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Operations CXO Status Report

Friday 3 October 2008 9.00am EDT

During the last week the observing schedule was replanned to include a 40 Ks observation of the source 3C66A that was accepted as a fast turn-around Target Of Opportunity (TOO) on Oct 1. Loads were replanned and will be uplinked on Oct 3. An observation of AEGIS-3 was impacted by the TOO and will be rescheduled in a later load.

An aspect camera dark current calibration was performed from the on-board loads on Sep 29. Assessment of the data indicates nominal aspect camera performance and that the number of CCD warm pixels is increasing at the expected rate.

A real-time procedure was conducted on Oct 1 to patch the ACIS flight software. The new version (44, Standard C, Optional C) includes code changes that address a number of issues such as preventing Back End Processor (BEP) telemetry packet loss under certain timing conditions and preventing a BEP reset on Front End Processor powerdown. The patch uplink and subsequent reboot of the BEP and restart of the digital electronics housekeeping were completed nominally.

A real-time procedure was executed on Oct 1 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer.

The schedule of targets for the next week (starting with the TOO) is shown below.

------------------------------------------
3C66A                  ACIS-S       Oct  4
AEGIS-3                ACIS-I       Oct  5
EXLupi                 ACIS-I
H2356-309              HRC-S/LETG   Oct  6
Radiation Belts                     Oct  7
AEGIS-3                ACIS-I
SDSSJ0148+0001         ACIS-S
BPPsc                  ACIS-S       Oct  8
GRB080913              ACIS-S       Oct  9
2201+315               ACIS-S
Radiation Belts
AEGIS-3                ACIS-I       Oct 10
H2356-309              HRC-S/LETG
GRB080913              ACIS-S       Oct 11
BHR71-MM               ACIS-I       Oct 12

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

All spacecraft subsystems continued to support nominal operations.

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