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GLAST Large Area Telescope: Face to Face Meeting November 17, 2004

This document provides a cost plan and variance summary, lien list, manpower plan, and cost/manpower overview for the GLAST Large Area Telescope Anti-Coincidence Detector (ACD) subsystem. It also includes a schedule, backup material, critical path, descope options, and assumptions and risks.

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GLAST Large Area Telescope: Face to Face Meeting November 17, 2004

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  1. Gamma-ray Large Area Space Telescope GLAST Large Area Telescope: Face to Face Meeting November 17, 2004 AntiCoincidence Detector (ACD) Subsystem WBS: 4.1.6 David J. Thompson Thomas E. Johnson NASA Goddard Space Flight Center Subsystem Manager/Instrument Manager David.J.Thompson@nasa.gov Thomas.E.Johnson@nasa.gov

  2. Outline • Cost Plan – Variance Summary • Lien List • Manpower Plan • FY05 Cost/Manpower Overview • FY06 & 07 Cost/Manpower Overview • Schedule • Backup Material • Critical Path • Descope Options • Assumptions and Risks

  3. COST PLAN – VARIANCE SUMMARY

  4. Lien List • * Updated Lien list from the lien list provided by Jay Doubrava on 10/13/04

  5. Manpower Plan • The following table provides both the Contractor and Civil Servant manpower plan for FY05-FY07 • Assumptions: • ACD RFI and integration to the LAT date is 5/17/04. • ACD Support Team ramps down significantly after 5/17/04. • From July – September, 1.8 FTE’s are for Science Support and the remaining support is for Systems Engineering and Management.

  6. FY05 Cost/Manpower Overview by Task

  7. FY06 & 07 Cost/Manpower Overview by Task • Assumptions: • Civil Service personnel salaries are paid by Goddard, not the LAT. • Labor consists of science support only.

  8. Schedule Flow 10/4 – 11/30 11/25 – 12/7 12/2 – 1/11 Qual Electronics Chassis Environmental Test 1st flight chassis Environmental Acceptance Test The remaining Seven Flight Chassis Environmental Acceptance tests 12/29/04 – 1/14/05 6/10 – 11/19 12/14 – 1/13 12/7 – 12/13 Assemble last 2 rows of TDAs & WSF (124-130, 224-230, 324-330, 424-430) onto TSA Initial TDA/TSA I&T in B7 Install & test 1st & 2nd flight Chassis onto ACD Install & test remaining six flight Chassis onto ACD 1/27/05 – 2/10/05 2/23/05 – 3/4/05 2/11/05 – 2/23/05 2/10/05 1/25/05 – 1/27/05 1/14/05 – 1/25/05 1/14/05 ACD Subsystem Efficiency Verification test (include rotate ACD 90 degree) Vibration Test EMI/EMC Test Pre- Environmental Review (PER) Install Thermal Blanket & MMS ACD Full Functional Test ACD Integration complete 4/12/05-4/19/05 (was 3/26/05 – 4/2/05) 3/4/05 –3/10/05 3/10/05 – 4/7/05 4/7/05 – 4/8/05 4/11/05 4/19/05 – 5/17/05 Mass Properties Pre-ship Review (PSR) Acoustic Test Thermal Balance/ Thermal-Vac Test Post-ship Checkout & Full Functional Test at SLAC ACD ship to SLAC

  9. BACKUP SLIDES

  10. ACD Critical Path - PMTs

  11. Descope Options • Perform environmental testing at the LAT Level. • The ACD Subsystem would not be fully qualified prior to integration to the LAT. This would transfer schedule and cost risk to LAT integration. • The following table provides the cost and schedule savings for eliminating testing at the ACD Subsystem level.

  12. COST PLAN – Assumptions and Risks • Assumptions • Success based plan. Rapid resolution of current technical issues (PMTs and EGSE) is required to stay on plan. • ACD RFI date is 5/17/04. • Minimal support (details provided on slides 3,4,6,&7) is provided following integration of the ACD to the LAT. • Risks • No contingency in ACD cost plan. • A later than 5/17/04 integration date to the LAT will not allow the full planned ramp down of ACD personnel.

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