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Operations CXO Status Report

Friday 2 October 2009 9.00am EDT

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

A real-time procedure was executed on Oct 1 to test an update to the MUPS thruster firing parameters. The flight software was temporarily patched with the updated parameters for a short, scheduled MUPS thruster firing. The thruster firing performed as expected. The firing parameter update was planned pre-launch as a maintenance activity to compensate for the decrease in thruster impulse with fuel use. As an additional benefit the updated firing parameters are expected to decrease susceptibility to thermal choking in the thrusters.

The schedule of targets for the next week is shown below

------------------------------------------
Radiation Belts                     Oct  4
ISCSJ1438+3414         ACIS-S
SDSSJ095209.56+21431   ACIS-S       Oct  6
3C88                   ACIS-S
Radiation Belts
XMMUJ0152-1338         ACIS-I       Oct  7
SPT-CL0534-5005        ACIS-I
PSRJ1357-6429          ACIS-I       Oct  8
ISCSJ1438+3414         ACIS-S
Radiation Belts                     Oct  9
SPT-CL0534-5005        ACIS-I       Oct 10
NGC1172                ACIS-S
Perseus cluster        ACIS-I

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

All spacecraft subsystems continued to support nominal operations.

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