CXC Managers Status Report

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CXC Managers Status Report

• Chandra Users Committee Meeting
• Edward M. Mattison
• 29 June 2004

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Topics

• Program Level Status
• Operations
• Mission Metrics
• Data System
• Chandra Grant Awards

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Program Level Status

• The spacecraft and science instruments continue
  to perform extremely well, and operations
  continue to be routine
• Mission was halted twice due to solar activity,
  and loads were interrupted three times for Target
  of Opportunity observations
• One minor anomaly occurred (details in Operations
  Status)
• No safe modes have occurred since last report
  (last safemode 1999)
• Science planning, data processing and data
  distribution are proceeding smoothly
• Cycle 6 Peer Review was conducted 15-17 June 04
  went very well
• 15 press releases, 2 additional image releases
  and 2 SSUs in last 6 months
• Independent Implementation Review (IIR) held
  11/18/03 yielded no findings and 2 observations.
  We submitted a final response to Observation 1,
  on peer review security, and are completing a
  preliminary response to Observation 2, on EPO
  strategy.
• Submitted financial Program Operating Plan in
  April 04. The budget staff profiles are on
  plan through FY05. We are ready to absorb HRC,
  ACIS HETG PI subcontracts 1 Oct 04.

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Operations Status

• Spacecraft
• Nominal winter eclipse season
• EPHIN exhibited another brief occurrence of the
  supply voltage being current limited due to high
  temperatures (minor anomaly). In response, the
  temperature constraints used by mission planning
  have been tightened. A time-dependent maximum
  operating temperature is in the process of being
  implemented in the mission planning guidelines.
• A diagnostic procedure was performed to test one
  possible cause of the stuck-on heater located on
  the Optical Bench Assembly in Zone 50. The power
  to a set of survival heaters, including the one
  in Zone 50, was turned off. After seeing no
  thermal response, the power was turned back on.
  The results indicated that the survival heater is
  functioning properly (i.e. it is not stuck on).
  The stuck-on heater is not causing a problem for
  operations.

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Operations Status (cont)

• Spacecraft (cont)
• Resumed performing angular momentum unloads by
  scheduling them in the weekly spacecraft command
  loads rather than initiating them from the ground
  during a real-time contact.
• In response to the failure of the -Y shutter
  motor selection relay, we patched HRC safing
  stored command sequences to remove mechanism
  commanding, in order to prevent accidental
  shutter closure.
• The on-board computer telemetry request list was
  patched to read the HRC anticoincidence shield
  and MCP event rates. This was a necessary step
  toward being able to use the HRC to monitor
  radiation in the event that the EPHIN instrument
  becomes unusable.
• Implemented use of the Chandra Radiation Model
  for predicting operating times near the radiation
  belt entry and exit. The more accurate
  predictions are expected to add 2 hours per week
  or 375 ks per year of observing time.

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Operations Status (cont)

• Science Instruments
• Science instruments are operating extremely well
• Preparations for an ACIS bake-out are proceeding
• HRC anticoincidence shield data are being
  examined as a function of radiation level in
  preparation for use in radiation safing in lieu
  of the EPHIN instrument

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Operations Status (cont)

• Load interrupt TOOs
• Date Target Request
• 03/10/04 1ES 1028511 24 hours
• 03/16/04 GRS 1915105 3 days
• 05/25/04 SGR 1806-20 3 days
• Operations Ground System Updates
• Date Version Change
• 01/15/04 ONLS 3.9.4 Support Linux migration,
  script fixes
• 03/05/04 FOT tools Fix Sausage command checker,
  other tools
• 04/09/04 FOT tools Enhance Sausage
• 05/12/04 OFLS 10.3 Chandra radiation model, rad
  zone
• automation
• 05/12/04 FOT tools Enhance to support OFLS 10.3

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Mission MetricsMUPS Fuel Usage
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Mission Metrics (cont)
MUPS Warm Start Count
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Mission Metrics (cont) Scheduled Observing
Efficiency
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Mission Metrics (cont)Observing Time
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Data System

• Data processing
• Average time from observation to data delivery
  has continued at lt1 week
• CIAO and Data System Software Releases
• Date Release Contents include
• 01/30/04 DS 7.2 MTA phase IIa, Webchaser upgrade
• 03/16/04 DS 7.2.1 Cycle 6 proposal software
• 04/22/04 DS 7.2.2 Fix to multimon
• 06/23/04 DS 7.3 Repro3 tools, archive VV, L3
  (beta) pipeline tools
• 06/23/04 CIAO 3.1 ACIS time-dependent gain,
  mkacisrmf
• Grant Awards
• Grant award process continues to be nominal
• Transition to new Smithsonian-wide MIS system is
  still being felt 3 weeks to grant award
  (had been 1 week)

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Data Delivery Effectiveness
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Chandra Grant Awards