NASA Photo ID: STS039-367-006      File Name: 10064167.jpg
  Film Type: 35mm                    Date Taken: 05/06/91
  Title: STS-39 Critical Ionization Velocity (CIV) gas release from OV-103 payload bay
  A plume of nitrous oxide gas is released from a compressed gas canister 
  mounted on the increased capacity adaptive payload carrier 1 (ICAPC-1)  on
  the forward port side of Discovery's, Orbiter Vehicle (OV) 103's, payload 
  bay (PLB).  The gas release is part of the Critical Ionization Velocity
  (CIV)  experiment conducted during STS-39. The Shuttle Pallet Satellite II
  (SPAS-II)  "parked" about two kilometers (km) away, is taking infrared,
  visible, and  ultraviolet radiometric spatial, spectral, and temporal
  measurements of the  gas plumes.  Surrounding the CIV ICAPC-1 are: the
  ICAPC-2 payload support  subsystem, radiometer, and Langmuir probe also
  mounted on the port side; the  Space Test Payload 1 (STP-1) multipurpose
  experiment support structure  (MPESS) (just beyond gas beam); and the Air
  Force Program 675 (AFP-675)  experiment support structure (ESS).          
  Subject terms:
  COMPRESSED GAS                          
  DISCOVERY (ORBITER)                     
  NITROUS OXIDES                          
  PAYLOAD BAY                             
  SPACEBORNE EXPERIMENTS                  

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