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Operations CXO Status Report
Friday 13 June 2003, 8.00am EDT
During the last week Chandra completed the observing schedule as
planned.
A real-time procedure was completed on June 12 to perform a warm
re-start of the noisy IRU-1 gyro-1. On re-start, the IRU-1 gyro-1
current reset from its recent level of ~140 mA to 96 mA, a value
comparable to its pre-launch level. The reset of the current is very
promising and its future trend will be monitoring carefully. IRU-2
continues in a powered on state in parallel with operations and on
June 9 a series of calibration maneuvers were executed from the daily
loads.
A momentum dump was performed on June 12 prior to the gyro-1 warm
start and was completed with nominal thruster performance. The unload
was performed at a relatively low starting temperature.
A third real-time procedure was run on June 12 to lower the ACA CCD
temperature from -12 to -13 deg C to mitigate the increasing number
of warm pixels. This is the third of five planned 1 degree step
reductions.
Of note last week was the conduct of the Chandra User's Committee
meeting on Jun 12-13.
The observing schedule for next week is shown below and includes
two observations of NGC 526A coordinated with XMM.
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Eta Carinae ACIS-S/HETG Jun 16
2MASS042032-204759 ACIS-S Jun 17
BR 0331-1622 ACIS-S
SDSS J022756+005733.1 ACIS-S
Radiation Belts
1E 1207.4-5209 ACIS-S/LETG Jun 18
X1702-429 HRC-I Jun 19
X1715-321 HRC-I
SGR A* ACIS-I
XTE J1814-338 ACIS-S/HETG
Radiation Belts Jun 20
SDSS J022841+005208.6 ACIS-S
SDSS J2215-0045 ACIS-S
NGC 526A ACIS-S/HETG
KES 27 ACIS-I Jun 21
NGC 526A ACIS-S/HETG
SN 2003BG ACIS-S Jun 22
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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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