During the last week the observing schedule was replanned to incorporate an observation of GS1354-64, which was accepted as a Target of Opportunity on Jan 30. Scheduled observations that were impacted by the replan will be rescheduled in a future week.

A real-time procedure was executed on Jan 31 to swap the prime solid-state recorder (SSR) from the A-side to the B-side. This swap concludes a six-month interval of health and trending data collection on SSR-A.

An additional real-time procedure was executed on Feb 2 to uplink a flight software patch to allow autonomously safing the HRC instrument if either the HRC electronics temperature or the HRC -15V power supply are not within limits. Further real-time procedures were executed on Feb 2-5 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.

Real-time procedures were executed on Feb 4 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer and to perform a diagnostic dump of the Control Processing Electronics (CPE).

Chandra passed through the 8th, 9th and 10th eclipses of the season on Jan 31, Feb 3, and Feb 5 respectively, with nominal power and thermal performance.

Of note this week was the release of an update to the Portable, Interactive Multi-Mission Simulator (PIMMS) tool within the Chandra Proposal Planning Toolkit to resolve an issue with pileup calculations for ACIS subarrays.

A Chandra press release was issued on Feb 4 describing the "AstrOlympics" project that connects the amazing physical feats of the athletes competing in the Olympic Games to the spectacular physical phenomena discovered by NASA and other telescopes in space. By comparing examples of speed, acceleration, time, mass, rotation, density, and more of athletes on the ground to objects in space, viewers of AstrOlympics may find new appreciation and inspiration from both. For details, see https://chandra.harvard.edu/press/26_releases/press_020426.html

The schedule of targets for the next week is shown below and includes an observation of GS1354-64, which was accepted as a Target of Opportunity on Jan 30, and observations of GRB221009A, which was accepted as a Target of Opportunity on Dec 24.