RBSP Radiation Belt Storm Probes RBSP Radiation Belt Storm Probes 3-4 Sept. 2008EFW INST+SOC PDR447 Command, Telemetry, and Ground Support Equipment (CTG) RBSP EFW CTG Will Rachelson UC Berkeley Space Sciences Lab

Sept. 2008EFW INST+SOC PDR 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

Sept. 2008EFW INST+SOC PDR 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: 1.Support instrument and spacecraft integration and test (I&T). 2.Provide the communications layer to and from the MOC as required by the MOC-SOC ICD. 3.Monitor basic instrument state of health (SOH) through the production of quick-look and trended SOH products.

Sept. 2008EFW INST+SOC PDR 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.

Sept. 2008EFW INST+SOC PDR 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)

Sept. 2008EFW INST+SOC PDR 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)

Sept. 2008EFW INST+SOC PDR 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.

Sept. 2008EFW INST+SOC PDR 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

Sept. 2008EFW INST+SOC PDR 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.

Sept. 2008EFW INST+SOC PDR 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).

Sept. 2008EFW INST+SOC PDR GSEOS 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 Screenshot of GSEOS during DCB Breadboard Testing

Sept. 2008EFW INST+SOC PDR 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