GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 1

GLAST Large Area Telescope: GLAST Large Area Telescope: I & T Input to LAT Planning Meeting

July 17th and 18th

Elliott BloomSU-SLAC

Subsystem Manager

Brian GristSU-SLAC

Subsystem Engineer

elliott@slac.stanford.edu, bgrist@slac.stanford.edu650-926-2469 650-926-2998

Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 2

Key Milestone List to Delivery Key Milestone List to Delivery (Not Necessarily in Current PMCS)(Not Necessarily in Current PMCS)

EM Plan, Procedures, EGSE and MGSE Complete 07/31/03

Receive CAL EM 08/08/03

Receive TKR mini-tower 08/22/03

EM Tower functional tests Complete 09/18/03

EM Tower Available for use by Flight Software 09/18/03

EM Calibration Complete 10/12/03

EM mechanical fit check using 1X4 Grid, TKR Mech tower, CAL 10/13/03

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 Ready 01/15/04

All Flight Integration Procedures Complete 02/15/04

All Flight Integration MGSE Complete with SDP 03/01/04

LAT Assembly Configuration EGSE Ready For Use 03/01/04

Integration Readiness Review 03/15/04

TKR A/B Available RFI 04/15/04

Grid Available RFI 05/20/04

CAL A/B Available RFI 05/20/04

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 3

T&DF System (LAT) EGSE

AEM

CPU

LCB

EGSE Crate

WA

N

CentralDatabase

GASU

CAL, TKR or

SensorSimulator

CAL, TKR or

SensorSimulator

ACDor

SensorSimulator

Online WorkstationTEMsTEMs

SLAC

GEM

EBM

Fire

wa

ll

28 V Supply

VME

Multi-Tower EGSE (9/15/03)Multi-Tower EGSE (9/15/03)

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 4

AEM/TEM

Single Tower EGSE Configuration (GSI test)Single Tower EGSE Configuration (GSI test)

VME Chassis

LAT-COMM

•External Trigger

Electronics/OnlineSubsystem/simulator

Subsystem (or simulator)

Ethernet Routerand Firewall

Ethernet

Main Dataflow Ethernet

Back door debug RS-232

WA

N

Online Workstation• Test Exec• Configuration• Commanding• Telemetry• Event Processing• Monitoring• Visualization• Data base• Message logger• Alerts• Electronic log

CPU

• Commanding

• Telemetry

• Monitoring

• Hardware Drivers

CentralDatabase

DC Power

External Hardware

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 5

Key Milestone List to Delivery After Start of Flight I&T Key Milestone List to Delivery After Start of Flight I&T (Not in Current PMCS)(Not in Current PMCS)

Start Tower A/B Installation/Test 05/20/04

Start Tower 1/2 Installation/Test 07/01/04

Start Tower 13/14 Installation/Test 10/28/04

Finish Tower Installation/Test 11/11/04

Finish Installation of ACD/ELEX/X-LAT 12/23/04

Flight Configuration Ready for System Test 12/23/04

Complete System Test 04/21/05

LAT Shipped for Environmental Testing 07/21/05

Environmental Testing Complete 11/03/05

LAT RFI 12/01/05

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 6

LAT EGSE

LAT Assembly Configuration (3/1/04)LAT Assembly Configuration (3/1/04)

AEM

CPU

1553

LCB

SIU

LCB

EGSE Crate

CPU

LCB

3 EPUs

WA

N

CentralDatabase

GASU

Test Point on LAT EMI Skirt CAL, TKR

orSensor

Simulator

CAL, TKR or

SensorSimulator

ACDor

SensorSimulator

Online WorkstationTEMsTEMs

SLAC

GEM

CPU

EBM

Fire

wa

ll

SSR

Spacecraft simulator

1553

Discretes

28 V Supply

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 7

LAT EGSE

Complete Flight Unit Configuration & CU (12/24/04)Complete Flight Unit Configuration & CU (12/24/04)

AEM

CPU

1553

LCB

SIU

LCB

EGSE Crate

CPU

LCB

3 EPUs

WA

N

CentralDatabase

GASU

Test Point on LAT EMI Skirt

CAL, TKRCAL, TKR

ACD

Online WorkstationTEMsTEMs

SLAC

GEM

CPU

EBM

Fire

wa

ll

SSR

1553

Discretes

Spacecraft simulator

28 V Supply

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 8

InterdependenciesInterdependencies

• 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 Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 9

Flight Hardware ProcurementsFlight Hardware Procurements

• No flight hardware procured by I&T. All flight components come from a subsystem.

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 10

Flight Hardware Manufacturing Plan StatusFlight Hardware Manufacturing Plan Status

• LAT-MD-01376 LAT Integration & Test Plan In Work• LAT-MD-01137 LAT EM Test Plan In signoff • LAT-MD-01533 EGSE Plan In revision • LAT-MD-00446 SVAC Plan Released• LAT-MD-01587 SVAC Test Plan Released• LAT-MD-01598 LAT Weight and CG Test Plan Released• LAT-MD-01462 MGSE Development Plan In signoff • LAT-MD-01836 LAT Dynamics Test Performance Plan Draft in Cyberdocs• LAT-MD-01837 LAT Thermal Test Performance Plan Draft in Cyberdocs• LAT-MD-01838 LAT EMI Test Performance Plan Draft in Cyberdocs• LAT-MD-00676 LAT Assembly Sequence In revision • LAT-MD-01386 LAT Facilities Plan Released• LAT-MD-01586 LAT Survey & Alignment Performance PlanIn signoff • LAT-MD-01055 LAT Electrical Test Performance plan Released• LAT-MD-00440 LAT Particle Test Plan In signoff

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 11

Engineering Model Testing Closure StatusEngineering 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 18th and then

make available to Flight Software.• Complete EM Calibration by October 12th.• 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 13th.• CAL EM on the NRL loading dock and the TKR mini-tower in

Italian Customs by October 17th.• Support the GSI Beam Test, including the CAL and the TKR

mini-tower (run Carbon in the daytime) November 14th – 24th.

GLAST LAT Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 12

Open Flight Design Issues/ Status TradesOpen 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 Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 13

Cost/Schedule Status (May Month End)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 Project LAT Planning Meeting July 17th and 18th

4.1.9 - Integration and Test 14

Issues/Concerns/Suggestions/RisksIssues/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.