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LAT Face to Face July 17-18, 2003

Gamma-ray Large Area Space Telescope. LAT Face to Face July 17-18, 2003. GLAST Large Area Telescope: Lowell A. Klaisner Stanford Linear Accelerator Center Klaisner@slac.stanford.edu 650-926-2726. Outline for this meeting. Report on the JOG meeting and the rebaselining process

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LAT Face to Face July 17-18, 2003

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

  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. 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. Additional Costs to GLAST Mission All values in millions of dollars

  5. Costs that are not fabrication costs Note: These reductions represent an equivalent increase commission/operating costs

  6. Definition of CD-4

  7. Definition of the IOC

  8. Net Change to the Fabrication Phase

  9. Funding Guidance

  10. Total Fabrication Phase Cost and Funding Note: with the $4.6M shortfall in FY04 the available contingency is $2.5M or 8%

  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. Descope Options to Preserve Schedule LAT and Mission designs are highly optimized. All identified descopes that are effective are also painful. Most options address potential schedule slips. • Previously moved beam test from before I&T to Comm. Phase • 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 • Tier 2 • Build 16 modules, Fly 14 (Baseline -- Build 18 modules, Fly 16) • Science impact: degradation of Aeff and FOV • Tier 3 • Build 14 modules, Fly 12 • Science impact: Significant degradation of Aeff and FOV (below level-1 requirements)

  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. Feedback • Get input on how we can be more effective in executing the project

  15. 10/28/04 11/11/04 12/23/04 7/21/05 11/3/05 5/20/04 4/21/05 714/05 7/1/04 LAT Working Schedule Available: GRID 4/29 /04 Available: TKR A/B 4/15 /04 CAL A/B 5/20/04 Complete CAL 1-14 22 wk 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 8 wk FLOAT Prep GRID 3 wk Install Tower A 8 wk Install Towers B,1-12 13 wk Install Towers 13/14 2 wk Install Global items 6wk Critical Path 4 wk float LAT ASSEMBLY System Test 16 wk Environmental Testing 15 wk 12 wk FLOAT Ship LAT 1 wk 4 wk FLOAT LAT RFI 12/1/05 Fabrication CD-4 Commission

  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

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