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GSE & Science Data Processing. Stewart Harris. Outline. Description of instrument data products Mission data flow Ground Support Equipment. ISUAL Source Packet Types. Utility Packets Types Housekeeping Time Instrument status Voltage/Current/Temp HV Settings State Group Dump

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Presentation Transcript
outline
Outline
  • Description of instrument data products
  • Mission data flow
  • Ground Support Equipment

NCKU UCB Tohoku GSE & Science Data S. Harris

isual source packet types
ISUAL Source Packet Types
  • Utility Packets
    • Types
      • Housekeeping
        • Time
        • Instrument status
        • Voltage/Current/Temp
      • HV Settings
      • State Group Dump
      • NVRAM Dump
      • Memory Dump
      • Command Echo
      • Idle
  • Science Data Packets
    • Types
      • Sprite images
      • Aurora images
      • Sprite AP data
      • Aurora AP data
      • Sprite SP data
      • Aurora SP data
    • All time tagged
    • All parameterized
    • Compressed or Uncompressed data packets are supported

NCKU UCB Tohoku GSE & Science Data S. Harris

isual data encapsulation
ISUAL Data Encapsulation

Data Products

(either Science data or Utility data)

CCSDS Source Packets

PVCF

64 Mbit blocks

Spacecraft

NCKU UCB Tohoku GSE & Science Data S. Harris

ground support equipment gse
Ground Support Equipment (GSE)
  • Spacecraft (S/C) simulator
    • Simulates S/C interface
      • Science data telemetry (source packets encoded as PVCFs)
      • Status data telemetry (low speed SOH data encoded as PVCFs)
      • Command channel
    • Supports same data protocol as used during flight
      • CCSDS
      • PVCF
      • Command scripting language (STOL?)
  • Protocols used during flight and during testing should be identical
  • Scripting language should also be identical

NCKU UCB Tohoku GSE & Science Data S. Harris

mission data flow proposed
Mission Data Flow - Proposed

NCKU UCB Tohoku GSE & Science Data S. Harris

front end data system
Front End Data System
  • Receives S/C telemetry, during flight
  • From PVCF stream, reassembles ISUAL source packets, sends to ISUAL data server
  • Accepts Command scripts (STOL?), uplinks commands to S/C

NCKU UCB Tohoku GSE & Science Data S. Harris

spacecraft simulator
Spacecraft Simulator
  • Accepts PVCF from ISUAL (on ground)
  • Accepts Command scripts (STOL?) and passes commands to ISUAL (on ground)
  • From PVCF stream, reassembles ISUAL source packets, sends them to ISUAL data server
  • Provides real-time decoding of “status” channel (low-speed SOH)

NCKU UCB Tohoku GSE & Science Data S. Harris

isual data server
ISUAL Data Server
  • Receives CCSDS source packets via socket connection
    • Source can be GSE or Front End Data System
  • Writes source packet archive
  • Builds science products; saves in archive
  • Retrieves data from either archive
  • Runs web server, supports a group of data viewers and calibration programs (Java?)
  • Runs socket server to provide data to user applications running remotely (e.g. Java/C++/IDL)

NCKU UCB Tohoku GSE & Science Data S. Harris

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