CXC Manager’s Status Report Chandra Users’ Committee Meeting Roger J. Brissenden 12 January 2004

CXC Status Report/CUCPage 2 Topics Program Level Status Operations Mission Metrics Data System Chandra Grant Awards

12 January 2004CXC Status Report/CUCPage 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!

12 January 2004CXC Status Report/CUCPage 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.

12 January 2004CXC Status Report/CUCPage 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.

12 January 2004CXC Status Report/CUCPage 6 Impulse (Leonid) Event 11/15/03

12 January 2004CXC Status Report/CUCPage 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

12 January 2004CXC Status Report/CUCPage 8 Operations Status Load interrupt TOOs DateTargetRequest 06/30/03Mrk hours 07/23/03H days 12/02/03GRS days 12/24/03GRB days Operations Ground System Updates DateVersionChange 06/25/03ONLS 3.9.3New DSN data types and fixes 06/27/03ONLS Rollback 07/15/03GRETA 2.1Multiple fixes and enhancements

12 January 2004CXC Status Report/CUCPage 9 Mission Metrics MUPS Fuel Usage

12 January 2004CXC Status Report/CUCPage 10 MUPS Warm Start Count

12 January 2004CXC Status Report/CUCPage 11 Scheduled Observing Efficiency

12 January 2004CXC Status Report/CUCPage 12 Cumulative Observations for NRA-4

12 January 2004CXC Status Report/CUCPage 13 Data Systems Data processing –Average time from observation to data delivery has continued at <1 week CIAO and Data System Software Releases DateReleaseContent includes 07/03/03ATOMDB 1.3.1Models extended to 50 keV 08/06/03CIAO 3.0Major release 09/03/03CXCDS 7.0Major infrastructure release 09/16/03CIAO 3.0.1Data model and Sherpa fixes 12/15/03CIAO 3.0.2Cycle 6 Proposal tools and fixes 12/30/03CXCDS 7.1Cycle 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)

12 January 2004CXC Status Report/CUCPage 14 Data Delivery Effectiveness As of middle of following monthAs of 12/19 /03 MonthNumb er of Obs Days to Data DeliveryNumb er Deliv Number Outstanding Number Deliv Number Outstanding Obsids Outstanding (see below for details) MinAvgMax Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov

12 January 2004CXC Status Report/CUCPage 15 Chandra Grant Awards 5.5 GRANT AWARD FFECTIVENESS As of middle of following monthAs of 12/19/03 Month of Data Delivery No. Grants (1) No. Grants Awarded No. Outstand ing Avg days to award (2) No. Grants Awarde d No. Outstand ing Outstanding Awards Proposal no, Comments Grants to Non-Federal Institutions Dec * Jan * Feb * Mar * Apr * May * Jun* Jul * Aug * Sep * (A&B) Oct * , Nov * , * Grant awards delayed due to SAO conversion to new Institute-wide financial software system