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Integration and Test Organization ChartIntegration and Test Organization Chart

I&T&C ManagerElliott Bloom

WBS 4.1.9

I&T EngineerB. Grist

WBS 4.1.9.1

Reliability & QAD. Marsh

WBS 4.1.9.2

Environmental Test Manager

M. Lovellette

Online ManagerR. Claus

Science Verification, Analysis, and Calibration

E. do Couto e SilvaParticle Test Manager

G. Godfrey

Integration, Facilities, Configuration, and Test

L. Wai

Instrument Operations CoordinatorS. Williams

Mechanical Ground Support Equipment

TBD

I&T Preparation 4.1.9.3

EM1 Model I&T&C

Calibration Unit I&T 4.1.9.4

Flight LAT I&T 4.1.9.6

Mission I&T Support 4.1.9.7

I&T Preparation 4.1.9.3

EM1 Model I&T&C

Calibration Unit I&T 4.1.9.4

Flight LAT I&T 4.1.9.6

Mission I&T Support 4.1.9.7

I&T Preparation 4.1.9.3

Flight LAT I&T 4.1.9.6

Mission I&T Support 4.1.9.7

I&T Preparation 4.1.9.3

EM1 Model I&T&C

Calibration Unit I&T 4.1.9.4

Flight LAT I&T 4.1.9.6

Mission I&T Support 4.1.9.7

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SVAC PeopleSVAC People

Department Manager

• Eduardo do Couto e Silva - scientist - off project

Alignment and Monte Carlo Simulations

• Hiro Tajima - scientist - off project

• Garima Sahai - graduate student – off project

• Navneet Aron - graduate student – off project

Software development and overall support

• Xin Chen - software developer - on project

Database

• Ashmi Chokshi - graduate student - off project

• Jian Zhong - graduate student - on project (summer only)

EGSE interface

• Alicia Kavelaars - graduate student - off project

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LAT Performance Specifications

Science Verification, Analysis and Calibration (SVAC) Science Verification, Analysis and Calibration (SVAC) SystemSystem

CalibrationData AnalysisScience Verification

GLAST LAT SVAC Plan LAT-MD-00446

LAT-SS-00010

Science Requirement Document 443-SRD-00010

ACD, CAL, TKR SpecificationsLAT-SS-00016, LAT-SS-00017LAT-SS-00018, LAT-SS-00152LAT-SS-00152,LAT-SS-00210

Level II

Levels III and IV

APPROVED and

SIGNED !

•Mission deliverable•Basis of all SVAC work

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SVAC OverviewSVAC Overview

I&T FlowInstrument Calibrations

EM

Prototype calibration tools and procedures

Instrument Calibrations

CU – Beam Test

ScienceVerification

CU - Beam Test

MC ValidationCU- Beam Test

Instrument Calibrations

LAT

Instrument Calibrations

LAT – Environmental test

CalibratedLAT

Instrument

SVACCalibration

Products

SASInstrumentResponseFunctions

On orbitCalibrations

IOC

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SVAC System ResponsibilitiesSVAC System Responsibilities

• Capture Science and Calibration requirements from Subsystems Plans

• Prepare the SVAC plan (with continuous review from subsystems)

• To verify Science and Calibration Requirements

• Provide the final I&T calibration products to SAS and IOC

• Develop Calibration Compliance Matrices for pre and pos launch operations

• Coordinate Data Analysis (with support from subsystems) using data obtained from particle beams and cosmic rays during LAT assembly, environmental, airplane and spacecraft integration tests

• Demonstrate that the LAT is calibrated prior to launch and perform the first on-orbit calibration prior to hand off to IOC

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Particle Tests

SVAC data come from tests on several hardware units at different stages during the LAT integration

Hardware Units

• Engineering Model (EM1) 1 tower • Flight Modules (FM ) 1 tower • Calibration Unit (CU) 4 towers • LAT 16 towers

• Cosmic Ray Tests EM1, FM, CU, LAT• Particle Beam Tests CU• Environmental tests LAT• Airplane tests LAT• Spacecraft Integration LAT

(delivered by subsystems) (managed by I&T Particle Tests – G. Godfrey)

SVAC Input DataSVAC Input Data

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SVAC TimelineSVAC Timeline

Low and High Level calibrationsPrototype algorithms and databasePrototype interface with EGSE and SAS

2003 EngineeringModel 1

Final alignmentValidation of on orbit calibration schemeCalibration dependence on environmentCalibration time history prior to launch

20042005

LAT

Science Verification (Monte Carlo Validation)Low and High Level calibrations (inter tower alignment)Validation of SVAC database designValidation of on-orbit low level calibration scheme

2004

CalibrationUnit

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Developments since PDR Review - I Developments since PDR Review - I

Organization

• SAS/SVAC - Host joint calibration meetings between SAS and I&T

• reference datasets - Now meeting with Italian collaborators to discuss interface for reference calibration datasets for the Engineering Model

Documentation

• SVAC Plan – LAT-MD-00446 - approved and signed, it is the basis of the developments within SVAC. Includes validated list of calibrations.

• ICD with SAS – LAT-SS-00570 - approved and signed, SAS is the main interface for SVAC. Defines interface for FY02 activities

• SVAC Plan for the EM – LAT-MD-00530 - draft being reviewed, it is the basis of the developments of SVAC activities for the Engineering model.

Alignment and Monte Carlo (MC) Simulations

• Alignment - Preliminary results on alignment using the Balloon Flight Engineering Model data. Alignment Plan now under development.

• MC for beam test– Preliminary results for photon distributions for the Calibration Unit beam test (will be used to confirm estimated run time)

• Low Energy Photons - currently studying energy distributions for the EM

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Developments since PDR Review - IIDevelopments since PDR Review - II

Software development and overall support

• Old Simulation (pdrApp) - implemented infrastructure for generation of simulated events at the SLAC linux farm for current studies

• New Simulation (GLEAM) - studying new software code from SAS for MC simulations (NT) and participating in SAS code reviews.

• Geometry for Simulation – developed documentation scheme in conjunction with SAS. Now preparing documentation and implementation of EM geometry.

Database

•Client and server software - developed, implemented and tested a prototype database concept

•Table schema – currently developing table schema for the Engineering Model using Calorimeter as prototype

EGSE interface

•Data format - being handled now by Online

•EGSE scripts – Started discussions with IFCT to inherit EGESE scripts that may be needed for calibration

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Impact from schedule changesImpact from schedule changes

Engineering Model activities

• No significant impact

CDR

• Will have more time to prepare for CDR

Calibration Unit activities

• Delayed preparation of final drafts of documentation (since it is too early to capture correctly all requirements)

• ICD with SAS is ready for signatures, but this delay implies that the ICD will have to be revisited some months later.

• Delayed beginning of some activities related to new Monte Carlo Simulations.