GLAST Mission - LAT Project
Gamma-ray Large
Area Space
Telescope
DOE/NASA Review March 31, 2004
GLAST Large Area Telescope:
ISOC Subsystems
WBS: 4.1.B
David Lung
Stanford Linear Accelerator Center
ISOC Deputy Manager
dlung@slac.stanford.edu
Section ISOC 1
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
• ISOC Peer Review
March 2004
Section ISOC 2
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
Significant Changes Since Last Lehman Review?
•
•
GLAST Ground System
Operation management team in
placed
Completed element peer
reviews:
– GLAST Science Support
Center Peer Review
– Mission Operations Center
Peer Review
– Instrument Science
Operations Center Peer
Review
Potential Site – KIPAC building at SLAC
• A Working Group was formed to review the Instrument Operations
Center (IOC) implementation plan
– Formulation of the Science Operations Group within ISOC
• Rebaselined the ISOC budget
• Bill Craig is acting ISOC manager
Section ISOC 3
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
Ground Stations
GLAST
RT HK Telemetry
Alerts
Sci & HK Data Dumps
Command Data
RT HK Telemetry
Command Data
HK Data Dumps
e.g. Wallops, MILA, USN
Spacecraft
I&T
Facility
Spectrum Astro
Level 1/2 Data
LAT Commands/Loads
LAT ISOC
GLAST
Science
Support
Center
GSFC
FDF
Science
Community
GSFC
Burst Alerts
Gamma-Ray
Coordinates
Network
Level 0 Data
Contingency Cmd
As-Flown Timeline
Burst Alerts
Level 1/2 Data
GBM Commands/Loads
Archive
Data
Science
Products
SLAC
Launch
Site
KSC
Orbit Support
GSFC
Level 0 Data
Observing Plan
ToO Orders
As-Flown Timeline
White Sands Complex
T&C Data Flows
Mission
Operations
Center
Level 0 Data
Contingency Cmd
As-Flown Timeline
TDRS
GSFC
GBM
Instrument
Ops Center
GCN Notices
MSFC/NSSTC
HEASARC
GSFC
Version: 11/19/03
Section ISOC 4
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
Section ISOC 5
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Mission
• Science
• Acquisition, Analysis, Calibration, etc…
• 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
GLSAT-MOC
• Configure and maintain the instrument’s flight software and
ground data bases
• Instrument flight (on-board) software configuration
• Command, telemetry, and calibration
• Instrument command generation and validation
• Archive Level 0 telemetry packets and higher-level products
Section ISOC 6
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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 parttime) 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
Section ISOC 7
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
Major Findings from Working Group
• Identified the need for a Science Operations Group
within ISOC to support the instrument activities
• Established a preliminary staffing plan/road map for
formulating and staffing the ISOC
• Identified the roles and responsibilities for the three
major components of the ISOC
Section ISOC 8
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
– Perform 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)
Section ISOC 9
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
Section ISOC 10
GLAST Mission - LAT Project
DOE/NASA Review March 31, 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
subsystem 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
Section ISOC 11
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Organization
Instrument
InstrumentScience
ScienceOperations
OperationsCenter
Center
WBS:
4.1.B
WBS: 4.1.B
W.
W.Craig
Craig
D.D.Lung
Lung(Deputy)
(Deputy)
LAT
LAT
Performance
Performance
Assurance
Assurance
LAT Operations Facility
LAT Operations Facility
L. Bator, SLAC
L. Bator, SLAC
Console Operators
transfer from I&T
Science Operations Group
Science Operations Group
TBD
TBD
Mission (Instrument)
Mission (Instrument)
& Ops Planning
& Ops Planning
L. Bator, SLAC
L. Bator, SLAC
SOG Physicist/Engr
SOG Physicist/Engr
A. Borgland*
A. Borgland*
X. Chen*
X. Chen*
Facility Engineering
Facility Engineering
SW - J. Panetta*
SW - J. Panetta*
SW - TBD
SW - TBD
Network – TBD
Network – TBD
Systems – TBD
Systems – TBD
Physicists/Engineers
transfer from I&T
FSW & Test Bed
FSW & Test Bed
J.G. Thayer*
J.G. Thayer*
J.B. Thayer*
J.B. Thayer*
Operations Integrated
Product Team
SU-HEPL, SU-SLAC, GSFC,
NRL, UCSC
Science Analysis Software
Science Analysis Software
R. Dubois
R. Dubois
SAS Physicist/Engr
SAS Physicist/Engr
TBD
TBD
TBD
TBD
SAS Physicist/Engineers
transfer from SAS 4.1.D
* Matrixed to other Subsystems
Section ISOC 12
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Staffing Plan
GLAST Launch
45.0
40.0
35.0
LAT Delivery to SAI
30.0
25.0
20.0
15.0
10.0
5.0
Q
4t
h
Q
3r
d
Q
2n
d
1s
tQ
Q
FY
20
07
4t
h
3r
d
Q
Q
2n
d
1s
tQ
Q
20
06
4t
h
FY
Q
3r
d
Q
2n
d
1s
tQ
Q
20
05
4t
h
FY
FY
20
04
3r
d
Q
0.0
Mgr
LOF
SOG
SAS
Section ISOC 13
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Peer Review (3/2/04) Summary
• Charge for the review
– 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
– Are the design, planning, and formulation of the ISOC
properly defined?
• Review was focused on the operation aspect of ISOC
• 20 Request For Action/Recommendations
– Concern areas are:
• Staffing profile
• ISOC organization
– No significant technical finding or recommendation
Section ISOC 14
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Peer Review RFAs
No.
Section
1
1.1 Overview
2
1.1 Overview
RFA Summary
Need ISOC Management Plan & Approach
Need overall functional block diagram illustrating the functional
capabilities and data flow during various phases
Requestor
R. Schweiss
R. Schweiss
3
4
5
1.1 Overview
1.1 Overview
2.1 Requirements
Risk Analysis
Reschedule ISOC CDR
Level III requirements for the LOF and SOG are not complete
R. Schweiss
M. Rackley/C. Young
M. Rackley
6
7
8
1.1 Overview
3.0 Ops Concept
3.0 Ops Concept
M. Rackley/C. Young
M. Rackley
M. Rackley
9
10
1.1 Overview
2.3 V&V
11
12
13
14
3.0 Ops Concept
4.2 SW
Maintainance
1.1 Overview
4.3 Networking
Staffing plan and profile
Define the ISOC reports for internal use and external use
The ISOC does not yet know what system it is using to process
Observatory HSK data or perform the commanding
Describe lesson learned & approach
ISOC verification does not involve early opportunities to
validate/test using LAT instrument
Verify LAT modes
Understand the number of writes to EEPROM
K. Lehtonen
N. Johnson
15
16
1.1 Overview
2.3 Dev Approach
17
18
19
6.1 Gnd Ops SW
6.1 Gnd Ops SW
6.1 Gnd Ops SW
20
1.1 Overview
ISOC detailed development schedule
Enter a more formal agreement with SLAC management on
required data storage and processing requirements
ISOC organization structure & communications
Define mechanism for ISOC requirements being placed on I&T
and SAS
Define LOF/SOG tools
Specify plans and requirements for automation of Ops software
Specify plans and requirements for Ops SW to be of sufficient
robustness
Specify what other ground system elements will be involved in LAT
operations
M. Rackley
M. Rackley/N. Johnson
M. Davis
C. Young
N. Johnson
N. Johnson
R. Corbert
R. Corbert/M. Rackley
R. Corbert
R. Corbert
Section ISOC 15
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
Major ISOC Release & Review Dates
• ISOC Detail Design Review
August 4 2004
• LOF SW Release 1
March 15, 2005
Support GRT #2
• LOF SW Release 2
Support GRT #5
October 14, 2005
• Mission Operations Review
October 18, 2005
• Operation Readiness Review
December 15, 2006
• Launch
February 2007
Section ISOC 16
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
ISOC Critical Path
Develop
Procurement
Specs
7/30/04 / -96
IOC CDR
8/4/04 / -64
ISOC S/W
Release 2
10/14/05 / -34
Mission
Simulations
Complete
9/15/06 / 0
System Dev
1st set
7/20/05 / -98
CD-4
Review
7/14/05 / 0
ISOC S/W
Release 1
3/15/05 /-203
Ground
Readiness
Test #5
11/15/05 / 0
System
Operation
2nd set
9/29/06 / 0
Ground
Readiness
Test #2
4/1/05 / 0
Operational
Model
Complete
1/20/06 / 0
Launch
2/28/07 / -40
Procedures &
Documentation
2nd set
9/30/05 / 0
LAT Ops
Facility
Validation &
Verification
Complete
6/2/06 / 0
Completion
Dates/Variance to
Baseline
Section ISOC 17
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
Approved
Cost Changes Since Rebaseline
• No significant changes from rebaseline
(k$)
4.1.B Baseline, November 03
Changes:
Stanford Benefits Rate Increase
$326
4.1.B Baseline, February 04
$328
$
2
Section ISOC 18
GLAST Mission - LAT Project
DOE/NASA Review March 31, 2004
Road Map to ISOC Detail Design Review
• Establish agreements between the subsystems and
ISOC for transitioning the necessary tools and
staffing
– Between I&T and ISOC
– Between SAS and ISOC
– Between Electronics and ISOC
• Increase LOF staff
• Address all RFAs/Recommendations from the Peer
Review
Section ISOC 19