Project Status March 31, 2004

1. Gamma-ray Large Area Space Telescope Project StatusMarch 31, 2004 GLAST Mission Large Area Telescope Project Lowell A. Klaisner, Project Manager Stanford Linear Accelerator Center klaisner@slac.stanford.edu

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: 565 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.  Tracker Grid ACD e– e+ Calorimeter Partner Contributions to LAT • 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 1month

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 $ 94K 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 20% • 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 • 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 * Mission office moved $500K of LAT funding from FY 05 to FY04

16. Potential Liens

17. LAT Schedule

18. LAT Critical Path Tracker Bottom Tray Parts4/9/04 (0) Assemble Tracker Towers A-12 11/26/04 (0) Integrate Tkr/Cal Towers 12-14 2/3/05 (0) Integrate LAT-Wide Electronics2/25/05 (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 • Issue closed • 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