1. Integration and Test GLAST Large Area Telescope:
Gamma-ray Large Area Space Telescope
GLAST Large Area Telescope:
Pre-Environmental Test Review
Integration and Test
Ken Fouts
SLAC

2. Overview Review Current Status LAT Instrument Configuration
Procedure Status
Review Plan for Environmental Test
Organization
Pathfinding Summary
LAT I&T Operations at NRL
EGSE/MGSE Readiness
Test Configurations and flow
Schedule Review

3. Current Configuration
As built configuration
LAT-DS-1624 LAT Top Assembly
Radiators
ACD, Radiator & LAT MLI

4. I&T Process Procedures
Document
Title
Status
LAT-PS
Fastener Installation and Torqueing Procedure
Released
LAT-PS
Connector Mate and Demate
LAT-MD
LAT I&T eLog Book Implementation Plan
LAT-PS
Flight Hardware Bag and Purge Procedure
LAT-PS
AeroGo Bearing Reference Guide
LAT-PS
LAT Data Collection Procedure
LAT-MD
LAT EGSE Plan
I&T Standard Processes will continue to be used at NRL

5. Key Documents for Environmental Test
Title
Status
LAT-PS-6898
LAT Environmental Test Implementation Plan
In Signoff
LAT-PS
LAT Shipping Container Procedure
Released
LAT-PS-07728
LAT Environmental Test Handling Procedure
LAT-MD
LAT Environmental Test Sequence
LAT-MD
LAT Dynamics Test Plan
LAT-MD
LAT Thermal Vacuum Test Plan
LAT-MD
LAT EMI/EMC Test Plan
LAT-DS-7411
LAT Environmental Test Wiring Diagram
Key Environmental Test Planning has been completed

6. Environmental Test Configuration Drawings
Title
Status
LAT-DS-06188
Acoustic Test Configuration Assembly
Released
LAT-DS-06185
Thermal-Vacuum Test Configuration Assembly
Draft
LAT-DS-06187
Horizontal Vibration Test Configuration Assembly
LAT-DS-06190
Vertical Vibration Test Configuration Assembly
LAT-DS-06186
Handling Configuration Assembly
LAT-DS-06184
Transport Configuration Assembly
LAT-DS-06189
EMI/EMC Test Configuration Assembly
LAT-DS-06191
Mass Properties Configuration Assembly
LAT Instrument Configuration for Environmental Tests is documented

7. I&T Documentation
Drawings
(Mechanical Assembly,
Cabling, EGSE/MGSE interface, etc.)
Test Performance and Operation Plan
LAT-MD-02730
Test Sequence
LAT-MD-00676
LAT Environmental Test Plans
I&T Operating Processes and Procedures
QA and Archive
Assembly Instruction
Data Sheet (AIDS)
Electronic Logbooks
(Component installation, Mate/Demate, Etc.)
Non-Conformance Report (NCR)
CM processes for document control, release and completion will be maintained.

8. LAT Environmental Test Organization
Environmental Test Management Team is in place work planning and scheduling

9. LAT I&T Team has a proven track record for safe program execution

10. Pathfinding Summary (1 of 2)
LAT Pathfinding Activity Documented in LAT-MD-07727
Objective: Identify and mitigate mechanical operations/handling risk.
Pathfinder Lifting Operations
Installation into and Removal from Shipping Container with the GPR.
Installation into and removal from the Test Stand with GPR
Onto and off of the Vibe Table with the GPR
Test Stand Turnover with Complete Mass Simulator and SLAC lift slings
Installation of the rotated test stand and LAT onto the TVAC table/Trolley
Pathfinder Move Operations
Transport weighted shipping container
Move LAT in the test stand from clean tent to Sine Vibe.
Move LAT and test stand from clean tent to EMI test chamber.
Move LAT and test into Acoustic test chamber.
Move LAT and test stand TVAC staging area and into chamber.
LAT-PS LAT Handling Procedure was developed during Pathfinding

11. Pathfinding Summary (2 of 2)
Pathfinding Miscellaneous Operations/Installations
Radiator installation/removal procedures including timed trial runs (adhesive pot life)
TVAC prep work – mount S/C simulator sink plate
TVAC configure – another rotation and install on Table/Cart
Improved handling procedures for installation and use of test stand extensions
Installation of TVAC STE – heater cages, ACD sink plates
Transport into TVAC chamber and working around LAT and STE inside chamber.
TVAC cable installation and routing
Pathfinding activity mitigated potential risk for critical handling operations

12. NRL Operating plan is similar to SLAC Operations
I&T Operating Plan
The detailed LAT I&T schedule is maintained in MS Project by the I&T Scheduler.
Schedules will be updated daily via the afternoon meeting with progress from that day.
NRL Operations
Normal work time will be 7:00am-8:00pm. “Shifts” will run nominally 7:00am-4:00pm and 12:00am-8:00pm. Shifts will be adjusted to go around the clock as the need arises.
Daily morning meeting at 7:00am and afternoon meeting at 3:00pm.
Daily phone tag-up to SLAC at 4:00pm.
Minimum staff when the instrument is under test is 2 LAT Electrical Test staff members.
TVAC will be staffed 24/7
Extended shifts and/or Saturdays will be used to maintain schedule as required.
LAT Instrument Handling
LAT will be configured in the portable clean tent whenever possible.
The LAT will be bagged to maintain cleanliness when outside of the controlled environment.
Cleanroom and ESD protocol will be maintained during all LAT handling operations.
NRL Operating plan is similar to SLAC Operations

13. Troubleshooting in I&T
No troubleshooting will be done without appropriate disposition on an NCR.
When an anomaly occurs:
The test set-up is frozen
The instrument and test equipment is safed.
The test set-up and instrument configuration is reviewed and documented by the Test Conductor.
Test conductor notifies the TD, Subsystem Engineer and QA.
QA initiates an NCR with information from TC and convenes MRB.
At a minimum, MRB consists of the Test Director, Test Conductor, Subsystem Engineer and QA.
MRB will provide detailed disposition for troubleshooting.
The test procedure will be redlined or a separate procedure will be written (as defined by MRB) to document the troubleshooting activity defined in the disposition.
Troubleshooting will be done in accordance with the I&T Implementation Plan

14. Problem Resolution in I&T
False Alarm!
Issue
Closed
Problem Observed
Inspection, Testing,
Data Analysis
(HW, SW, Data)
Test Conductor
Error
Corrective Actions No
Flight HW
Damaged
Non Conformance Report (NCR)
Test
Procedure/Set Up
Error
Test Equipment
Problem
Yes
Categorize by
Test Conductor and/or
Test Director
Possible
Flight HW Failure
HW MRB
Troubleshoot HW
Root Cause Identified
Corrective Actions
Possible
Flight SW
Failure
SW JIRA
Troubleshoot SW
Root Cause Identified
Corrective Actions
CCB Action
Problem Resolution will continue to use the NCR process

15. Network Configuration for LAT Operations at NRL
VSC and Power Rack will move with the LAT Instrument

16. LAT I&T CCB Controls Test Configuration
Software packages listed below are controlled by CCB in the locations listed
LAT-MD LAT I&T CM/CCB Procedure establishes the process for configuration control of flight and test software installed on the LAT and EGSE test stations.
LAT I&T CCB is held on an as needed basis and requires the following minimum representation:
I&T Manager (CCB Chair)
I&T Electrical Test Lead
Systems Engineering
Online Manager
Flight Software
Quality Assurance
DAQ Electronics
LAT I&T CCB has been successful in controlling software installation/changes

17. Environmental Test MGSE/STE
Transport Container
Manufacture complete; Analyses complete
Proof test complete
Demo Road Test complete
Available at SLAC
Test Interface Plate
Complete
Test Stand/Spreader Bars
Complete, used in pathfinding
TVAC Sink Plates – ACD & S/C Simulator
Complete, used in pathfinding 2
TVAC Cal-Rod Cage
Acoustic Simulator
Mass Properties Plate
Load Cell Interface in manufacture – Complete
All MGSE has been used in dry run or pathfinding activity

18. GPR, Lift Fixture Proof Test at SLAC
Proof Test of the 4x4 Lift Fixture and GPR
Rotation Stand w/ GPR Proof Test

19. NRL Facility has been upgraded to meet LAT Operational Requirements
Facilities
Thermal Vacuum Test
Cables and Port Plates – complete
Mechanical analyses complete
Trolley (cart) – complete, used in pathfinding
Chamber rails upgrade – complete and proof tested
Pathfinding 2 – complete
Chamber refurb, cleaning and recommissioning - complete
GSE bakeout and STE Validation – ECD: 5/16/06
Acoustic Test
Ramp manufacture complete
Vibration Test
Expander head load frame procurement - delivered
Load frame manufacture – complete
Installation and proof test - complete
EMI/EMC Test
Ramp manufacture – complete, used in pathfinding
NRL Facility has been upgraded to meet LAT Operational Requirements

20. Environmental Test Sequence
Baseline
Ship to
Rev date: 24 April 2006 C F S
NRL
NRL
Post-Ship
at SLAC
Sine Vibe
EMI/EMC
Acoustic
Receive, C
Mount T
Unpack L E L L L L L
Radiators L L
Pre Post -
Axis
Pre - TV T -
Bal T -
Cycle
Final
Weight
Remove
Radiators CG
Pack LAT
Ship to C S L S L C C F S
Spectrum
TESTING IN THERMAL VAC CHAMBER L L
Limited Performance Test
Limited Performance Test F F
LAT Functional and FSW Test C C
Comprehensive Performance Test
Comprehensive Performance Test T T
TCS Functional Test
TCS Functional Test S S
SVAC Test
SVAC Test E E
EMI/EMC Emissions/Susceptibility Test
EMI/EMC Emissions/Susceptibility Test

21. Sine Vibe Configuration

22. Vibration Facility Layou

23. Radiator Installation
Radiator flange access
Radiator installation test

24. EMI/EMC Test Configuration

25. EMI Chamber Layout

26. Acoustic Test Configuration

27. Acoustic Test Layout

28. TVAC Configuration

29. Thermal STE Heater Cage Configuration S/C Sink Plate Configuration
Installation of ACD Sink Plate Panels (5)

30. TVAC Layout

31. Environmental Test Schedule (1 of 3)

32. Environmental Test Schedule (2 of 3)

33. Environmental Test Schedule (3 of 3)

34. Staffing Plan Current staffing plan for NRL:
Single long shift 5-6 days per week for Sine Vibe, Acoustic, EMI/EMC tests.
24/7 staffing for TVAC duration.
SLAC will average 14 people including
I&T Management
I&T Electrical
I&T Mechanical
Mechanical Design
Online
SVAC QA
DAQ

35. Staffing Plan (1 of 2)

36. Staffing Plan (2 of 2)

37. Environmental Test Staffing Summary

38. Summary
The LAT baseline performance has been demonstrated post shipment to NRL.
The LAT instrument as-built configuration is in accordance with current engineering.
Documentation, preparation and pathfinding for handling and configuring the LAT for Environmental Test have been completed.
All EGSE and MGSE has been identified and its use has been demonstrated.
LAT I&T has completed the necessary preparation to begin the LAT Instrument Environmental Test.