1. GLAST LAT Project DOE/NASA Review, March 31, 2004 1 GLAST Large Area Telescope: Lowell A. Klaisner Stanford Linear Accelerator Center Project Manager Klaisner@slac.stanford.edu 650-926-2726 Gamma-ray Large Area Space Telescope Summary April 1, 2004

2. GLAST LAT Project DOE/NASA Review, March 31, 2004 2 MCM Burn-In & Test Apr 29, 2004 Tower Assembly & Test Jul 7, 2004 Tower A RFI Aug 18, 2004 Working Critical Path, 3/31/04 Tower 14 RFI Feb 15, 2005 LAT Assembly Complete Apr 8, 2005 System Test Complete Jun 28, 2005 Environmental Test Complete November 12 2005 LAT RFI November 12, 2005 Pre-ship/CD-4 Review June 29, 2005 This critical path based on Tracker estimates presented March 31, 2004. The schedule after Tower A will be worked to mitigate the resulting delay in LAT RFI.

3. GLAST LAT Project DOE/NASA Review, March 31, 2004 3 Mitigating late module arrival The project is focusing on integration and test of the first tower. The following are areas to work as we learn more about actual performance –I&T can use the additional time for more training and testing to reduce risk in integration and improve productivity. –Some part of System Test could be moved earlier and tested with a partial LAT configuration –System Test Period is 2 Shift/5 Days, could be up to 3 Shift/7 Days –Increase the production rate of modules by working second shifts, etc. –Investigate compressing the environmental test schedule from the present 15 weeks

4. GLAST LAT Project DOE/NASA Review, March 31, 2004 4 Summary The LAT is a challenging instrument Significant technical progress -- no major issues outstanding Producing flight hardware Overall project funding is adequate if stay on schedule Funding in the current fiscal year is an issue being worked Schedule is challenging –Focusing on installation of the first flight tower in the grid –Mitigating delays as they occur Delay in completing Grid design – Qualify 2 nd grid Delay in arrival of CAL ASICs -- Load parts before qualification Tracker delay due to test anomalies – Proceed with fabrication before testing is complete Project management needs to be proactive in identifying plans to mitigate potential future schedule delays A strong, talented staff that is committed to delivering this instrument and doing the science

5. GLAST LAT Project DOE/NASA Review, March 31, 2004 5 GLAST Feb 2007 launch