CXC Managers Status Report

1
CXC Managers Status Report

• Chandra Users Committee Meeting
• Roger J. Brissenden
• 12 January 2004

2
Topics

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

3
Program Level Status

• Spacecraft continues to perform extremely well
  overall and operations continue to be routine
  (despite very high solar activity in Oct-Nov)
• Swapped Inertial Reference Units in July
  retaining noisy gyro as backup unit. First major
  unit swap of the mission went smoothly.
• Three minor anomalies occurred (details follow)
• No safe modes have occurred since last report
  (last safemode 1999)
• Science planning, data processing and
  distribution are proceeding smoothly
• Cycle 6 Call for Proposals was issued 12/15/03
• 16 press releases, 1 video release and 1 SSU in
  last 6 months.
• Independent Implementation Review (IIR) was held
  11/18/03 with no findings and 2 observations. No
  significant actions.
• CXC contract transitioned smoothly from the old
  to new contract on 9/1/03
• The plan for meeting the out-year budget profile
  is on-track for FY04 with no significant
  near-term budget or staffing concerns
• Congratulations to Harvey and Martin on winning
  the Rossi!

4
Operations Status

• Spacecraft
• Completed swap from IRU-1 to IRU-2 on 19 July to
  retain the use of gyro-1 as a backup in the event
  of safemode.
• Implemented a software patch to decrease the
  number of unwanted radiation shutdowns on
  radiation belt entry - no cases since patch
• Nominal summer eclipse season
• Cooled Aspect Camera CCD from 10 deg to 15 deg
  to reduce warm pixels. Dark current calibration
  indicates expected reduction of 50
• Impulse event thought to be from a Leonids
  meteoroid no indication of adverse affect on
  systems
• EPHIN supply voltage current limited at high
  temperatures attitudes are being selected to
  avoid high temperatures
• An Optical Bench Assembly heater zone was
  detected on 12/22/03 in apparent stuck on state
  resulting in 3-4 deg F increase temperature. No
  science impact seen. Fault tree under development.

5
Operations Status

• 8 executions of SCS 107 to halt observing due to
  high solar activity
• Extremely high solar activity in Oct-Nov resulted
  in a significant decrease in observing efficiency
  (reduced from 70 to 45)
• Increased ACIS CTI degradation is expected (1
  year of budget)
• 4 load interrupt TOOs successfully observed
• Science Instruments operating extremely well
  overall
• ACIS bakeout decision expected March 04 for
  possible April bakeout
• HRC Y shutter failed to insert due to motor
  controller selection failure anomaly under
  investigation. Operations impact low since
  shutter is rarely used. Flight Software mod will
  limit mechanism motions during safeing
• Investigating using HRC anticoincidence shield as
  alternate radiation detector in response to EPHIN
  thermal trend
• Completed relocation of the ASVT (spacecraft
  simulator) from the West Coast to the OCC.
  Transfer resulted in more direct access to
  equipment for procedure testing and patch
  development.

6
Impulse (Leonid) Event 11/15/03
7
Aspect Camera Performance (cooled CCD)

• Dark current decreased 50 following cool-down
• Distribution before cool down (red) shifts left
  after cool-down (black) early mission
  distribution (green)

• Fraction of warm pixels (gt200 electrons/s)
  decreased sharply following cool-down
• Result is improved centroiding

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Operations Status

• Load interrupt TOOs
• Date Target Request
• 06/30/03 Mrk 421 24 hours
• 07/23/03 H2777 3 days
• 12/02/03 GRS 1915105 3 days
• 12/24/03 GRB021220 3 days
• Operations Ground System Updates
• Date Version Change
• 06/25/03 ONLS 3.9.3 New DSN data types and fixes
• 06/27/03 ONLS 3.9.3 Rollback
• 07/15/03 GRETA 2.1 Multiple fixes and
  enhancements

9
Mission Metrics MUPS Fuel Usage
10
MUPS Warm Start Count
11
Scheduled Observing Efficiency
12
Cumulative Observations for NRA-4
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Data Systems

• Data processing
• Average time from observation to data delivery
  has continued at lt1 week
• CIAO and Data System Software Releases
• Date Release Content includes
• 07/03/03 ATOMDB 1.3.1 Models extended to 50 keV
• 08/06/03 CIAO 3.0 Major release
• 09/03/03 CXCDS 7.0 Major infrastructure release
• 09/16/03 CIAO 3.0.1 Data model and Sherpa fixes
• 12/15/03 CIAO 3.0.2 Cycle 6 Proposal tools and
  fixes
• 12/30/03 CXCDS 7.1 Cycle 6 Proposal web tools
• Grant Awards
• Cycle 5 archive and theory grants issued Dec 03
  Jan 04
• Impact of transition to new Smithsonian-wide MIS
  system still being felt, with 3 weeks to grant
  award (had been 1 week)

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Data Delivery Effectiveness
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Chandra Grant Awards