NSSC-I Hardware

• NSSC-I is the computer that is a major element of the SIC&DH (Science Instrument Command and Data Handling System)

  • SIC&DH has two redundant NSSC-Is, only one can be on at a time
  • SIC&DH has two redundant STINTs (interface units), paired with the NSSC-Is
  • Redundant unit has been off since launch
  • SIC&DH has 8 memory units, each with 8k 18 bit words

    • Either NSSC-I can access full complement of memory

• SIC&DH hardware provides other standard services for SIs, under control of NSSC-I

  • Gathers science data from SIs and forwards on to spacecraft for recording or downlink
  • Gathers and formats engineering data from SIs and forwards on to NSSC-I and spacecraft
  • Provides command paths to SIs

Previous slide

Next slide

Back to first slide

View graphic version