GLAST Proposal Review

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GLAST Large Area Telescope Instrument Science
Operations Center Overview and Status Rob
Cameron Stanford Linear Accelerator
Center rac_at_slac.stanford.edu
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Outline

• GLAST Mission Operations Elements
• ISOC Functions and Organization
• Flight Operations in the ISOC
• Science Operations in the ISOC
• Pre-launch Operations Testing
• ISOC Facilities at SLAC
• Summary

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GLAST MISSION ELEMENTS
GLAST MISSION OPERATIONS ELEMENTS
Large Area Telescope GBM
m

sec
GPS

-

Telemetry 1 kbps
GLAST Spacecraft

TDRSS SN S Ku
DELTA 7920H


S
-
-

GN

LAT Instrument Science Operations Center
White Sands
HEASARC GSFC
Archive
Mission Operations Center (MOC)
GLAST Science Support Center
Schedules
GBM Instrument Operations Center
GRB Coordinates Network
Alerts
Data, Command Loads
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LAT ISOC Activities

• The LAT ISOC is organized to
• Operate the instrument, in conjunction with other
  GLAST ground elements
• Generate reconstructed LAT events and automated
  science products
• Main Functions
• LAT command planning and construction
• Instrument health and safety monitoring
• Maintain and modify LAT FSW and the LAT Testbed
• LAT calibration, performance verification and
  optimization
• Process and archive LAT data
• Maintain and optimize the software that produces
  science data
• Incorporates online and offline operations
  activities for the LAT
• Extends existing pre-launch activities into
  on-orbit operations
• Supports the LAT collaboration

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ISOC Organization
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Flight Operations Preparing for On-Orbit
Operations

• Real-time commanding of the LAT through the MOC
  uses scripted PROCs
• All LAT commands in the TC database delivered to
  the MOC are included in Narrative Procedures
  (NPs)
• All procedures to be exercised during GLAST
  End-to-End tests
• Development schedule is tied to ETE schedule
• Separate procedures for activities in GLAST
  Launch and Early Orbit period (LEO)
• Contingency procedures included
• PROCs are verified against LAT testbed before use
  with GLAST

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Flight Ops Real-time Monitoring

• ISOC supports real-time activities and instrument
  monitoring during GLAST-to-ground contacts (8x
  per day)
• ISOC monitoring tools have LAT IT heritage
• Used in pre-launch End-to-End tests and Mission
  Simulations

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Flight Ops LAT Mission Planning

• Toolkit for planning weekly LAT on-orbit activity
  schedules
• LAT Activity manager
• On-board LAT Absolute Time command Sequence (ATS)
  builder
• File upload scheduler
• Science run scheduler
• Real-time PROC scheduler
• MP databases
• Orbit data and events
• FSW files
• LAT PROCs
• LAT commands
• Tested and rehearsed through GLAST Mission
  Planning Exercises

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Science Operations Science Data Processing

• Pipeline 2 infrastructure ready for ISOC
• Tested in ETE tests, Service Challenge/ISOC
  testing

Ingest L0 data
FastCopy
MOC
L0 Archive
Create data analysis ntuples
Data Receiving
Calibrations and L1 processing
Create recon files and perform event
classification
Merge Events Extract Context Extract EBF
Create digi files
Automated Science Processing
Analyze charge injection data (LCI)
Get Calibration from DB
Analyze calibration data (LPA)
Output Data Products to LAT Collaboration and
GSSC
MOOD/MOOT (config DB)
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LAT Collaboration Support for Science Operations

• Data Monitoring
• Pre-Level 1 monitoring, diagnosing low-level
  processing (INFN Pisa)
• Calibration of Subsystems
• Tracker (INFN, UCSC)
• Calorimeter (IN2P3, NRL)
• Anticoincidence Detector (GSFC, SLAC)
• Performance Diagnostics and Diagnosis
• Subsystem failure simulations (INFN Bari)
• Monitoring the high-level performance of the LAT
  (instrument response functions, timing) (INFN
  Perugia, IN2P3 Bordeaux, U. Washington)
• Automated Science Processing (aspects of)
• Development of GRB detection algorithm (GSFC,
  Ohio State, U. Denver)
• Testing of source monitoring (INFN Perugia)
• Background Monitoring
• Particle separation (e/p) (Hiroshima U.)
• Launch Early Orbit
• LAT Commissioner is J. E. Grove (NRL)
• Planning of analyses to be performed in LEO are
  being coordinated with broader LAT collaboration
• Core agenda for recent ISOC workshop in April/May
  2007
• http//confluence.slac.stanford.edu/display/ISOC/I
  SOCWorkshopApr2007Agenda

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Science Ops Instrument Response Monitoring

• Will use celestial sources for monitoring energy
  scale, energy resolution, PSF
• Tested through Service Challenge/ISOC testing

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Automated Source Processing Source Monitoring
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GLAST Operations Testing

• The ground system operates the GLAST observatory
  in Mission End-to-End (ETE) tests
• Exercise and verify operations interfaces and
  coordination
• Exercise and validate all operations procedures

Apr 3

• Mission Simulations are operations rehearsals,
  not involving the observatory
• Mission Planning Exercises simulate weekly
  mission planning cycle
• Instrument Commissioning Simulations rehearse LAT
  (GBM) activation and checkout during 60-day
  Launch and Early Ops period

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ISOC Facilities
ISOC Ops Support Area

• Construction of the ISOC operations support area
  and expansion of the LAT Dataflow lab were
  completed in January 2007
• Co-located in building 84 with ISOC staff offices
• Ops support area fully populated with
  workstations, already in use for GLAST testing
• Dataflow lab ready for installation of LAT
  calibration unit, returned in April from
  successful beam test

LAT Cal Unit _at_SLAC
LAT Dataflow Lab and Testbed
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Summary

• An ambitious GLAST ground operations test phase
  is underway, constrained by remaining Observatory
  environmental and functional testing
• All ISOC elements hard at work preparing for
  launch and mission
• The ISOC involves collaboration participation and
  support, particularly in Science Operations and
  SAS

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Backup Slides
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ISOC Glossary
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ISOC Glossary (II)
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ISOC Glossary (III)
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ISOC Glossary (IV)