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Operations CXO Status Report

Friday 16 July 2004 11:30am EDT

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

A real-time procedure was completed on July 15 to the contents of ACIS Back-end Processor (BEP) cache, EEPROM, and bulk memory, warm-boot the BEP, and re-dump. This procedure was to gather data to aid in diagnosing the cause of an unexpected early termination of a science run on June 22.

A real-time procedure was completed on July 15 to update the on-board ephemeris.

The command loads for the coming week include commanding for the first three eclipses of the summer 2004 eclipse season. The first of these eclipses, on July 18, is a penumbra-only eclipse and requires an off-point of the solar arrays to discharge the batteries sufficiently to avoid an over-voltage condition on eclipse exit. Software patches to provide the appropriate power system configuration in the event of spacecraft safing actions during the eclipse will be uplinked and the event monitored in real time on July 18.

The observing schedule for next week is shown below:

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Radiation Belts Jul 18 LBQS 2358+0216 ACIS-S Cygnus OB2 North W ACIS-I HZ43 HRC-I/LETG Jul 19 HZ43 HRC-S/LETG 70 Oph HRC-S/LETG F1450-5276 ACIS-S Jul 20 Radiation Belts PSR J1809-1917 ACIS-S Jul 21 2QZ J113900.5-0201 ACIS-S SNR1987A ACIS-S Abell 496 ACIS-S Jul 22 Radiation Belts Jul 23 SCULPTOR DWARF SPH ACIS-S Jul 24 HH 300 ACIS-I RX J105343+5735 ACIS-S F1410-4555 ACIS-S Jul 25 A2151 ACIS-I

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All spacecraft subsystems continued to support nominal operations.

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