During the last 48 hours, Chandra completed observations of RX
J1159+5531 with ACIS-I, a long observation of the Lockman Hole
with HRC-I and passed through the radiation belts with the
associated ACIS CTI measurements.
Final preparations are being made for the uplink and testing
on-orbit of the SI Safing software patch. The patch will ensure
that in the event of a safing action by the spacecraft, the
Science Instruments will be placed in a safe configuration for
high radiation environments. The uplink and test is scheduled
for 2pm Monday Dec 13.
During the next 48 hours Chandra will perform a series of
calibration observations of Ar-Lac with HRC-I, observations of
NGC 1068 with HRC-S [ACIS-S; rjb], RXJ0439.0+0715 with ACIS-I,
and BAL 0256-0119, NGC 1138 and NGC 7618 with ACIS-S.
The spacecraft subsystems continued to operate nominally.
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