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Operations CXO Status Report

Friday 10 December 2004 9.00am EST

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

Of note this week was the approval by the Flight Director's Board of the relaxation of a recently instituted Mission Planning Guideline to disallow observations at sun pitch angles greater than 150 degrees. This constraint was put in place due to the recent concern with certain propulsion line temperatures reaching the freezing point of the spacecraft's hydrazine fuel. The decision to relax the constraint came after a detailed analysis of the margin needed to insure that the lines will never freeze. The new constraint disallows observations past 168 degrees sun pitch.

The schedule of targets for the next week is shown below and includes a series of calibration observations of the oxygen rich supernova remnant, E0102-72.

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3C 191 ACIS-S Dec 12 Procyon HRC-I Radiation Belts E0102-72 (2 obs) ACIS-I Radiation Belts Dec 13 E0102-72 ACIS-I Dec 14 SDSS J031950.54-00 ACIS-S cl0318-0302 ACIS-I SDS 1321+0038 ACIS-S MKW8 ACIS-I E0102-72 (2 obs) ACIS-I Dec 15 CXOMP J084128.3+13 ACIS-S Radiation Belts E0102-72 ACIS-S Dec 16 E0102-72 ACIS-I Abell 2029 ACIS-I E0102-72 ACIS-I Dec 17 PKS 2101-490 ACIS-S E0102-72 ACIS-I E0102-72 ACIS-S NGC 2841 ACIS-S Dec 18 CL0521-2530 ACIS-I Radiation Belts Sculptor Dwarf ACIS-S Dec 19 E0102-72 (3 obs) ACIS-S CL0521-2530 ACIS-I PSR J2124-3358 ACIS-S E0102-72 (2 obs) ACIS-S Dec 20

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All spacecraft subsystems continued to support nominal operations.

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