Manager's CXC Status Report
Chandra Users' Committee Meeting Edward M. Mattison
29 June 2004
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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29 June 2004
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 (con't)
Spacecraft (con't)
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 (con't)
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 (con't)
Load interrupt TOOs
Date 03/10/04 03/16/04 05/25/04 Target 1ES 1028+511 GRS 1915+105 SGR 1806-20 Request 24 hours 3 days 3 days
Operations Ground System Updates
Date 01/15/04 03/05/04 04/09/04 05/12/04 05/12/04 Version ONLS 3.9.4 FOT tools FOT tools OFLS 10.3 FOT tools Change Support Linux migration, script fixes Fix Sausage command checker, other tools Enhance Sausage Chandra radiation model, rad zone automation Enhance to support OFLS 10.3
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Mission Metrics
MUPS Fuel Usage
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Mission Metrics (con't)
MUPS Warm Start Count
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Mission Metrics (con't)
Scheduled Observing Efficiency
0.80 0.75 0.70 0.65 0.60
Scheduled Efficiency
0.55 0.50 0.45 0.40
Jun-03
Jul-03
Aug-03
Sep-03
Oct-03
Nov-03
Dec-03
Jan-04
Feb-04
Mar-04
Apr-04
May-04
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Mission Metrics (con't)
Observing Time
2000 1800 1600 1400 1200 1000 800 600 Noncal sched Calib sched
Observing time per month (ks)
200 0
Jun-03 Jul-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04 May-04
400
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Data System
Data processing
Average time from observation to data delivery has continued at <1 week
CIAO and Data System Software Releases Date
01/30/04 03/16/04 04/22/04 06/23/04 06/23/04 DS 7.2
Release Contents include:
MTA phase IIa, Webchaser upgrade DS 7.2.1 Cycle 6 proposal software DS 7.2.2 Fix to multimon DS 7.3 Repro3 tools, archive V&V, L3 (beta) pipeline & tools
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
As of middle of following month
Month Number of Days to Data Delivery Number Obs Deliv Min Avg Max
51 53 60 54 36 89 43 65 59 53 36 50 1 1 0 1 1 0 1 0 0 1 1 0 6 ...