GLAST Large Area Telescope: Cost/Schedule Review September 1, 2005

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Presentation transcript:

GLAST Large Area Telescope: Cost/Schedule Review September 1, 2005 Gamma-ray Large Area Space Telescope GLAST Large Area Telescope: Cost/Schedule Review September 1, 2005 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

SIGNIFICANT ACCOMPLISHMENTS Completed Thermal Vacuum testing Lowering the ACD over the Tracker thermal simulator (required to drive the temperature of the ACD) Installed in Facility 225

SIGNIFICANT ACCOMPLISHMENTS Successfully completed Mass Property testing Mass and Center of Gravity within allocation Installed on the Mass Property Measurement Facility

SIGNIFICANT ACCOMPLISHMENTS ACD Team Photo - August 9, 2005

ACD Delivery to LAT

Near Term Milestones Vibration Acoustics Mass Properties PSR Shipping Milestone Description Date New Date Status/Notes ACD PER 5/24/05 6/8/05 (Act) COMPLETE Efficiency Verification Test 6/3/05 6/16/05 7/8/05 Thermal Vacuum 6/15/05 6/27/05 7/19-28/05 7/19-8/1 MMS/TB Installation 6/17/05 6/29/05 Vibration 6/23/05 7/11-14/05 Acoustics 7/15-18/05 7/18/05 Mass Properties 8/2-3 8/7 PSR 8/8 Shipping 8/9-12 8/10-13

ACD - Schedule Flow (as of 6/22) 10/4 – 2/5/05 2/7 - 2/15 Qual Electronics Chassis Environmental Test 1st flight chassis Environmental Acceptance Test (8d) The remaining Seven Flight Chassis Environmental Acceptance tests (25d) Delay due to EGSE Issues 5/1 – 6/7 6/10/04 – 1/28/05 2/15 – 2/22 2/28 – 5/10 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 flight Chassis onto ACD Install & test remaining flight Chassis onto ACD 6/29 – 7/8 6/8 7/11 – 7/14 7/9 6/22 – 6/27 6/7 ACD Subsystem Efficiency Verification test (include rotate ACD 90 degree)(10d) 6/28 > 6/27 actual Vibration Test (4d) Install Thermal Blanket (1d) ACD Integration complete MMS Install (1d) ACD Full Functional Test(5d) Pre- Environmental Review (PER) Was 7/19 – 7/28 Now 7/19 – 8/1 Was 8/1 – 8/2 Now 8/8 Was 8/3 -8/8 Now 8/9 – 8/12 Was 8/8 – 8/12 Now 8/13 – 8/17 7/15 – 7/18 Was 7/29 – 7/30 Now 8/2 – 8/3 Was 8/12 Now 8/17 Acoustic Test (3d) Thermal-Vac Test (10cd) Mass Properties (2d) Pre-ship Review (PSR) ACD ship to SLAC (5d) Post ship Check out (5d) ACD RFI

ACD Problem /Failure Report Status 4 PR’s open 3 open and provided to LAT for tracking at the LAT level 1 ready for closure (thermistor anomaly) 2 PFR’s are open Inside thermistor wire stay clear - Green, ready to close Inside base frame stay clear – CR prepared. Outside stay-clear violation CR in the works

Level 3 Milestone List

Milestone Variance Explanation All milestones completed as of 8/23/2005

Cost Report

Cost Variance Explanation Why overrun/underrun? Lag in accruals and invoicing. What will be done to correct? CR for $361K approved in August. Should be sufficient to close out work on ACD. Closing out all tasks and contracts. Only remaining cost risks are the chargebacks (i.e. for testing and fabrication support).

FTE Report (DOE/NASA-funded only)

FTE Variance Explanation Why overrun/underrun? Additional work. Closing out paperwork and issues. Schedule delay. What is the impact? Cost. What will be done to correct? Delivered ACD! Moving people off of project.