GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
ISOC Peer Review March 2, 2004
GLAST Large Area Telescope:
ISOC Peer Review
Section 1 Overview
David Lung
Stanford Linear Accelerator Center
ISOC Subsystem Manager
dlung@slac.stanford.edu
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Review Agenda
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Document: LAT-PR-03213-01
Section
1
1.1
1.2
2
2.1
2.2
2.3
3
3.1
3.2
3.3
4
4.1
4.2
4.3
5
6
6.1
6.2
7
7.1
7.2
7.3
Topic
Welcome
Introduction & Review Objectives
ISOC Overview
Requirements
ISOC Requirements
ISOC Development Approach
Verification and Validation
Operations Concept
Instrument Operation
Command and Telemetry Operations
Break
Operations Concept, cont’d
Operation Products
Ground System
Test Bed
Flight Software Maintenance Tools
Pipeline, Data Storage and Networking
Issues for ISOC
Lunch
LOF Facility
Operations Software
Ground Operations Software
Visualization Tools
Break
Science
Pre-launch Operation and Calibration
Science Operation Group
SAS and Data Challenges
Wrap Up & Panel Discussion
Adjourn
Presenter
D. Lung
D. Lung
L. Bator
L. Bator
L. Bator
L. Bator
L. Bator
L. Bator
T. Schalk
T. Schalk
R. Dubois
D. Lung
J. Panetta
J. Panetta
E. Do Couto e Silva
S. Digel
R. Dubois
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Logistic Information
• Bathroom locations
• Lunch and Breaks
Document: LAT-PR-03213-01
Section 1 Overview
3
GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
Document: LAT-PR-03213-01
ISOC Peer Review March 2, 2004
ISOC Peer Review
Introduction & Objectives
Section 1 Overview
4
GLAST LAT Project
ISOC Peer Review March 2, 2004
Review Committee
• Co-Chairs
– Charlie Young (SLAC)
– Mike Rackley (GSFC)
• Committee
– David Bertsch (GSFC - via Telecon)
– Robin Corbet (GSFC)
– Norman Graf (SLAC)
– Neil Johnson (NRL)
– Steffen Luitz (SLAC)
– Bob Schweiss (GSFC)
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
RFAs
• Request For Actions (RFAs)
– We request all RFAs to be submitted via a
committee member
– All RFAs will be review by the co-chairs
– All RFAs will be addressed and closed with the
committee member
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Review History
• IOC Peer Design Review
August 2001
• LAT PDR/Baseline Review
January 2002
• Delta PDR/Baseline Review
July 2002
• LAT CDR/CD3
May 2003
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
What Has Changed Since Last Review?
• GLAST System Operation management at GSFC
• Completion of:
– GLAST Science Support Center Peer Review
– Mission Operations Center Peer Review
• Formulation of the Science Operations Group within
ISOC
• Updated LAT Level II and III to reflect requirement
changes
• ISOC budget was rebaselined
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Review Objectives
• As stated in the review charge
– Requirements properly address the principal
function of the center
– ISOC design maturity, qualification and
verification planning near CDR level
– Open design issues and appropriate closure
plans
• Also
– Are the design, planning, and formulation of the
ISOC properly defined?
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Major SW Release & Review Dates
• ISOC Detail Design Review
May 26, 2004
• LOF SW Release 1
August 19, 2004
Support GRT #2
• LOF SW Release 2
Support GRT #5
September 22, 2005
• Mission Operations Review
October 18, 2005
• Operation Readiness Review
December 15, 2006
• Launch
February 2007
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
Document: LAT-PR-03213-01
ISOC Peer Review March 2, 2004
ISOC Overview
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
GLAST Mission Overview
• GLAST: Gamma-Ray Large Area Space Telescope
• Objective:
– To study high-energy cosmic phenomena with
unprecedented sensitivity. The science is rich and the
variety of sources is diverse; celestial sources of gamma
rays are as close as the moon and Sun and as distant as
forming clusters of galaxies at large redshifts
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Instrument Description
Si Tracker
pitch = 228 mm
8.8 105 channels
18 planes (16 with converters)
g
ACD
segmented
scintillator tiles
e+ e-
CsI Calorimeter
hodoscopic array (8 layers)
6.1 103 channels
LAT: 4 x 4 modular array
3000 kg, 650 W
20 MeV – 300 GeV
Data Acquisition
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
GLAST Overview
Gamma Ray Burst Monitor (GBM)
Spacecraft
Launch Vehicle:
Large Area Telescope (LAT)
Person
Delta II – 2920-10H
Launch Location: Kennedy Space Center
Orbit Altitude:
575 Km
Orbit Inclination:
28.5 degrees
Orbit Period:
95 Minutes
Orientation:
+X to the Sun
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Mission Block Diagram – Mission View
GPS
TLM: Ku-band @ 40 Mbps
S-band @ 1,2,4,8 kbps
CMD: S-band @ .25, 4 kbps
GPS Timing &
Position Data
TLM: S-band @ 2.5 Mbps
CMD: S-band @ 2 kbps
GLAST
RT HK Telemetry
Alerts
Sci & HK Data Dumps
Command Data
RT HK Telemetry
Command Data
HK Data Dumps
Ground Stations
e.g. Wallops, MILA, USN
Spacecraft
I&T
Facility
Spectrum Astro
White Sands Complex
Orbit Support
FDF
GSFC
Level 0 Data
Observing Plan
ToO Orders
As-Flown Timeline
Level 1/2 Data
LAT Commands/Loads
LAT
Instrument
Ops Center
GLAST
Science
Support
Center
GSFC
Science
Community
Gamma-Ray
Coordinates
Network
Level 0 Data
Contingency Cmd
As-Flown Timeline
Burst Alerts
Level 1/2 Data
GBM Commands/Loads
GSFC
GBM
Instrument
Ops Center
Archive
Data
GCN Notices
MSFC/NSSTC
HEASARC
GSFC
Document: LAT-PR-03213-01
GSFC
Burst Alerts
Science
Products
SLAC
Launch
Site
KSC
T&C Data Flows
Mission
Operations
Center
Level 0 Data
Contingency Cmd
As-Flown Timeline
TDRS
Version: 11/19/03
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
Mission Block Diagram – ISOC View
GLAST
TDRS
LAT
Collaboration
Primary
Backup
White Sands Complex
USN, Wallops
Alerts
Raw Data
Instrument Uploads*
Commands*
Ops Data Products
Mission Operations Center
(MOC)
GBM
Level 0
Data
GLAST Burst
Monitor
(GBM) IOC
Level 0 and RT HK Data
Ops Data Products
Alerts
Refined
Alerts
Level 1 and Level 2 Data
Analysis Tools
Raw Data
Commands
Instrument
Uploads
GRB
Coordinates
Network
(GCN)
Refined
Alerts
Schedules and
Commanding
LAT ISOC
LOF
SOG
SAS
Level 1 and Level 2 Data
Analysis Tools
Schedules
Commands
Instrument Uploads
GLAST Science
Support Center
(GSSC)
* test, early orbit, and backup only
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Mission
• Primary Mission
– Science, Science, Science
• Acquisition, Analysis, Calibration, etc…
• Secondary Mission
– Review and maintain LAT Instrument health and safety
• Review and trend health and safety telemetry
• Provide necessary support for contingency operations
– Immediate health and safety operations are handled at the
GLAST-MOC
– Configure and maintain the flight data bases
• Command, telemetry, and calibration
– Instrument command generation and validation
– Archive Level 0 telemetry packets and higher-level products
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
To Meet The Mission
•
•
•
•
An Ad Hoc Working Group was formed to review the Instrument
Operations Center (IOC) implementation plan
Members of the Working Group are: S. Digel (chair), E. do Couto e
Silva, R. Dubois, P. Nolan, H. Tajima (with participation from S. Ritz,
instrument scientist)
Charge to the working by the Project PI
–
Examine the plans to date for the IOC and, in particular, assess the adequacy of the IOC
plan for serving the science needs of the collaboration.
–
Develop an operational picture/description that illustrates the role of each IOC element
and the relationships between the elements.
–
Develop a strawman staffing plan that identifies needed full-time (and part-time)
scientists, engineers, technicians, etc. Consideration should be given to how I&T
activities will eventually phase out and the IOC will become fully operational.
–
Examine examples from other space astrophysics missions (e.g. CGRO/EGRET, SWIFT,
Chandra, RXTE, SOHO/MDI., etc.) to understand the “lessons learned” and apply them
in the context of GLAST
The committee recommendations have been adopted and reflected
throughout this presentation
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Functional Architecture
Mission Operations Center
GLAST Science Support Center
LAT Instrument Science Operations Center (ISOC)
Level 1, Level 2 (e.g.,
updated trans. alerts)
Level 0 Data
Health
& Safety
HSK
Data Processing
HSK
Operations &
Commanding
Flight
Software
Monitoring
& Diagnostics
Instrument
Performance
Response
Functions
Instrument
Optimization
Calibrations
SAS
Data Transfer
Reports and Information
LAT ISOC
Steering Committee
Document: LAT-PR-03213-01
Support Functions Through Deliverables
Advisory and/or Revision Role
LAT Science
Analysis
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Elements & Functions
LAT IOC Manager
LATOperations
Operations Facility
LAT
Facility
ScienceOperations
OperationsGroup
Group
Science
ScienceAnalysis
AnalysisSoftware
Software
Science
Operations Planning
and Commanding
Instrument
Performance
Monitoring
Simulation/Recon
Health & Safety Monitoring
Monitoring
& Diagnostics
Software Infrastructure
Flight Software
Calibrations
Science Tools
Optimization
Processing Server
Data Processing
Science Support
Transient Source Alerts
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Elements Description
• LAT Operations Facility (LOF)
– Responsible for day-to-day operations of the LAT instrument and
facility
– Generate and coordinate commanding plans for the LAT instrument
• Science Operations Group (SOG)
– Supports LAT instrument calibration activities
– Performs LAT instrument activity planning, trending & performance
analysis and anomaly investigation
– Performs sustaining engineering for the LAT instrument
• Science Analysis Software (SAS)
– Performs higher level data processing (Level 1 & 2) using Level 0
data provided by MOC, and provides data products to the GSSC
– Archives and distributes science data products (for LAT
collaborations)
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Organization
Instrument Science Operations Center
WBS: 4.1.B
D. Lung (Acting)
SLAC
LAT
Performance
Assurance
LAT Operations Facility
L. Bator, SLAC
Science Operations Group
TBD
Mission (Instrument)
& Ops Planning
L. Bator, SLAC
SOG Physicist/Engr
A. Borgland*
X. Chen*
Facility Engineering
SW - J. Panetta*
SW - TBD
Network – TBD
Systems – TBD
Physicists/Engineers
transfer from I&T
Operations Integrated
Product Team
SU-HEPL, SU-SLAC, GSFC,
NRL, UCSC
Science Analysis Software
R. Dubois
SAS Physicist/Engr
TBD
TBD
Console Operators
transfer from I&T
FSW & Test Bed
J.G. Thayer*
J.B. Thayer*
Document: LAT-PR-03213-01
SAS Physicist/Engineers
transfer from SAS 4.1.D
* Matrixed to other Subsystems
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Design Approach
•
ISOC design approach is to use as much as possible of the software and
tools developed by Electronics, I&T and SAS
– Many of the ISOC physicist and engineers are matrixed with other LAT
subsystems to gain experience
•
LOF
– ISOC ground software and operational tools will be developed and derived in
coordination with I&T efforts
– Command and telemetry database will be developed in coordination with I&T
efforts
– LOF team will include technicians, engineers and programmers who were
involved with I&T throughout the instrument integration and testing
•
SOG
– Draw from Science Verification Analysis and Calibration (SVAC) pre-launch
efforts
– Use analysis tools, instrument simulation, and processing pipeline
developed by SAS
– Use or develop additional operational tools from tools used for I&T
– SOG personnel will include scientists and programmers who were involved
with I&T
•
SAS
– Experienced scientists and programmers who have developed the data
processing, simulation/reconstruction, science tools and databases in
support of Data Challenges and I&T
Document: LAT-PR-03213-01
Section 1 Overview
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GLAST LAT Project
ISOC Peer Review March 2, 2004
ISOC Development Flow
Subsystem
Development Phase
Subsystem
Acceptance Test
Phase
(EM development &
testing)
(Including QUAL Model)
TKR
(4.1.4)
TKR
(4.1.4)
CAL
(4.1.5)
CAL
(4.1.5)
LAT I&T Phase
On-Orbit
Operations
LAT
LAT
MOC
Integration
and
Acceptance
Test
ACD
(4.1.6)
ACD
(4.1.6)
Electronics
(4.1.7)
Electronics
(4.1.7)
I&T
(4.1.9)
I&T
(4.1.9)
I&T developed the
necessary scripts
and tools to test the
subsystems
I&T scripts, tools,
and databases used
for subsystem
testing
I&T, SVAC, SAS
develop tools used
for LAT instrument
integration and test
 Finalize
requirements and
interfaces
 Develop LAT
operation plan
 Develop telemetry
displays, command
scripts, and
databases
 Start interface
verifications
 Support I&T effort
to gain hands on
experience
 Continue interface
verifications
 Start operation
simulation
 Develop SOG
analysis tools
Document: LAT-PR-03213-01
Observatory I&T
Phase
Spacecraft
LAT-IOC
Start transition of
I&T personnel to
ISOC
Full operations
 Complete operation
simulation
 Support end-to-end
test
 Support mission
simulation
Section 1 Overview
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