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Operations CXO Status Report

Friday 9 December 2011 9.00am EST

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

A flight software patch was uplinked on Dec 6 to remove the EPHIN E150 channel from use within the on-board RadMon process for the detection of a high-radiation environment. This patch eliminates the possibility of a false trigger due thermally induced noise in the channel. Real-time procedures were executed on Dec 7 to dump OBC-A memory as a follow-up to the patch. The dump will be used to update the baseline memory image maintained on the ground. An additional real-time procedure was executed on Dec 7 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer. A real-time procedure was executed on Dec 8 to update the on-board ephemeris.

Of note this week was the release on Dec 2 of CALDB This release provides an update to the HETG grating efficiency file. For details see:

The schedule of targets for the next week is shown below

Radiation Belts                     Dec 12
         SPT-CLJ2146-4632       ACIS-I
         RXCJ0605_Field4        ACIS-I       Dec 13
         ZetaOrionis            ACIS-S/HETG
         SDSSJ082212.57+2753    ACIS-S
         A1767                  ACIS-I
         J144105.53+045454.95   ACIS-S       Dec 14
         SDSSJ1442+0920         ACIS-S
         1321+045               ACIS-S
         GJ3622                 ACIS-S
         Radiation Belts
         A401                   ACIS-I
         ABELL545               ACIS-S       Dec 16
         J1857.9-7830           ACIS-I
         A1882c                 ACIS-S       Dec 17
         Radiation Belts
         PSRB1259-63            ACIS-I
         A1882b (2 obs)         ACIS-S       Dec 18
         A1882c                 ACIS-S


All spacecraft subsystems continued to support nominal operations.

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