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Operations CXO Status Report

Friday 8 July 2022 9.00am EDT

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

Real-time procedures were executed on Jul 1, Jul 2, and Jul 3 to dump OBC-A and -B memory as a follow-up to the flight software patch on Jun 30 that updated SCS 31, a stored command sequence used to reconfigure Chandra into Safe Mode, to switch from high power transmitter mode to low power. The dump will be used to update the baseline memory images maintained on the ground.

Another real-time procedure was executed on Jul 5 to check out HRC-I operation on the A-side electronics. As part of the continued evaluation of the HRC, the HRC 15V LVPS was successfully powered on for approximately 7 ks and an HRC-I science observation of Cassiopeia A of approximately 5 ks was completed.

Additional real-time procedures were executed on Jul 7 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer and to perform a diagnostic dump of the Control Processing Electronics (CPE).

The schedule of targets for the next week is shown below and includes an observation of USco, which was accepted as a Target of Opportunity on Jul 5, observations of HR5907 coordinated with NuSTAR, and an observation of Circinusgalaxy coordinated with IXPE.



------------------------------------------
        Radiation Belts                     Jul 10
        hetej1900.1-2455       ACIS-S
        DSTuc                  ACIS-S
        CentaurusA             ACIS-S/HETG  Jul 11
        hetej1900.1-2455       ACIS-S
        Circinusgalaxy         ACIS-S
        HR5907                 ACIS-S
        CentaurusA             ACIS-S/HETG  Jul 12
        PSZ2G225.93-19.99      ACIS-I
        Abell2744              ACIS-I
        GDH4                   ACIS-I       Jul 13
        Radiation Belts
        GDH4                   ACIS-I
        GDH4                   ACIS-I
        SN2009fi               ACIS-S
        hetej1900.1-2455       ACIS-S
        NGC3081                ACIS-S       Jul 14
        USco                   ACIS-S/LETG
        GDH4                   ACIS-I
        CSWA26                 ACIS-S       Jul 15
        KeplerSNR              ACIS-S/HETG
        Cen-AMM-UCD1           ACIS-S
        Radiation Belts                     Jul 16
        PSZ2G162.49-71.98      ACIS-I
        KeplerSNR              ACIS-S/HETG
        NGC3081                ACIS-S
        GDH4                   ACIS-I
        S41427+543             ACIS-S
        2XMMJ182855.9-09541    ACIS-S
        HR5907                 ACIS-S       Jul 17

------------------------------------------

All spacecraft subsystems except HRC continued to support nominal operations.

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