NASA Photo ID: STS056-151-257      File Name: 10072704.jpg
  Film Type: 4x5                     Date Taken: 04/17/93
  Title: STS-56 Discovery, OV-103, payload bay (PLB) with ATLAS-2 pallet & SPARTAN-201
  Description:
  During STS-56 with Discovery, Orbiter Vehicle (OV) 103, in an atmospheric 
  monitoring attitude, the Atmospheric Laboratory for Applications and
  Science  2 (ATLAS-2) unpressurized spacelab pallet and the mission peculiar
  support  structure (MPESS)-mounted Shuttle Pointed Autonomous Research Tool
  for  Astronomy 201 (SPARTAN-201) are visible in the payload bay (PLB). 
  ATLAS-2  equipment and instruments include: the igloo (center foreground,
  only the  top visible); the inverters and pump package (far right); port
  conical scan  sensor (next to pump package at far right); the
  millimeter-wave atmospheric  sounder (MAS) antenna (dish-shaped device at
  pallet center); the starboard  conical scan sensor (small cylinder at far
  left); and the atmospheric trace  module spectroscopy (ATMOS) (box behind
  conical sensor at far left).  Smaller  ATLAS-2 instruments located in the
  center of the pallet include (left to  right): Active Cavity Radiometer
  Irradiance Monitor (ACRIM or ACR); Solar  Constant Instrument (SOLCON);
  Solar Spectrum Instrument (SOLSPEC); and MAS  (large box just below
  antenna).  The SPARTAN-201 is visible behind and above  the ATLAS-2 pallet. 
  SPARTAN-201 will be released during the mission into a  freeflying period
  and returned to its stowage area for return to Earth.   Remote manipulator
  system (RMS) arm (out of frame) is deployed from its  position on the port
  sill longeron.  OV-103's vertical tail points to the  Earth's surface below
  and an oblique view south of Korea.  
  
  Subject terms:
  ATMOSPHERIC PHYSICS                     
  DISCOVERY (ORBITER)                     
  EARTH ATMOSPHERE                        
  EARTH LIMB                              
  EARTH OBSERVATIONS (FROM SPACE)         
  KOREA                                   
  PALLETS                                 
  PAYLOAD BAY                             
  SOLAR PHYSICS                           
  SPACE SHUTTLE PAYLOADS                  
  SPACEBORNE ASTRONOMY                    
  SPACEBORNE EXPERIMENTS                  
  SPARTAN SATELLITES                      
  STS-56                                  
  TAIL ASSEMBLIES                         
  

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