Electrical Ground Support Equipment Verification Test Support Tom Leisgang Orbital Network Engineering tleisgang@orbitalnetwork.com
EGSE Functions Provide common infrastructure Command and control, including test procedures Telemetry acquisition, archive, and distribution Health, status, and data quality monitoring Support data visualization tools Support subsystem engineering displays and EGSE Support subsystem development Trigger & dataflow system Flight software testbed ACD, CAL, and TKR subsystems I&T Support integration and test Verification Testing Qualification/Calibration Unit I&T Subsystem receiving inspections LAT I&T including environmental testing Mission Systems Integration & Test
EGSE Requirements EGSE requirements are traceable to several sources LAT Trigger & Dataflow Specification LAT Flight Software Performance Specification LAT IOC Performance Specification LAT Performance Specification LAT Verification Plan LAT Integration & Test Plan Subsystem Integration & Test Plans LAT IOC Verification Plan SI-SC Interface Requirements Document, 433-IRD-0001 GLAST Mission Assurance Requirements, 433-MAR-0001 EGSE must support testing to verify requirements
Dataflow Performance Verification Matrix Verification Types: T: Test; I: Inspection; A: Analysis; D: Demonstration; Test /Measurement Types: F: Functional; P/F: Pass/Fail; P: Performance; Ti: Time; DR: Data Rate; An: Analog; Dg: Digital
Dataflow Performance Verification Matrix
Dataflow Performance Verification Matrix
Dataflow Performance Verification Matrix
LAT Electronics Subsystems
LAT EGSE Functional Block diagram
EGSE Operational Components DC Power Analog Measurement Voltage, Current, Resistance, Temperature Serial / Digital Communications LAT communications interfaces 1553 Data Bus Emulates spacecraft bus communications Signal Capture & Processing Waveform measurement & analysis Digital & Timing Timing Analysis, LAT discrete commands SLAC Custom TKR/CAL/DAQ Subsystem test signal processing
EGSE Software Drivers Interface emulators Test system control software SLAC custom electronics COTS data acquisition products Interface emulators TEM Global trigger Event processors SIU Test system control software Configuration Script execution Data communications Test executive Test performance Reporting
EGSE Test Configurations TKR/CAL Emulates TEM I/F + Power TEM,ACD,EPU Emulates SIU, GT + Power GT Emulates SIU, TEM,ACD,EPU +Power SUI & Housekeeping Emulations: Spacecraft Bus I/F LAT Communications LAT Command & Control