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CXC Manager’s Status Report

This report provides updates on the program-level status, operations, mission metrics, data system, and Chandra grant awards discussed during the Chandra Users' Committee Meeting.

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CXC Manager’s Status Report

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  1. CXC Manager’s 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 CXC Status Report/CUC

  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! CXC Status Report/CUC

  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. CXC Status Report/CUC

  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. CXC Status Report/CUC

  6. Impulse (Leonid) Event 11/15/03 CXC Status Report/CUC

  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 (>200 electrons/s) decreased sharply following cool-down • Result is improved centroiding CXC Status Report/CUC

  8. 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 1915+105 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 CXC Status Report/CUC

  9. Mission Metrics MUPS Fuel Usage CXC Status Report/CUC

  10. MUPS Warm Start Count CXC Status Report/CUC

  11. Scheduled Observing Efficiency CXC Status Report/CUC

  12. Cumulative Observations for NRA-4 CXC Status Report/CUC

  13. Data Systems • Data processing • Average time from observation to data delivery has continued at <1 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) CXC Status Report/CUC

  14. Data Delivery Effectiveness CXC Status Report/CUC

  15. Chandra Grant Awards CXC Status Report/CUC

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