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Operations CXO Status Report

Friday 25 August 2000 2.00pm EDT

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

A software patch to SCS 82 was uplinked on Aug 20 during a real-time contact. The patch will ensure that the correct action is taken in the (unlikely) event of a safing action during a grating motion.

During the next week the Observatory will pass through the 1st and 2nd Earth eclipses of the 2000 Fall season. The 1st eclipse at 11.04pm EDT on Aug 30 will be 55.5 minutes in duration and the 2nd at 2.26pm EDT on Sept 2 will last for 76.0 minutes. Both eclipses are classed as medium duration and will be handled by the electrical power system in the same way as for the medium eclipses during previous seasons.

The planned observations for the coming week are as follows.

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PKS 0745-191 ACIS-S Aug 28 Vela Shrapnel A ACIS-S Aug 29 RX J0439+0520 ACIS-I NGC 1052 ACIS-S M33 ACIS-S NGC 404 ACIS-S Aug 30 AX J2018+1139 ACIS-I 1E 1740.7-2942 ACIS-I 1746.7-3224 Van der ACIS-S Eclipse-1 55.5 min Radiation Belts Aug 31 G21.5-0.9 (multiple) HRC-S Cygnus Loop ACIS-I Sep 1 G21.5-0.9 (multiple) ACIS-I Eclipse-2 76.0 min Radiation Belts Sep 2 A2052 ACIS-S Sep 3 NGC 5273 ACIS-S ZWCL 1358+6245 ACIS-S

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All spacecraft subsystems continued to operate nominally.

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