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Operations CXO Status Report

Friday 25 May 2001 11.00am EDT

During the last week, Chandra completed the observing schedule as planned.

A real-time procedure was conducted on 22 May to collect raw-mode data from the ACIS S0 chip without running in squeegee mode. The procedure was run as part of an investigation into using pre-cursor events to mitigate CTI degradation on-orbit. A series of further related tests will be run from the daily-load over the next 2-3 months.

Of note this week was the approval for operations of a new version of the Off-Line System (OFLS) ground software. The new version (9.1B) provides a number of improvements and bug fixes including an increased optimization of the scheduling algorithm and a better calculation for Earth avoidance during slews. The new software is scheduled to begin operational use on May 29.

The planned observations for the coming week are shown below.

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NGC 4258 ACIS-S May 28 ARP 242 ACIS-S May 29 NGC 4382 (M85) ACIS-S LBQS 1212+1445 ACIS-S LBQS 1029-0125 ACIS-S LBQS 1442-0011 ACIS-S May 30 Radiation Belts 3C281 ACIS-S NGC4594 ACIS-S AGX J103244-1424 ACIS-I May 31 M 67 ACIS-I Abell 1204 ACIS-I MACS J1149.5+2223 ACIS-I Jun 1 MACS J1423.8+2404 ACIS-I 2MASSJ145331+1353 ACIS-I CI AQL ACIS-S NGC266 ACIS-S Radiation Belt 3C 275.1 ACIS-S Jun 2 NGC 4365 ACIS-S NGC 3585 ACIS-S Jun 3 3C 228 ACIS-S

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All spacecraft subsystems continued to operate nominally.

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