GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 1 GLAST Large Area Telescope: I & T Input to LAT Planning Meeting July 17 th and 18 th Elliott Bloom SU-SLAC Subsystem Manager Brian Grist SU-SLAC Subsystem Engineer Gamma-ray Large Area Space Telescope

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 2 Key Milestone List to Delivery (Not Necessarily in Current PMCS) EM Plan, Procedures, EGSE and MGSE Complete07/31/03 Receive CAL EM08/08/03 Receive TKR mini-tower08/22/03 EM Tower functional tests Complete09/18/03 EM Tower Available for use by Flight Software09/18/03 EM Calibration Complete10/12/03 EM mechanical fit check using 1X4 Grid, TKR Mech tower, CAL10/13/03 CAL EM at NRL Loading Doc; TKR mini-tower in Italian Customs 10/17/03 Support GSI Beam Test(CAL and TKR mini-tower)11/14/03 All I&T Flight Techs on Staff (Mechanical and Electrical)12/15/03 Flight Integration Training MGSE Ready01/15/04 All Flight Integration Procedures Complete02/15/04 All Flight Integration MGSE Complete with SDP03/01/04 LAT Assembly Configuration EGSE Ready For Use03/01/04 Integration Readiness Review03/15/04 TKR A/B Available RFI04/15/04 Grid Available RFI05/20/04 CAL A/B Available RFI05/20/04

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 3 T&DF System (LAT)EGSE AEM CPU LCB EGSE Crate WAN Central Database GASU CAL, TKR or Sensor Simulator ACD or Sensor Simulator Online Workstation TEMs SLAC GEM EBM Firewall 28 V Supply VME Multi-Tower EGSE (9/15/03)

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 4 AEM/TEM Single Tower EGSE Configuration (GSI test) VME Chassis LAT-COMM External Trigger Electronics/Online Subsystem/simulator Subsystem (or simulator) Ethernet Router and Firewall Ethernet Main Dataflow Ethernet Back door debug RS-232 WAN Online Workstation Test Exec Configuration Commanding Telemetry Event Processing Monitoring Visualization Data base Message logger Alerts Electronic log CPU Commanding Telemetry Monitoring Hardware Drivers Central Database DC Power External Hardware

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 5 Key Milestone List to Delivery After Start of Flight I&T (Not in Current PMCS) Start Tower A/B Installation/Test05/20/04 Start Tower 1/2 Installation/Test07/01/04 Start Tower 13/14 Installation/Test10/28/04 Finish Tower Installation/Test11/11/04 Finish Installation of ACD/ELEX/X-LAT12/23/04 Flight Configuration Ready for System Test12/23/04 Complete System Test04/21/05 LAT Shipped for Environmental Testing07/21/05 Environmental Testing Complete11/03/05 LAT RFI12/01/05

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 6 LATEGSE LAT Assembly Configuration (3/1/04) AEM CPU 1553 LCB SIU LCB EGSE Crate CPU LCB 3 EPUs WAN Central Database GASU Test Point on LAT EMI Skirt CAL, TKR or Sensor Simulator ACD or Sensor Simulator Online Workstation TEMs SLAC GEM CPU EBM Firewall SSR Spacecraft simulator 1553 Discretes 28 V Supply

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 7 LATEGSE Complete Flight Unit Configuration & CU (12/24/04) AEM CPU 1553 LCB SIU LCB EGSE Crate CPU LCB 3 EPUs WAN Central Database GASU Test Point on LAT EMI Skirt CAL, TKR ACD Online Workstation TEMs SLAC GEM CPU EBM Firewall SSR 1553 Discretes Spacecraft simulator 28 V Supply

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 8 Interdependencies Dependent on deliveries from all subsystems to be able to do the core of our work. –EM CAL & TKR mini-tower deliveries. –EM GASU and flight software support from ELX. –All Flight Hardware and Software. –MGSE FEM Analysis Budget for I&T Flight Electronic Techs and the hiring of those techs (4 full time people starting 12/15/03) is currently the responsibility of ELX. I&T will schedule the work for these Techs. System engineering test plans are required as input to I&T test plans and resulting procedures. Mission level EGSE decisions can impact I&T EGSE schedule and budget.

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 9 Flight Hardware Procurements No flight hardware procured by I&T. All flight components come from a subsystem.

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 10 Flight Hardware Manufacturing Plan Status LAT-MD LAT Integration & Test PlanIn Work LAT-MD LAT EM Test PlanIn signoff LAT-MD EGSE PlanIn revision LAT-MD SVAC PlanReleased LAT-MD SVAC Test PlanReleased LAT-MD LAT Weight and CG Test PlanReleased LAT-MD MGSE Development PlanIn signoff LAT-MD LAT Dynamics Test Performance Plan Draft in Cyberdocs LAT-MD LAT Thermal Test Performance Plan Draft in Cyberdocs LAT-MD LAT EMI Test Performance Plan Draft in Cyberdocs LAT-MD LAT Assembly SequenceIn revision LAT-MD LAT Facilities PlanReleased LAT-MD LAT Survey & Alignment Performance PlanIn signoff LAT-MD LAT Electrical Test Performance planReleased LAT-MD LAT Particle Test PlanIn signoff

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 11 Engineering Model Testing Closure Status I&T Tests of the TKR mini-tower were done and the results reported to the Engineering meeting at June 10 Engineering Meeting. Data is still being worked. EM tower (CAL EM and TKR mini-tower) due in August to I&T Complete EM Tower functional test by September 18 th and then make available to Flight Software. Complete EM Calibration by October 12 th. Need 1x4 Grid and TRK EM Mechanical tower a week before Mechanical fit check to assemble TRK EM into grid. Perform a mechanical fit check using 1x4 Grid, TKR Mechanical Tower, and EM CAL on October 13 th. CAL EM on the NRL loading dock and the TKR mini-tower in Italian Customs by October 17 th. Support the GSI Beam Test, including the CAL and the TKR mini-tower (run Carbon in the daytime) November 14 th – 24 th.

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 12 Open Flight Design Issues/ Status Trades CAL-Grid interface design, impacts I&T MGSE, assembly, processes, and procedures. Design not completed. Grid EMI Skirt design impacts I&T assembly, processes and procedures. Design not completed. X-LAT plate design impacts I&T MGSE, assembly, processes and procedures. Design not completed. Radiator interface and MGSE design impact I&T, assembly, processes and procedures. Design not completed. Environmental test sensor requirements impact I&T assembly, processes and procedures. Requirements have not been finalized. LAT pointing knowledge requirements are under review by the project. I&T test plans cannot be finalized until we know the final requirements.

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 13 Cost/Schedule Status (May Month End) -2% variance -5% variance The monthly Cost and Schedule Variances are trending negative Cost Variance – GREEN Schedule Variance – YELLOW Beam test change request has been approved and has been incorporated for the June Report.

GLAST LAT ProjectLAT Planning Meeting July 17 th and 18 th Integration and Test 14 Issues/Concerns/Suggestions/Risks Late delivery to I&T of EM parts and EGSE software test scripts.  Late delivery has delayed preparations for LAT, particularly in areas of IFCT and SVAC. Possible impact on EGSE.  Part of EGSE/MGSE verification strategy depends on I&T EM program. Finalization of all LAT test plan requirements is not complete post CDR. This is resulting in compressed schedule and potential increased cost for I&T. Current estimates are September for completing all test plans from the Design Team. Delivery of flight hardware to I&T may be late. I&T EGSE is proceeding with in-house developed test executive software. Change to another system for Observatory and/or IOC will require major cost change request. Spacecraft interface detail uncertainty.  Environmental test fixtures.  EGSE interface.  MGSE handling fixtures. SIIS fidelity uncertainty. Delivery of flight hardware to I&T may be late. When will a decision be made about where to go for Environmental Testing? This will impact preparations and design of Vib and T/V fixtures.