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Operations CXO Status Report

Friday 25 June 2005 8.00am EDT

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

A real-time procedure was completed on 17 Jun to uplink the corrected software patch to modify the Stored Command Sequences (SCS) 107 and 84. The patch provides the capability to transition to Normal Sun Mode (NSM) following execution of the Science Instrument safing actions (SCS 107) in response to a high radiation event. The capability will be used to ensure a favorable thermal attitude for cases when stopping the loads would violate a new propulsion line thermal constraint. A second realtime procedure was completed on Jun 17 to update the onboard ephemeris.

Of note this week was the successful completion of the Cycle 7 Peer Review held in Boston, Jun 21-23.

The schedule of targets for the next week is shown below and includes observations of M81 coordinated with ground observations.

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Radiation Belts Jun 27 X1908+375 ACIS-S/HETG HD 147010 ACIS-S SGR 1627-41 ACIS-S Jun 28 MACSJ2046.0-3430 ACIS-I MACS0011.7-1523 ACIS-I PSR B1937+21 ACIS-S M81 ACIS-S Jun 29 Radiation Belts 9P/Tempel 1 (5 obs) ACIS-S Jun 30 GC-1 ACIS-I IGR J11085-5100 ACIS-I NGC 3351 ACIS-S Jul 1 Q0906+6930 ACIS-S W3 North ACIS-I Radiation Belts Jul 1 M81 ACIS-S NGC 6231 ACIS-I Jul 3

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All spacecraft subsystems continued to support nominal operations.

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