Operations CXO Status Report

Friday 29 August 2003 9.30am EDT

During the last week Chandra completed the observing schedule as planned. The Avionics and Software Validation Test Set (ASVT) arrived at the OCC on 24 Aug and was unloaded and set-up by the West Coast team without incident. Checkout of the system and training is proceeding on schedule this week. Testing is complete for a flight software patch that will modify the threshold criteria for triggering science instrument safing under high radiation conditions. The change is expected to significantly reduce the number of unwanted triggers just prior to radiation belt entry. The patch is planned for uplink on 2 Sept. The observing schedule for next week is shown below and includes a series of 21 calibration observations of AR Lac.

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AR Lac (21 obs)        HRC-S        Sep 1
PC 0041+0215           ACIS-S
UGC 408                ACIS-S
Radiation Belts                     Sep 2
1E0953.8+6918          ACIS-S
A1914                  ACIS-I       Sep 3
DLS J1402-1028         ACIS-I
RXJ1347.5-1145         ACIS-I
2MASS222221+195947     ACIS-S       Sep 4
FIRST J010032-020046   ACIS-S
F00188-0856            ACIS-S
A0119                  ACIS-I
Radiation Belts
NGC 5204 X-1           ACIS-S       Sep 5
MS1455.0+2232          ACIS-I
HD73952                ACIS-I       Sep 6
NGC 7793               ACIS-S

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All spacecraft subsystems, with the exception of the MUPS thruster A-1 under investigation, continued to operate nominally.

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