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Operations CXO Status Report
Friday 8 Aug 2003, 3.00pm EDT
During the last week the observing schedule was interrupted following
a high radiation event at 4:39pm on Aug 1 that stopped the daily load
and activated the science instrument safing sequence (SCS 107). The
event occurred just prior to radiation belt entry and is thought to be
due to a 'puffed-up' belt state caused by high levels of coronal
stream activity. The loads were replanned and science was re-started
at radiation belt exit on Aug 2 with 4Ks of science loss.
The 2003 summer eclipse season continued with the spacecraft
exhibiting nominal power and thermal performance during eclipses on
8/1, 8/4 and 8/6. A procedure to clear a glitch counter that
incremented during the 8/4 eclipse exit was run on 8/5. The counter
increment is expected under certain timing conditions.
The observing schedule for next week is shown below and includes an
observation of AM Herculis coordinated with RXTE.
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NGC 5252 ACIS-S Aug 10
NGC 5204 X-1 ACIS-S Aug 11
SN 2002ic ACIS-S
Radiation Belts
HD37468 ACIS-S/HETG Aug 12
IC5267 ACIS-S Aug 13
NGC 5204 X-1 ACIS-S Aug 14
Radiation Belts
AM Herculis ACIS-S/HETG Aug 15
EXO0422 ACIS-I Aug 16
RX J2217.9-5941 ACIS-S
SAX J1810.8-2609 ACIS-S
NGC 5204 X-1 ACIS-S Aug 17
Radiation Belts
2MASS141850+680410 ACIS-S Aug 18
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All spacecraft subsystems, with the exception of the MUPS thruster A-1
under investigation, continued to operate nominally.
Return to 2003 Status Reports |
