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Operations CXO Status Report

Friday 18 January 2019 9.00am EST

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

On Jan 11 a real-time procedure was executed to patch the EPS Current Monitor Threshold to a new lower value which is consistent with the reconfiguration of the battery reconditioning resistors for Battery 3 performed Jan 4. A related CAP was run to clear the EPS fault alarm induced by the Jan 4 procedure. Additional real-time procedures were executed on Jan 12-13 to dump OBC-A and -B memory as a follow-up to the patch. The dump will be used to update the baseline memory images maintained on the ground.

Another real-time procedure was executed on Jan 15 to command ACIS to dump the flight software from EEPROM. This is part of preparations for the move to the new OCC.

The schedule of targets for the next week is shown below and includes an observation of SN2018bsz, which is a follow-up to a Target of Opportunity accepted on May 31.

Radiation Belts PSRB0656p14_s7 ACIS-S SPT-CLJ0001-5440 HRC-I SPT-CLJ2355-5156 HRC-I SN2018bsz ACIS-S PGC032873 ACIS-S Jan 22 SDSSJ101000.68+3003 ACIS-S Jan 23 Radiation Belts NGC3281 ACIS-S PSRJ1709-4429 ACIS-I Jan 24 SDSSJ085051.97+08302 ACIS-S zetaPup ACIS-S/HETG PSRJ1709-4429 ACIS-I Jan 25 SN2000ew ACIS-S Radiation Belts Jan 26 PGC032873 ACIS-S 2MFGC13496_s1 ACIS-S UGC10683NED02 ACIS-S Jan 27 ClGJ092921+120505 ACIS-I PGC032873 ACIS-S


All spacecraft subsystems continued to support nominal operations.

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