Gaia
GAIA.ASU.SP.ESM.00007
Issue 2.00
Page 10 of 79
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GAIA.ASU.SP.ESM.00007 (Avionics SCOE Req Iss 2).doc
3 AVIONICS SCOE REQUIREMENTS
3.1 System Level Definition
AVI-4006/GSE-SYS-390/R
2 sets of Avionics SCOE shall be provided:
• Set #1 for AVM.
• Set #2 for Spacecraft PVM AIT.
AVI-4007/CREATED/R
Both sets of Avionics SCOE shall be identical, with the exception that only Set #1 shall provide Power
Simulation, as defined in Section 3.6.1 and Section 3.6.2.2.
The Avionics SCOE comprises the following major items:
An Avionics SCOE Controller - see Section 3.2
Application Software with MMI - see Section 3.9
Instrumentation cards to fulfil each of the Spacecraft interface requirements - see Section 3.6
An interface with the Gaia Central Checkout System (CCS) - see Section 3.7
Interfaces to the Gaia Real Time Simulator (RTS), Star Tracker SCOE's and Dynamic FPA Simulator - see
Section 3.8
AVI-210/CREATED/R
Where possible, the Instrumentation cards providing the Spacecraft and EGSE Interfaces shall be
based on COTS products (i.e., VME, VXI, PXI, GPIB) or previously developed in-house systems.
AVI-221/CREATED/R
Instrumentation shall be provided by the Avionics SCOE to fulfil the following Spacecraft Interface and
EGSE requirements, as detailed in the following sections:
Spacecraft Power Simulation (LCL/FCL) - Avionics SCOE Set #1 only
MIL-STD-1553B BUS Data Simulation, Acquisition and Spy (CDMU-SVM and CDMU-PLM BUS)
SpaceWire BUS Data Simulation, Acquisition and Spy (CDMU-EIU)
PacketWire BUS Data Simulation, Acquisition and Spy (CDMU-PDHS)
Combined CPS - command acquisition and status
Combined MPS - command acquisition, status and flow simulation
Pressure Transducer simulation (part of CPS and MPS)
Fine Sun Sensor HWIL Stimulation
Fine Sun Sensor Simulation
Gyro HWIL Stimulation
Standard High Power (SHP) command generation
Standard High Power (SHP) command acquisition
Alarm simulation
Bi-level TM Status simulation
Relay Status simulation
Analog Voltage simulation
Spacecraft Radiation Environmental Monitor (SREM) simulation
EGSE Synchronisation Pulse
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