1. Large Area Telescope Project
Gamma-ray Large Area Space Telescope
GLAST Mission
Large Area Telescope Project
Lowell A. Klaisner, Project Manager
Stanford Linear Accelerator Center
Project Status March 31, 2004

2. Introduction
The transition to the first flight units has had the expected challenges and impacts
The LAT team is effectively stepping up to solve problems
Producing flight hardware
First tower integrated with the grid this fiscal year
Tight, success-oriented schedule
We will see risk to the instrument delivery date until we have established a production rate history
Plan has 9 weeks float to delivery for observatory integration
Overall project contingency is OK
Project is 65% complete
Contingency is 29% of cost to go
Funding in the current fiscal year is an issue
All funding for FY04 is allocated

3. GLAST MISSION SUMMARY
Objective: Larger field of view (FOV), higher sensitivity, and broader energy detection range than any previously flown gamma-ray mission.
Mission Duration: 5 yrs (10 yr Goal)
Orbit: km Circular, 28.5° Inclination
Launch Date: February 2007
Launch Vehicle: Delta 2920H-10
Launch Site: Kennedy Space Center

4. GLAST Observatory LAT GBM NaI Sensors LAT Radiators Solar Array
GBM BGO Sensors +Z
Spacecraft +Y +X

5. Instrument Structure Anti Coincidence Detector 16 Tracker Modules Grid
16 Calorimeter Modules
Electronics Modules
Radiators
Mass 3000 Kg
Power 650 Watts

6. LAT Organization Chart
Collaboration Science Team
Principal Investigator
P. Michelson
Instrument Scientist
S. Ritz
EPO
L. Cominsky
Senior Science Advisory Committee
N. Gehrels
Project Manager
L. Klaisner
D. Horn
J. Martin
D. Nicholson, Admin
Instrument Science Performance
S. Ritz
Instrument Advisory Committee
S. Kahn
Deputy for Systems
D. Horn
Project Controls
T. Boysen
Design Integration &
Analysis
M. Nordby
Mission Assurance
D. Marsh
Electrical Integration
G. Haller
Manufacturing Eng.
J. Clinton
System Engineering
P. Hascall
Integration &Test
E. Bloom
TKR
R. Johnson
CAL
N. Johnson
ACD
D. Thompson
Mechanical
M. Campell
DAQ & FSW
G. Haller
ISOC
W. Craig (acting)
D. Lung, Deputy
SAS
R. Dubois

7. Partner Contributions to LAT
Calorimeter
Tracker
ACD
Grid
Tracker (TKR)
- Italy (ASI/INFN): provide Si-strip detectors & assemble & test TKR modules
- Japan: provide Si-strip detectors & oversee detector production
- SU-SLAC & UCSC (USA): provide Si-strip detectors, front-end electronics, cable plant, components
Calorimeter (CAL)
- IN2P3 (France): mechanical structure
- Sweden: CsI xtals & acceptance testing
- NRL (USA): Fabricate, assemble and test CAL modules
Anticoincidence Detector (ACD)
- GSFC (USA) Fabricate, assemble and test the ACD including micrometeoriod shield / thermal blanket
Data Acquisition System (DAQ)
- SU-SLAC & NRL (USA): Data acquisition hardware & flight software
Mechanical/Thermal System
- SU-SLAC (USA): provide LAT Grid, thermal radiators, heat pipes & ancillaries
LAT Integration & Test
- SU-SLAC (USA): assembly & test of LAT
- NRL (USA): instrument-level environmental tests
All partners contributing to science analysis preparations: software, science simulations

8. International agreements
MoAs between Stanford Univ-SLAC and:
INFN, ASI, Italy pending signature
IN2P3, France; NRL  revised & signed
CEA/DSM/DAPNIA, France; NRL  revised & signed
Royal Inst. of Technology & Stockholm Univ., Sweden; NRL  signed
Hiroshima Univ., ISAS & RIKEN, Japan; UCSC/SCIPP  signed
NASA – Department Of Energy  signed
Agency level agreements
NASA – CNRS/IN2P3 Agreement pending; draft exchanged
NASA – CEA Agreement  signed
NASA – ASI Agreement pending; draft exchanged
NASA – Japan draft sent to JAXA
NASA – Sweden draft in process

9. Budget, Cost, Funding, Performance

10. Cost and Schedule Variance
1 month
MAR03
APR03
MAY03
JUN03
JUL03
AUG03
SEP03
OCT03
NOV03
DEC03
JAN04
FEB04
BCWS
49,452
52,780
55,210
57,854
60,114
62,777
66,081
69,052
69,801
73,433
77,394
81,916
BCWP
46,114
49,627
51,835
54,564
56,229
58,348
60,548
62,648
69,724
73,353
76,574
80,742
ACWP
45,435
48,344
51,125
54,402
57,264
59,429
61,990
63,894
67,721
71,081
74,989
78,460 CV
679
1,283
710
162
-1,035
-1,081
-1,443
-1,246
2,003
2,271
1,585
2,281 SV
-3,338
-3,152
-3,375
-3,290
-3,885
-4,428
-5,533
-6,404
-76
-80
-820
-1,175

11. Contingency Analysis (K$)

12. GLAST Mission Office Support in FY04
The GLAST mission management and the LAT project management identified areas were additional manpower would help assure that the project meet its goals. The mission office added funds to the project for this additional staff.
Integration and Test Staff $ 523K
Tracker Staff $ 738K
Performance and Safety Assurance $ 973K
Flight Software Staff $ 747K Total $2,981K
In addition, the mission office added funds to support the costs associated with the following CCB actions:
ACD Mechanical Materials and Support $ 195K
ACD Photomultiplier Anomaly Resolution $ 299K
ACD Base Electronics Assembly $ 222K
ISIS Scope Change $ K
Total $ 810K
Total funds added $3,791K
Also, the Mission Office has provided technical support
Thermal Engineering
EMI/EMC Engineering
Tracker and ACD Management
Mechanical Analysis

13. History of the Budget at Complete Since Rebaseline

14. BAC projections to end of project
Contingency available $12,447K
29% of cost to go
Allocation of project contingency since rebaselining
Between the end of July 03 and the end of February 04
Earned value $24,513K
Allocation of cont. $ 4,879K
Percentage %
Rate of Allocation over the last 7 months
$697K per month
Projection at this rate for the remaining 16 months $11,152K
Cost risk will decline as project matures
Rebaseline

15. FY04 Cash Flow Planned costs March through September $29,108K
* Mission office moved $500K of LAT funding from FY 05 to FY04
Planned costs March through September $29,108K
Project additional funds needed on FY04
At $697K per month $ 4,182K
At 20 % of costs (recent experience) $ 5,821K
At 29% of costs (rate for the remainder) $ 8,441K
Mitigation
Move activities into FY05
$5,000 Bridge available from Stanford University
Mission office move NASA funding forward, if available

16. Potential Liens

17. LAT Schedule

18. Completion Dates (baseline variance)
LAT Critical Path
Tracker Bottom Tray Parts 4/9/04 (0)
Assemble Tracker Towers A-12
11/26/04 (0)
Integrate Tkr/Cal Towers 12-14
2/3/05 (0)
Integrate LAT-Wide Electronics 2/25/05 (0)
Integrate ACD
3/15/05 (0)
Integrate Cross-LAT Plate
3/18/05 (0)
System Test
6/6/05 (0)
Ready for CD-4 and Pre-Environmental Test Review
6/7/05 (0)
Completion Dates (baseline variance)

19. Threats to Schedule Path to Integration and Test of Tower A
Completing detailed documentation
Getting fabrication contracts in place
Anomaly in qualification testing
Path to Integration and Test of the complete instrument
Achieving planned production rates
Execution of I&T plans
Rapid response to anomalies
Path to Environmental Test (CD-4)
Anomalies requiring de-integration
Rapid analysis of and response to anomalies

20. Level 1 and Level 2 Milestones

21. Technical Status

22. Closed Issues CDR/CD-3 Loss of CNES funding
Successfully transferred work to the US
Funded at the rebaseline
ASICs
All flight ASICs are delivered
No unresolved problems
CAL-GRID joint
Added “Menning Plates”
Issue closed
Cross LAT plate thermal connection
Chose direct connection between DAQ boxes and plate
Rebaseline Review
Tracker bottom tray design
Design complete and parts in fabrication

23. Subsystem Status 1 Data Acquisition (SLAC)
Out for bid for the flight Tower Electronics Modules
Designs of all cards exist and prototypes in test
Flight Software peer review 2/26/04, monthly software demonstrations
Tracker (UCSC, SLAC, INFN)
Production planning readiness workshop held in Italy
Thermal-Vacuum test of the engineering model complete
Flight production underway
Silicon ladders (30% complete), Multi Chip Modules, mid-trays, and bottom tray components
Need to complete the flight documentation and testing
Mechanical (SLAC)
Flight GRID being machined
Thermal (SLAC)
Flight heat pipes in fabrication (Lockheed Martin)

24. Subsystem Status 2 Calorimeter (NRL, IN2P3)
Flight production well underway
80% of CsI crystals in hand
25% of CDEs have been manufactured
Flight ASICs (~12,000) have been tested
All machined parts and 3 flight structures are complete
Anti-Coincidence Detector (GSFC)
Flight scintillator detectors, phototube and electronic assemblies and the structure are in production
Integration and Test (SLAC)
Facilities are ready to begin flight integration in August
Plan in place for support equipment and procurement started
I&T Kickoff held in March
Instrument Science Operating Center (SLAC, SU, KIPEC, Collaboration)
Planning underway
Manager in place by end of Summer (Bill Craig, Acting)
Science Analysis Software (SLAC, Collaboration)
Initial suite of software tools in place
Highly successful Data Challenge 1

25. Summary No major outstanding technical issues
Analysis and testing continues
Producing flight hardware
One tower integrated in the grid this fiscal year
Tight, success-oriented schedule
Overall project contingency is OK
Project is 65% complete
Contingency is 29% of cost to go
Funding in the current fiscal year is an issue
All funding for FY04 is allocated
Continued strong support from NASA, DOE, and the Collaboration
A strong, talented and committed staff

26. Backup Slides

27. Cost Performance Report

28. Contingency Analysis

29. History of Cost Estimate

30. Planned Staffing