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RBSP EFW CTG. Command, Telemetry, and Ground Support Equipment (CTG). Will Rachelson UC Berkeley Space Sciences Lab [email protected] Outline of CTG Topics. CTG Requirements and Functions GSE during Instrument Integration and Test Board-level configurations

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command telemetry and ground support equipment ctg
RBSP EFW CTG

Command, Telemetry, andGround Support Equipment(CTG)

Will Rachelson

UC Berkeley Space Sciences Lab

[email protected]

EFW INST+SOC PDR

outline of ctg topics
Outline of CTG Topics
  • CTG Requirements and Functions
  • GSE during Instrument Integration and Test
    • Board-level configurations
  • GSE Backplane Interface Board
  • CTG MOC Interface
  • GSEOS
  • GSE-Related Milestones and Progress

EFW INST+SOC PDR

functions of ctg
Functions of CTG
  • CTG design driven by requirements described in:
    • Project Data Management Plan
    • SOC Software Development Plan
    • MOC-SOC ICD
    • SOC Requirements Document
    • EFW Subsystem Specification Docs
    • The Matrix (Section 15 = GSE)
  • Primary Functions of the CTG:
    • Support instrument and spacecraft integration and test (I&T).
    • Provide the communications layer to and from the MOC as required by the MOC-SOC ICD.
    • Monitor basic instrument state of health (SOH) through the production of quick-look and trended SOH products.

EFW INST+SOC PDR

instrument integration and test
Instrument Integration and Test
  • This is the general configuration of the GSE used to bring up the individual boards of the IDPU, as well as in testing the integrated IDPU.
  • IDPU boards have low level hardware interfaces, so GSE Backplane Interface Board is needed to control them from the GSE PC.
  • GSE PC runs GSEOS, which is extended to talk to devices such as the GPIB test equipment, the Backplane Interface Board, and the Spacecraft Emulator.

EFW INST+SOC PDR

gse supporting beb testing
GSE Supporting BEB Testing
  • DCB not yet available to command the BEB, so GSE I/F board acts as a DCB. Devices under test housed in VME card cage.
  • Allows GSE to make DC and AC transfer function measurements (gain, offset, phase, DAC calibration) on the combined Sensor/Preamp/BEB system.
  • GPIB-controlled signal generator provides semi-realistic stimulus to BEB sensor inputs.
  • “SciCal GSE” provides the functionality of relevant sections of the LVPS.
  • GSE laptop uses GSEOS to command low-level hardware interfaces (GPIB, USB)

EFW INST+SOC PDR

gse supporting dcb testing
GSE Supporting DCB Testing
  • This configuration is for testing the DCB by itself, primarily to exercise the DCB’s flight software.
  • Backplane Interface board provides I/O to DCB (as DFB for test pattern generation).
  • Spacecraft Emulator provides communication with DCB through S/C Interface
  • GSE laptop uses GSEOS to command low-level hardware interfaces (GPIB, USB)

EFW INST+SOC PDR

gse supporting pcb lvps testing
GSE Supporting PCB (LVPS) Testing
  • GSE used to program the LVPS’s shift register to command motors/actuators, as well as read back housekeeping values.
  • Backplane Interface board provides I/O to PCB (as DCB).
  • GSE laptop uses GSEOS modules to command the LVPS modes.

EFW INST+SOC PDR

gse supporting idpu level integration
GSE Supporting IDPU Level Integration
  • This configuration is the three previous setups combined into one.
  • Primary GSE interface at this level is through the S/C Emulator.
  • GSE Computer can command optional test equipment as needed for test procedures

EFW INST+SOC PDR

gse backplane i f board
GSE Backplane I/F Board

Interface board from THEMIS

  • Allows GSE PC to command individual boards over a USB interface – an FPGA receives commands from the PC, performs low-level I/O, and sends back data.
  • Many circuits duplicated from the DCB.
  • Separate Power Supply to reduce noise.

EFW INST+SOC PDR

ctg moc interface configuration overview
CTG MOC Interface Configuration Overview
  • Command interface to MOC via TCP/IP (1 per S/C)
  • Generate validated instrument commands and upload to MOC queues for execution
  • Receive science and housekeeping data from the MOC
  • Monitor Instrument state of health, respond to alerts
  • Process data and distribute products
  • On-Orbit Realtime Ops
  • Verify correct UTC<->MET time conversions
  • Equipment located in IT-secure area (authorized user list).

EFW INST+SOC PDR

gseos
GSEOS

Screenshot of GSEOS during DCB Breadboard Testing

  • Standard features:
    • ITF, CCSDS formats
    • Logging
    • Trending displays
    • Limit Checking
    • Command Encoding
    • Telemetry Decoding
    • Scripting (STOL/Python)
    • Multiple views
  • EFW Customizations:
    • Populated Command/Telemetry database with limit definitions
    • Notification/paging mechanisms
    • Low level routines to talk to GBIP test equipment and other hardware
    • Scripts used for testing
    • MOC interface as specified in MOC-SOC ICD

EFW INST+SOC PDR

ctg milestones and status
CTG Milestones and Status

Milestones:

  • DCB ETU Testing – Oct 2008
    • Requires: GSE I/F Board, GSEOS basic features, S/C Emulator
  • BEB ETU Testing – November 2008
    • Requires: SciCal GSE, GSEOS BEB extensions, GSE I/F Board
  • LVPS ETU Testing – November 2008
    • Requires: GSE I/F Board, GSEOS LVPS extensions
  • IDPU ETU – Delivery to I&T Feb 2009
    • Requires: GSEOS EFW extensions, S/C Emulator
  • Status:
  • GSE I/F Board:
    • Schematic completed, ready for layout
  • GSEOS:
    • Basic features already used with S/C Emulator to test DCB Breadboard (July 2008)
    • Displays decoded CCSDS packets and raw data
    • Needs to be extended to command the GSE I/F board, GPIB hardware, decode EFW telemetry, encode commands, communicate with MOC, etc.
  • S/C Emulator:
    • APL Mini-Emulator delivered and tested with DCB breadboard.
  • BEB SciCal GSE:
    • Bench power supplies purchased

EFW INST+SOC PDR

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