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Operations CXO Status Report
Friday 11 April 2003, 10.00am EST
During the last week Chandra completed the observing schedule as
planned.
The IRU-1 gyro-1 current has continued to display elevated and noisy
behavior above its yellow limit (150mA) but below its red limit
(200mA). Following discussions with the vendor, procedures and
products for a B-side IRU swap are being readied in the event that
they are needed. The gyro bias level has remained unaffected by the
change in current and so to date, there has been no impact to science
or operations.
A real-time procedure was completed on Apr 7 that verified the CPE
warm start count has remained unchanged at 1 since Oct 18.
The observing schedule for next week is shown below and includes 2
observations of Saturn and observations of XTE J1908+094, 1136-135,
and Cyg X-1 coordinated with the VLA, HST and RXTE respectively.
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J2044+7044 ACIS-S Apr 13
FIRST J142114+282452 ACIS-S
M87 ACIS-S Apr 14
Saturn (2 obs) ACIS-S
Radiation Belts Apr 15
F12112+0305 ACIS-S
1136-135 ACIS-S
RCS0439.6-2905 ACIS-S Apr 16
Radiation Belts Apr 17
Abell 3526 (2 obs) ACIS-S Apr 18
A1736 ACIS-I Apr 19
SDSS J145123.02-625.9 ACIS-S
XTE J1908+094 ACIS-S
Cyg X-1 ACIS-S/HETG
SDSS J143352+022714 ACIS-S Apr 20
A2063 ACIS-I
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All spacecraft subsystems, with the exception of the MUPS thruster A-1
under investigation and gyro-1 as noted above, continued to operate
nominally.
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