NASA Photo ID: S92-34603           File Name: 10072665.jpg
  Film Type: 120mm                   Date Taken: 04/28/92
  Title: STS-53 Discovery, OV-103, DOD Hercules digital electronic imagery equipment
  Description:
  STS-53 Discovery, Orbiter Vehicle (OV) 103, Department of Defense (DOD)
  mission Hand-held Earth-oriented Real-time Cooperative, User-friendly, 
  Location, targeting, and Environmental System (Hercules) spaceborne 
  experiment equipment is documented in this table top view.  HERCULES is a 
  joint NAVY-NASA-ARMY payload designed to provide real-time high resolution 
  digital electronic imagery and geolocation (latitude and longitude 
  determination) of earth surface targets of interest. HERCULES system
  consists  of (from left to right): a specially modified GRID Systems
  portable computer  mounted atop NASA developed Playback-Downlink Unit (PDU)
  and the Naval  Research Laboratory (NRL) developed HERCULES Attitude
  Processor (HAP); the  NASA-developed Electronic Still Camera (ESC)
  Electronics Box (ESCEB)  including removable imagery data storage disks and
  various connecting cables;  the ESC (a NASA modified Nikon F-4 camera)
  mounted atop the NRL HERCULES  Inertial Measurement Unit (HIMU) containing
  the three-axis ring-laser gyro.         
  Subject terms:
  ATTITUDE INDICATORS                     
  CAMERAS                                 
  COMPUTERS                               
  ELECTRO-OPTICAL PHOTOGRAPHY             
  ELECTRONIC STILL CAMERA                 
  INERTIAL PLATFORMS                      
  PHOTOGRAPHIC EQUIPMENT                  
  PORTABLE EQUIPMENT                      
  SPACEBORNE EXPERIMENTS                  
  STS-53                                  
  STS-56                                  
  

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