents Analysis TRACS Tool-Record Accountability System TRAJ Trajectory TRANS Translation TRANS Transition TRANSL Translation TRB Technical Review Board TRB Test Review Board TRBL Troubleshooting TRCP Tape Recorder Control Panel (LIO) TRD Test Requirements Document TRF Tuned Radio Frequency TRI Payload Furnished Mars Tape Recorder (1 of 2) TRK Track TRKR Tracker TRL Test Readiness List TRN Trunnion TRNG Training TRQ Torque TRR Test Readiness Review TRRB Test Readiness Review Board TRS Top Right Side TRS Tug Rotational System TRS Troubleshooting Record Sheet TRS Time Reference System TRS Teleoperator Retrieval System TRSD Test Requirements Specification Document TRUN ANG Trunnion Angle TS Serial Traceability TS Technical Support (KSC Directorate) TS Tensile Strength TS Test Site TS Test Stand TS Test Station TS Time Scheduled TS Timing System TSA Test Start Approval TSAC Tracking System Analytical Calibration TSB Temporary Stowage Bag TSB Twin Sideband TSC Test Setup Complete TSC Test Support Coordinator TSC Two-Stage Command TSCION TSC 1/0 Number TSCO Test Support Coordination Office TSCO Test Support Coordinator TSCP Training Simulator Control Panel TSD Test Start Date TSE Transportation Support Equipment TSGP Test Sequence Generator Program (ESTEC) TSLD Troubleshooting Logic Diagram TSM Trade Study Management TSM Tail Service Mast TSM Tail service mast TSO Time Since Overhaul TSO Time Sharing Option TSP Twisted Shielded Pairs (Cables) TSP Test Software Program TSR Technical Status Review TSR Test Status Report TSRA Total System Requirements Analysis TSS Time Sharing System TSS TPS Summary Sheet Control TSS Tug Structural Support TSSU Test Signal Switching Unit TST Test TSU Time Standard Unit TSW Test Software TSW Test Switch TT Total Time TT Terminal Timing TT Thrust Termination TT Total Temperature TT&C Tracking Telemetry and Control TT&C "Tracking, telemetry and command" TTA Time to Apogee TTA Thermomechanical Test Area TTC Time to Circularize (Orbit) TTC "Telemetry, Tracking, and Command" TTC Tunnel Thermal Control TTCA Thrust Translation Controller Assembly TTCV "Tracking Telemetry, Command, and Voice" TTE Time to Event TTE L Tool and Test Equipment List TTG Time to Go TTL Transistor-Transistor Logic TTLM Through-the-Lens Light Metering TTP Time to Perigee TTU Timing Terminal Unit TTV "Termination, Test, and Verification" TTY Teletype TU Transport Unit TU Technical Utilization TU Technology Utilization TUL "Tula Peak, NM (STDN site)" TURB Turbine TV Transport Vehicle TV Television TV Thermal Vacuum TV Thrust Vector TVA Thrust Vector Alignment TVAR Test Variance TVC Thermal Vacuum Chamber TVC Thrust Vector Control TVC Thrust vector control TVCA Thrust Vector Control Actuator TVCD Thrust Vector Control Driver TVCS Thrust Vector Control System TVEXPIS TV Experiment Interconnecting Station TVN Test Verification Network TVP Test Verification Program TVS Toxic Vapor Suit TVSA Thrust Vector Control Servoamplifier TVSSIS TV Subsystem Interconnecting Station TVT Thermal Vacuum Test TVTA Thermal Vacuum Test Article TW Tailwind TW Thumbwheel TW Time Words TW Traveling Wave TWD Twisted Double Shielded TWL Total Weight Loss TWR Tower TWT Traveling Wave Tube TWT Trisonic Wind Tunnel (Rockwell) TWTA Traveling Wave Tube Amplifier TWX Teletype Wire Transmission TX Translation Hand Controller X-Axis Direction TX Transmit Channel TX/RX Transmitter/Receiver TY Translation Hand Controller Y-Axis Direction TYP Typical TZ Translation Hand Controller Z-Axis Direction Tll Tooling Inspection Instrumentation [U] U Uranium U-SB Unified S-Band U/C Under Current U/D Update U/L Uplink (UPLK preferred) U/M Unit of Measure U/M Unmanned U/M Unscheduled Maintenance U/O Used on U/V Under Voltage U/W Used with UA Microampere UB Upper Brace UB UpUtility Bridge UBE Universal Bus Exercisor UBIC Universal Bus Interface Controller UCD Urine Collection Device UCN Uniform Control Number UCPU Urine Collection and Pretreatment Unit UCR Unsatisfactory Condition Report UCTA Urine Collection Transfer Assembly UD Update UDB Update Buffer UDF Utility and Data Flow UDL Updata Link UDL Update Link UDMH Unsymmetrical Dimethylhydrazine UDMH/H Unsymmetrical Dimethylhydrazine Hydrazine Blend UDOP Ultrahigh Doppler UDS Universal Documentation System UER Unique Equipment Register UF Microfarad UFD User File Directory UG Microgram UHF Ultrahigh Frequency UHF Ultrahigh frequency UL Upper Limit UL Underload UL Uplink UL Upper Left (S-Band Antenna) ULA "Fairbanks, Alaska (STDN Site)" ULL Ullage ULO Unmanned Launch Operations ULT Ultimate UMB Umbilical UMBC Umbilical Cord Cable UMVF Unmanned Vertical Flight UNBAL Unbalance UNDK Undock UNDV Undervoltage UNIV Universal UNLCH Unlatch UNLK Unlock UP Upper UPLK Uplink UPP User Parameter Processing UPS Uninterruptible Power Supply UPS Uninterruptible Power System UPS Upright Perigee Stage UPTLM UPlink Telemetry UR Unsatisfactory Report UR Upper Right URA Urine Receptacle Assembly URN Urine URT Upright USA United States of America USAF United States Air Force USB Upper Side Band USB Unified S-Band USBE Unified S-Band Equipment USBI "United Space Booster, Inc." USBS Unified S-Band System (Subsystem) USEC Microsecond USN United States Navy USNS United States Navy Ship USRA Universities Space Research Association UST Universal Servicing Tool UST United States Testing (Company) UT Unit Tester UT Universal Time UT Umbilical Tower UT&GS Uplink Text and Graphics System UTC Unit Test Cases UTC United Technology Center UTC Universal Test Console UTC Coordinated Universal Time UTE Universal Test Equipment UTI L Utility UTLM Up Telemetry UTS Urine Transfer System UUT Unit Under Test UVD Under Voltage Device UVF Unmanned Vertical Flight Ul User Interface Ul Unit of Issue [V] V Velocity V Valve V Voice V Volt V Voltage V Verb V&DA Video and Data Acquisition V&DA Video and Data (Processing) Assembly V&V Validation and Verification V-A Vibro-Acoustic V-A Volt-Ampere V-BAR Velocity Vectory Axis V-CITE Vertical-Cargo integration Test EquiPment V-RTIF Vandenberg Real Time Interface V/A video/Analog V/C Vector Control V/C Velocity Counter V/H VelocitY-to-Height V/M Velocity Meter V/V Vent Valve V/V Validation and Verification (also V&V) VA Vibro-Acoustic Test VA Velocity at Apogee VA Volt Ampere VA/T/VTA Vibro-Acoustic/Thermal/Vacuum Test Article VAA Viewpoint Adapter Assembly VAA Vehicle Assembly Area VAB Vehicle Assembly Building VAB Vehicle Assembly Building VAC "Volts, ac" VAC Vehicle Assembly and Checkout VAC Vacuum VAD Vandenberg Addendum Document VAFB Vandenberg Air Force Base VAFB Vandenberg Air Force Base VAK Vertical Access Kit VAK Vertical Assembly Kit VAL Valid VALID Validation VAN USNS Vanguard (STDN) VAP Vapor VAR "Variable, Variance, Variation" VAR Verification Analysis Report VAR Volt Ampere Reactive VASI Visual Approach Slope Indicator VAST Versatile Avionics System Tester VAT Vibro-Acoustic Test VATA Vibro-Acoustic Test Article VATF Vibration and Acoustic Test Facility VCAP Vehicle Charging and Potential Experiment VCB Vertical Location of the Center of Buoyancy VCD Verification Control Document VCD(S) Vapor Compression Distillation (Subsystem) VCE Voice VCG Vertical Location of the Center of Gravity VCG Vector Cardiogram VCN Verification Completion Notice VCP Vandenberg Contract Report VCT Voltage Control Transfer VCTR Vector VCU Video control unit VDA Valve Driver Assembly VDA Variable Data Area VDC "Volts, dc" VDD Version Description Document VDD Verification Description Document VDI Vendor Documentation Inventory VDI Vertical Display Indicator VDS Vehicle Dynamics Simulator VDT Vehicle Data Table VDU Visual Display Unit VE Equivalent Velocity VE Vehicle Engineering (KSC VBO Directorate) VECIB Vehicle Engineering Change IMplementation Board VECO Vernier Engine Cutoff VEDS Vehicle Emergency Detection System VEEI Vehicle Electrical Engine Interface VEFCO Vertical Functional Checkout VEH Vehicle VEH ID Vehicle Identification VEI Vehicle End Item VEL Velocity VER Verify VERIF Verification VERLORT Very Long Range Tracking Radar VERN Vernier VERT Vertical VF Video Frequency VF Vertical Flight VFE Vendor Furnished EquiPment VFI Verification Flight Instrumentation VFM View finder monitor VFO Variable Frequency Oscillator VFR Visual Flight Rules VFT Verification Flight Test VGIMU Velocity To Be Gained as Related to IMU Orientati VGOR Vandenberg Ground Operations Requirement VGOR Vehicle Ground Operation Requirements VGP Vehicle Ground Point VGT Vehicle Ground Test VGVT Vertical Ground Vibration Test VGX Velocity To Be Gained (Body X-Axis) VGY Velocity To Be Gained (Body Y-Axis) VGZ Velocity To Be Gained (Body Z-Axis) VHAA Very High Altitude Abort VHF Very high frequency VHF Very High Frequency VHF/AM Very High Frequency Amplitude Modulator VHF/DF Very High Frequency Direction Finder VIA By Means of (By Way of) VIB Vertical Integration Building VIB Vertical Integration Building VIB "Vibrate, Vibration" VID Video VIDD Vertical Interval Data Detector VITT Vehicle Integration Test Team VIU Video interface unit VL Expendable Vehicles (KSC VO Dir.) VLBI Very Long Baseline Interferometer VLF Very Low Frequency VLPS Vandenberg Launch Processing System VLR Very Low Range VLS Vandenberg Launch and Landing Site VLV Valve VLV Value VMF Vertical Maintenance Facility VO Velocity Initial VO Vehicle Operations VO Shuttle Operations (KSC Directorate) VO Space Vehicle Operations (KSC Dir.) VO Voice VOIR Venus Orbiter Imaging Radar VOL Volume VOMD VAFB Operations and Maintenance Documentation VOR VHF Omnidirectional Radio Range VOR-DME VHF Omni Range-UHF Distance Measuring Equipment VORTAC Variable Omni Range Tactical (VOR and TACAN) VORTAC VHF Omni Range Tactical Air Navigation VOT VHF Omni Test VP Viewpoint VP Vertical Polarization VP Verification Polarization VP Vacuum Pump VP "Shuttle Payloads (KSC VO Dir., see CO, CS, CV@" VPF Vertical Processing Facility VPF Vertical Processing Facility VPHD Vertical Payload Handling Device VPI Valve Position Indicator VPK Volts Peak VPM Vehicle Project Manager VR Velocity Relative VR Voltage Regulator VR Variable Reluctance VR Video Recorder VR Voltage Relay VRB VHF Recovery Beacon VRCS Vernier Reaction Control System VREL Relative Velocity VRF Vertical Removal Fixture VRL Vertical Recovery Line VRL Vertical Reference Line VRMS Volts Root Mean Square VRNR Vernier VRR Verification Readiness Review VSA Verification Site Approval VSA Variable Stability Aircraft VSB Vestigial Side Band VSD Vertical Situation Display VSN Video Switching Network VSTAG Vandenberg Shuttle Turnaround AnalYsis Group VSWR Visual Standing Wave Ratio VSWR Voltage Standing Wave Ratio VT STS Processing (KSC VO Dir.) VT Vent VTF Vertical Test Flight VTM Vibration Test Module VTN Verification Test Network VTP Verification Test Plan VTP Vehicle Test Plan VTP Verification Test Program VTR Video tape recorder VTR Video Tape Recorder VTR Verification Text Reports VTS Vertical Test Stand VTS Vertical Test Site VTS Vertical Test System VTS Vandenberg Tracking Station VTVM Vacuum Tube Voltmeter VTX Vertex VY Velocity along the Y-Axis [W] W Wide W Watt W West W Window W&B Weight and Balance W&C Wire and Cable W-G Water-Glycol W/ With W/B Wideband W/E Wing Elevon W/G Water/Glycol W/H Watt-Hour W/O Without W/S Work Station W/T Wind Tunnel W/W Wheel Well W/W Weather W/WMS Water/Waste Management System (Subsystem) W/Y Wrist Yaw WA Work Authorization WA Wide Angle WAD Work Authorization Document/Shop Order WAD/NU Work Authorization Number WAR Work Authorization Report WARN Warning WAT Web Action Time WB Waterboiler WBC White Blood Cells WBDI Wideband Data Interleaver WBR Work Bench Rack WBS Work Breakdown Structure WBSC Wide-band signal conditioner WBSC Wide-Band Signal Conditioner WBT Wide-Band Terminal WCCU Wireless crew communication unit WCLS Water coolant loop system WCS Waste collection system WMC Waste management compartment WONG Weight on nose gear WOW Weight on wheels WP Way point WSB Water spray boiler WSGT White Sands Ground Terminal WSTF White Sands Test Facility WTR Western test range WTR Western Test Range WTR SYS Water System WTSC Wet Tantalum Slug Capacitor WTT Wind Tunnel Test WUCF Work Unit Code File WUC Work Unit Code WUSCI Western Union Space Communications, Inc. WW Water Waste WW Wire Wrap WWMS Waste Water Management System WX Weather [X] [Y] [Z] [Additional Acronyms (Unsorted)] i@@PL Implement iSCM JSC Manual icio Interim Cargo Integration Operations icmo "Integrated Configuration I""anagement Office" icms Indirect Cost Management SYstem ico Integrated Checkout icos improved Crew Optical Sight icou Inertial Coupling Data Unit icw Interrupted Continuous Wave iis Joint Integrated Simulation iis InsPection Item Sheet imu Inertial Measurement Unit imu Internal Measurement Unit in. Inch instrument/ instrument/Communication EquiPment ioc Joint Operations Center ioc Indirect Operating Costs ioc Initial Operational Capability ioc Input/Output Controller iocu Input/Output Control Unit iosc Integrated Operations Support Center isc Johnson Space Center (formerly MSC) isi Initial Systems Installation isi Instrumentation support Instruction iso International Standardization Organizations iss Integrated System Schematic iss Instruction Summary Sheet iss Installation Support Services iss Inertial Subsystem iss Inhibit/Override Summary Snapshot Display iu Interface Unit iu instrument Unit ius Inertial UPper Stage (was Interim UPper Stage) ius Interim/intermediate UPper State ius International Ultraviolet ExPlorer ius interim Use Sheet iv Intravehicular iv Interface Volume iv Interior Upper Stage iv integrated Vehicle iv Initial Velocity ivc Intervehicular Communications ivsi Instantaneous Vertical Speed Indicator jp Jet Propulsion jp Jet Propellant jpp Joint Program Plan k Kilo (1000) kHz Kilohertz kV Kilovolt kVA Kilovoltampere kWh Kilowatt Hours kbps kilobits per second kcal Kilocalorie kg Kilogram kgal/min Kilogallons per Minute kib KiloPounds kill Kilowatt km Kilometers lMCC Integrated Mission Control Center landC Instrumentation and Communication lb Pound lc Incremental Cost lc Integrated Circuit lc Information Center lc Interim Change lc Intercomputer lc Intercommunications lc Intercom (Orbiter to Ground via Hardline) lc Ion Chamber lc Internal Combustion lc Initial Condition lcs Instrumentation Control SYstem lcu Inertial Components Temperature Controller lm Inner Maker lm Interface Module lm Intermediate Moisture lm Information Memory lms Information Management System lms Inventory Management System lom Input/Output Module lop Integrated Operation Plan lop In-Orbit Plane lop Input/Output Port lop Input/Output Processor los Input/Output Supervision los InstruCtor Operator Station los Indian Ocean Ship (STDN) lou Input/Output Unit lsu International System of Units lucs Instrumentation Update Command SYstem lucs Instrumentation Unit Update Command System m Monitor (MON preferred) m Number of Revolutions Required for the Rendezvous m Manual m Mercury m Mass m Male m Meter m Missing (Data) m Mach m Matrix m Mandatory m Major Cycle m Maintainability m Million m Mega m Middle m isc Miscel laneous m lss Mission m PSS Main Parachute Support Structure m icom Missile Command (Army) m lcs Management Information and Control system m-kg Meter-Kilogram mA Milliampere mPuter Simu mPuter Simulator mc Memory Configuration mc Mission Capability mc Mission Completion/Continuation mcc Main Combustion Chamber mcc Mission Control Center (JSC) mcc Motor Control Center (JSC) mccc Mission Control and Computing Center mccs Mission Control Center Simulation (System) mco Mission Control Operations mcs Measurements Calibration System mcs Maintenance and Checkout Station mcu Mission Control Unit mcu Master Control Unit mcw Modulated Continuous Wave mg Milligram mi Mile mi Management Information mi Mechanical Joint mic Management Information Center mills Modular Integrated Utility Systems min Minute mio Management Integration Office mios Multi-IMU Operation System mis Mission Information Subsystem mis Management Information System mis Manipulator Jettison System (Subsystem) miu Multiplex Interface Unit mm Main Module mm Major Mode mm Man-Month mm Mass Memory mm Main Memory mm Mission Manager mm Math Model mm Millimeter mmc Martin Marietta Corporation mmc Mission Management Center mmos Multimode Optical Sensor mms Mission Modular Spacecraft mms Modular Multiband Scanner mms Multimission Modular Spacecraft mmu Manned Maneuvering Unit mmu Mass Memory Unit mo Major Objective mo Manned Orbiter mo Middeck Overhead mo Mission Operations mo Manual Orientation mo Master Oscillator mo Move mo Manufacturing Order moc Marine Operation Center moc Mission Operations Computer mocs Multichannel Ocean Color Sensor mocv Manual 02 Control Valve mom Moment mou Memorandum of Understanding mov Main Oxidizer Valve mow Mission Operations Wing msc Manned Spacecraft Center (changed to JSC) msc Master Sequence Controller msc Materials Service Center msc Military Sealift Command msc Moding Sequencing and Control msec Millisecond msi Maintenance Significant Items msi Medium Scale Integration msm Manned Support Module mso Model for Spare(s) OPtimization msocc Multisatellite Operations Control Center mss Multispectral scanner System mss Mobile Service Structure mss Mission Status Summary mss Manufacturers Standardization Society mss Maintenance Status System mss Mechanical Support Systems mss Mission Specialist Station msu Mass Storage Unit msu Measuring Stimuli Units msv Monitored Sine Vibration (Test) msw Microswitch mu Master Unit mu Mobile Unit mu Mockup mu Multiple Unit mums Multiple Use Marc System muss Module Utility Support Structure mux "Multiplex, Multiplexer" mv Manual Valve mv Millivolt mv Manufacturing Verification mvc Master Volume Control mvc Manual Volume Control mvm Mariner Venus/Mercury mvs Middle Value Select mvs Multiple Virtual Storage mw Man Week mw M mw Milliwatt mw M mw Microwave mwv M mwv Maximum Working Voltage mx M mx Multiplex nm Nanometer nmi Nautical mile nt Newton oc Overcurrent oc On Center oc Orbital Check oc Open Circuit oc On-Condition oc Quality Control occ Office of Contract Compliance occ Operations Control Center ocm Organic Content Monitor oco OMS Cutoff oco Open-Close-Open ocs Onboard Checkout System oic Orbiter (Orbital) Integrated Checkout ois Operational Intercommunication System ois Orbiter Instrumentation Systems oiv Oxidizer Isolation Valve oivs Orbiter Interface Verification Set omc Orbiter Maintenance and Checkout omi Operations and Maintenance Instruction oms Orbital Maneuvering Subsystem omu Optical Measuring Unit omv Oxygen Manual Valve oomm Organizational Operations and Maintenance Manual oos Orbit-to-Orbit Stage oos Orbit-to-Orbit Shuttle oos On-Orbit Station os Operating Software os On-Orbit Station os OPtics Subsystem os Operating System os Orbiter CEI Specification osc Oscillator osm Orbital Service Module oso Ocean SYstems Operation oss Orbiting Space Station oss OPtics Subsystems oss Office of Space Science oss OEX SuPport System oui "Quito, Ecuador (STDN)" ov Oxygen Vent ov Orbiter Vehicle ovco Operational Voice Communication Office ovi Operational Validation Inspection ovs Operational Voice System ovv Overvoltage ow Optical Window ox Oxidizer oz Ozone oz Ounce p Pilot p Period p Pitch p Pallet (Spacelab) p Pressure p Pole p Roll Rate (Angular Rate) p Prime p Primary pH Hydrogen-Ion Concentration (Alkalinity) pp Power Pole pp Program Performance pp Push-Pull pp Partial Pressure pp Planning Package ppp Peak Pulse Power psf Pounds per Square Foot psi Pounds per Square Inch (Static Pressure) psi Pounds per square inch psia Pound per Square Inch Absolute psia Pounds per square inch absolute psid Pounds per Square Inch Differential psid Pounds per square inch differential psig Pounds per Square Inch Gage psig Pounds per square inch gauge psis Pounds per Square Inch Sealed py Program Year rad Radiation equivalent dose rem Roentgen equivalent in man rms Root mean square s Stere s Second (Astronomical Tables) s Second s Side s Sta r s@mscc SYstem s@mscc Shuttle Mission Simulator Computer Complex sccm Standard Cubic Centimeters per Minute sci Switch Closure In scis Standard Cubic Inches per Second sco Subcarrier Oscillator sco Stiper Critical Oxygen sco Switch Closure out sco Start Checkout scos Subsystem Computer Operating System scs Secondary Coolant System scs Spacecraft Control System scs Stabilization and Control SYstem (Subsystem) scu Secondary Control Unit scu Sequence Control Unit scu Service and Cooling Umbilical scu Signal Conditioning Unit scu Signal Control Unit sec Second sec Source Evaluation Committee secs Standard Cubic Centimeters per Second si Center Support Operations (KSC Directorate) si International System of Units (ISU preferred) si Solar inertial si Scientific Instrument sim "Simulate, Simulation" sim Scientific Instrumentation Module simo Simultaneously simu Simulated Inertial Measurement Unit sio Systems Integration Office sio Serial Input/output sis Scanning Imaging Spectrometer sis Shuttle Information System sis Serial Input Special sis SAIL Interface System sis Software Implementation Specification sis Software Integrated Schedule sis Standard Interface Specification sis Systems Integration Schedule sis Shuttle Interface Simulator sis SiMUlator Interface SYstem (SubsYstem) siu Signal Interface Unit siv Sieve sm Shuttle Management (KSC) sm SOft Manual sm Support Module sm short Module sm Stable Member sm SYstems Management smc Scientific ManPower Commission smcc Shuttle Mission Control Center smcs Separation Monitor and Control System smcu Separation Monitoring Control Unit smm Solar Maximum Mission smm Subsystem Measurement Management smoc Simulation Mission Operation Computer sms Solar Maximum Satellite sms Separation Mechanism SubsYstem sms Shuttle Mission Simulator sms Synchronous Meteorological Satellite smu SOft Mockup smw Standard Materials Worksheet so SuPport Operations (KSC Dir.) so2 Sulphur Dioxide soc Simulation Operations Center soc Simulation Operation ComPuter soc SYstem OPtion Controller socc Satellite Operations Control Center socs Subsystem Operation and Checkout System som Spares OPtimization Model som Standard Operating Manual som Ship Operations Manager (NASA) soms Shuttle Orbiter Medical System sos Stabilized OPtical Sight sos Source of Supply sos Serial OutPut Special sov Solenoid Operated Valve sov Shut-off Valve sow Statement of Work sow Square Wave sow sox Supercritical Oxygen sow Subdivision of Work sow Start of Word sq ft Square Feet ssc Subsystem Sequence Controller ssc Subsystem Computer ssc Solid-Solution Cermet ssc Single-Stage Command ssc Shuttle System Contractor sscc Support Services Control Center ssi Significant Structural Item ssm Support System Module ssm Systems Support Module ssm SPacecraft Systems Monitor ssm Subsystem Manager sso SuPport System for OEX sso Safety Signification Operation sso Source Selection Official sso Space Shuttle Orbiter sso Subsystem Operation (in Spacelab) sss Sound Suppression System sss Space Shuttle System sss Stage Separation Subsystem sss Station Set Specification sss Subsystem Segment ssss Space Shuttle System Specification ssus Spinning Solid Upper Stage ssv Space Shuttle Vehicle su Support Unit sum Summary sumc Space Ultrareliable Modular Computer summ Summary sums Shuttle Upper-Atmosphere Mass Spectrometer susim Solar Ultraviolet Spectral Irradiance Monitor sv Selenoid Valve sv Space Vehicle sv State Vector sv Shuttle Vehicle sv Safety Valve svc Supervisor Call svo Space Vehicle Operations (KSC Dir.) svs Suit Ventilation System sw Sea Water sw Switcher (Switch) sw Status Word sw Solar Wing sw Software (SFTWE preferred) sw Short Wave sws Switch Scan u Underfloor uc Unsatisfactory Condition ucc Universal Checkout Console ucs Universal Control System ucs UnUtilities Control System umo Unmanned Orbital us Upper Stage us United States usi Update Software Identity uss Utility Support Structure uss United States Ship uss United States Standard uu Micromicron uv Ultraviolet uv Under Voltage (U/V preferred) uv Microvolt uw Microwatt uws User Work Station v P-P Volt Peak-to-Peak vc Velocity Counter vc Vector Character vcc Verification Code Counter vci Velocity Change Indicator vcm Volatile Condensable Material vco Voltage Controlled Oscillator (Oscillation) vcs Verification Control Sheet vcs Voice Command System vcu Video Control Unit vi Internal Velocity vi Vacuum Jacketed vic Visitors Information Center vis Visual vis Verification information System vis Visibility visc Viscosity viu Video Interface Unit vm Voltmeter vm Virtual Memory vms Velocity Measuring system vom Voltohmmeter vox Voice Operated Transmitter (Transmission) vs Staging Velocity vs Versus vsi Vertical Speed Indicator vsi Video Simulation Interface vso Very Stable Oscillator vu Vehicle Unit vu Vehicle Utility vu Volume Unit vv Vent Valve vv Vertical Velocity vvi Vertical Velocity Indicator vx Velocity along the X-Axis vz Velocity along the Z-Axis
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