Gse science data processing
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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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GSE & Science Data Processing

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Gse science data processing

GSE & Science Data Processing

Stewart Harris


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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