GLAST Large Area Telescope: Instrument Science Operations Center CDR
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GLAST LAT Project ISOC CDR, 4 August 2004 Document: LAT-PR-04500 Section 3.2 1 GLAST Large Area GLAST Large Area Telescope: Telescope: Instrument Science Operations Instrument Science Operations Center Center CDR CDR Section 3.2 Instrument Flight Software Jeff Fisher FSW Manager Gamma-ray Large Gamma-ray Large Area Space Area Space Telescope Telescope
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Gamma-ray Large Area Space Telescope. GLAST Large Area Telescope: Instrument Science Operations Center CDR Section 3.2 Instrument Flight Software Jeff Fisher FSW Manager. FSW Team Mission. FSW team is responsible for Design and delivery of FSW (pre-delivery) - PowerPoint PPT Presentation
Transcript of GLAST Large Area Telescope: Instrument Science Operations Center CDR
GLAST LAT Project ISOC CDR, 4 August 2004
Document: LAT-PR-04500 Section 3.2 1
GLAST Large Area Telescope:GLAST Large Area Telescope:
Instrument Science Operations CenterInstrument Science Operations CenterCDRCDR
Section 3.2Instrument Flight Software
Jeff FisherFSW Manager
Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope
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Document: LAT-PR-04500 Section 3.2 2
FSW Team MissionFSW Team Mission
FSW team is responsible for
• Design and delivery of FSW (pre-delivery)
• Processing Software Change Requests (SCRs) (postdelivery)– Providing software updates– Validation and Verification (V&V) of all software changes by ISOC
Test Team
• Maintenance of the Instrument Test Bed– V&V of SCRs– V&V of command sequences– Investigatation of anomalies
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Document: LAT-PR-04500 Section 3.2 3
Relation between FSW and ISOCRelation between FSW and ISOC
• Through FSQ– Coding the software that will operate the LAT– Testing the software– Configuration management– Development of Test Bed
• Beyond FSQ– Continue code/test/CM cycle as part of the ISOC operations– Maintenance of Test Bed– Review commanding, HK, and performance on a frequent
and regular basis
GLAST LAT Project ISOC CDR, 4 August 2004
Document: LAT-PR-04500 Section 3.2 4
FSW Testbed Block DiagramFSW Testbed Block Diagram
1553 Rx service
Spacecraft Interface Unit
Q
Q
Q
Q
Q
Q
Masters
1553 Tx service LCB Tx service
SC Att./Time
Watchdog
File/Object
HSK
Instr. Phys.
LCB Rx service
Other Tasks
Q
Q
Q
Slaves
SC Att./Time
File/Object
HSK
1 PPSInterrupt
GBM Interrupt
Event Processing Unit(s)
QLCB Tx service
LCBRx
Q
Other Tasks
Q
Q
Q
Slaves
SC Att./Time
File/Object
HSK
MSGservice
QInstr. Phys.Q
Event Builder (EB) output side. The EB is an element of the GASU.
To EPU(s)To SSR
Event Builder (EB) input side. The EB is an element of the GASU.
Command/Response Unit (CRU). The CRU is an element of the GASU.
From SIU From EPU(s) Event Assembly
“SolidState
Recorder”
SIIS
1553
LAT Instrument
Legend
Telecommand (SC to LAT)
Telemetry (LAT to SC)
Master to slave
Slave to master
Physics data from LAT
Data to SSR
Command/Response
Discretes(to SIU PIDs)
To SIU
TCS
QWatchdog
QWatchdog
MSGservice
1 PPSInterrupt
Sensorsreplaced with
Front EndSimulators
(FES)
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Document: LAT-PR-04500 Section 3.2 5
Technical ApproachTechnical Approach
• FSW is LAT controller– Philosophy is to do what must be done in real time onboard
but defer more complicated decisions to ISOC on ground– Provides a high level interface to control LAT
• FSW development is following an iterative model– Functionality is developed and tested against available HW– Errors are corrected– Additional functionality is developed and validated against
newer hardware
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Document: LAT-PR-04500 Section 3.2 6
FSW Update ProcessFSW Update Process
• 1) Software Change Request Issued• 2) Investigate SCR
– a) Action required?• If NO, close SCR with explanation
• 3) Design FSW Revision/Update• 4) Review the Design of FSW Revision/Update
– a) Design acceptable?• If NO, return to Step 3
• 5) Produce Revised Code• 6) Review Revised Code
– a) Code acceptable?• If NO, return to Step 3 or Step 5
• 7) Test Revised Code against Testbed– a) Test passed?
• If NO, return to Step 3 or Step 5• 8) Deliver Update• 9) Close SCR
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FSW StatusFSW Status
• Team is in place
• Flight Unit level coding is underway
• SW Integration phase is Q4– Builds produced as needed to support I&T
• SW Test Scripts underway, completion in Q4
• FSW Qualification Testing begins January 2005
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FSW TeamFSW Team
• JJ Russell – architect, event SW designer
• Tony Waite – technical lead, ITC designer
• Sergio Maldado – Housekeeping, Cmd Telemetry
• James Swain – LATC, DAQ, LEM
• Steve Mazzoni – Watchdog, Thermal Control, ISIS
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FSW Team (cont’d)FSW Team (cont’d)
• Ed Costello – Charge Injection Calibration
• Ed Bacho – LCB driver, ISIS
• Owen Saxton – FES Simulation
• Kim Lo- CM/builds
• Mark Arndt – Documentation
• Rich Morin – Web Pages/Doc
• NRL – Boot, File System, Attitude Processing
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FSW Test ProcessFSW Test Process
• Allocate mission requirements to FSW– 198 Requirements have been identified
• Develop FSW Test Plan – All requirements are mapped to test procedures– The set of procedures contains scripts that demonstrate the
requirements
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FSW Test StatusFSW Test Status
• Draft of LAT SW Test Plan created– All mission requirements applicable to FSW have been
allocated– Requirements have been allocated to test procedures– HW requirements for the test procedures have been
identified– Test development schedule is in place
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FSW Test Team - Current FocusFSW Test Team - Current Focus
• Eric Hansen (Lead, ISIS, modes, diagnostics)
• Igor Kouzenko ( TKR, CAL,ACD)
• Tbh1 (commands, telemetry, initialization)
• Tbh2 (physics)
