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Operations CXO Status Report
Friday 4 April 2003, 9.00am EST
During the last week the observing schedule was replanned to include
an observation of the Gamma Ray Burster H2650 that was accepted as a 1
day turn-around Target Of Opportunity (TOO) on 28 Mar. A portion of
the raster scan observation of the NOAO field was rescheduled later in
the week.
A real-time procedure was completed on Mar 30 to perform a manual
unload of momentum using thrusters A-1 (100%), A-2 and A-3. The unload
duration was longer than expected for nominal thruster performance and
consistent with prior anomalous unloads. A software patch was uplinked
to allow collection of high sample rate telemetry of the bus current,
and the data are under analysis.
The Gyro-1 current in the Inertial Reference Unit (IRU-1) was observed
above its yellow limit level (150 mA) during a pass on April 3. The
level remained high on the subsequent pass and engineering assessment
by the design engineers and vendor is underway.
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Radiation Belts Apr 7
NGC 1831 ACIS-S
SN1006 (7 obs) ACIS-I Apr 8
Radiation Belts Apr 10
SN1006 (4 obs) ACIS-I
NGC 5746 ACIS-I Apr 11
SDSS J143030.22-0011 ACIS-S
B2 1553+24 ACIS-S
TXS 1428+370 ACIS-S Apr 12
B2 1422+26B ACIS-S
Radiation Belts
Z11598-0112 ACIS-S Apr 13
2MASS112751+243208 ACIS-S
RX J0007.0+7303 ACIS-S
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All spacecraft subsystems, with the exception of MUPS thruster A-1 as
noted above, continued to operate nominally.
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