1. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 1 GLAST Large Area Telescope: Lowell A. Klaisner Stanford Linear Accelerator Center Klaisner@slac.stanford.edu 650-926-2726 Gamma-ray Large Area Space Telescope LAT Face to Face July 17-18, 2003

2. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 2 Outline for this meeting Report on the JOG meeting and the rebaselining process Get input on how we can be more effective in executing the project Review the Strawman schedule –Identify conflicts –Identify plan to closure (by DOE review 7/31) Initial discussions of how to meet the funding profile Subsystem milestones for the next 3 months Interdependencies –TEM & TEMPS integration with CAL modules –DAQ EGSE for subsystem testing Subsystem reports Business –Combining monthly meetings –Improving communications Capture Action Items

3. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 3 Overview Motivation for reviewing cost and schedule –CNES in France deciding to not fund LAT work –Completion of CDR/CD-3 Design has reached a level of maturity Construction of flight hardware beginning Outcome –LAT program needs an additional $17.2 M –Fabrication Phase needs an additional $11.8 M –Operating and commissioning needs an additional $5.5 M Primary open issue is the time phasing of the available funds –Additional needs for the fabrication phase in FY04 = $7.6 M –Additional funding for the fabrication phase in FY04 NASA $3.0 million DOE $0.0 million

4. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 4 Additional Costs to GLAST Mission All values in millions of dollars

5. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 5 Costs that are not fabrication costs Note: These reductions represent an equivalent increase commission/operating costs

6. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 6 Definition of CD-4

7. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 7 Definition of the IOC

8. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 8 Net Change to the Fabrication Phase

9. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 9 Funding Guidance

10. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 10 Total Fabrication Phase Cost and Funding Note: with the $4.6M shortfall in FY04 the available contingency is $2.5M or 8%

11. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 11 Stanford University Loan Stanford University is willing to loan the project $700K to bridge from FY 04 into FY 03 –The need for additional funds in FY 03 has decreased The mission office at Goddard has helped with ’03 The proposed change to IOC funding reduces FY 03 fabrication phase costs by $200K This loan would only make the FY 04 cash flow problem worse The project proposes to not exercise this loan in FY 03 –It may be possible to negotiate as similar loan for ~$1 million to bridge from FY 05 into FY 04

12. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 12 Descope Options to Preserve Schedule  Previously moved beam test from before I&T to Comm. Phase o Tier 1  Reprogram I&T prep and assembly of first towers  Reprogram calibration modules for beam testing to be last modules fabricated – add 2 weeks float  Move environmental testing to Spectrum Astro o Tier 2  Build 16 modules, Fly 14 (Baseline -- Build 18 modules, Fly 16)  Science impact: degradation of A eff and FOV o Tier 3  Build 14 modules, Fly 12  Science impact: Significant degradation of A eff and FOV (below level-1 requirements) LAT and Mission designs are highly optimized. All identified descopes that are effective are also painful. Most options address potential schedule slips.

13. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 13 Summary Project is starting fabrication of flight hardware –Completed the CD-3/CDR The instrument design is mature A review of cost and schedule indicates that the project needs $17.2M increase in funding to have adequate cost contingency Also the project needs an additional 3 months of schedule to have adequate schedule contingency Define CD-4 as the successful completion of the pre-test review –The Fabrication Phase needs a $11.7M increase –CD-4 date is unchanged Some reorganization of the LAT to better address this next phase Increased participation by the NASA, DOE and Laboratory management to assure resources are available The open issue is the time phasing of the funding –Funding needs to be moved from FY05 to FY04 OR –The work needs to be reprogrammed to move activities from FY04 to FY05 With a $1 M loan from SU, $3.6 M of work needs to move DOE Rebaseline review on July 31, 2003

14. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 14 Feedback Get input on how we can be more effective in executing the project

15. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 15 LAT Working Schedule LAT RFI 12/1/05 Environmental Testing 15 wk System Test 16 wk 4 wk FLOAT Install Tower A 8 wk Install Towers 13/14 2 wk Install Global items 6wk Install Towers B,1-12 13 wk LAT ASSEMBLY Available: TKR A/B 4/15 /04 CAL A/B 5/20/04 Available: TKR 13/14 10/28/04 CAL 13/14 10/21/04 Available: ACD 9/21/04 Elex 9/10/04 X-LAT 8/2/04 Critical Path 8 wk FLOAT 12 wk FLOAT Ship LAT 1 wk Prep GRID 3 wk Available: GRID 4/29 /04 12/23/0411/11/0410/28/045/20/0411/3/057/21/054/21/05 Complete CAL 1-14 22 wk 7/1/04 4 wk float 714/05 CD-4 CommissionFabrication

16. GLAST LAT ProjectLAT Face to Face, July 17-18, 2003 16 Remainder of the meeting Initial discussions of how to meet the funding profile Subsystem milestones for the next 3 months Interdependencies –TEM & TEMPS integration with CAL modules –DAQ EGSE for subsystem testing Subsystem reports Business –Combining monthly meetings –Improving communications Capture Action Items