Command telemetry and ground support equipment ctg
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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)

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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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