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Operations CXO Status Report

Friday 25 June 2010 9.00am EDT

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

Chandra passed through the seventeenth (and last) eclipse of the 2010 summer season on June 20 with nominal power and thermal performance.

Real-time procedures were executed on June 20 to disable SCS 29, to set the short-eclipse flag to false (MEDIUM), and to dump and clear the EPS glitch counters as post-eclipse season actions. A real-time procedure was executed on June 22 to configure the spacecraft for 32kb/s direct modulation downlink as part of a test of the Space Link Extension interface with the DSN. This mode could be used in a future loss-of-comm recovery since it generates the highest possible signal strength for the downlink. A second real-time procedure was executed on June 22 to monitor the performance of the MUPS thrusters during a firing at an elevated starting valve temperature. This was the fifth in a planned series of performance demonstrations, which are hoped to allow for the relaxation of the constraint on starting valve temperatures when scheduling momentum dumps. Thruster performance during the dump was nominal. A flight software patch was uplinked on June 23 to update the spacecraft strut maximum temperature health check threshold. The update is in response to increasing temperatures due to degradation of the Observatory's thermal covers during the mission. A real-time procedure was executed on June 24 to update the on-board ephemeris. Additional real-time procedures were executed on June 24-25 to dump OBC-A memory as a follow-up to the thermal health check patch. The dump will be used to update the baseline memory image maintained on the ground.

A Chandra press release was issued on June 24 announcing that Dr. Harvey Tananbaum, director of the Chandra X-ray Center, has been selected as the recipient of the 2010 Massey Award for his career accomplishments in high-energy astrophysics in space. For details see: http://chandra.harvard.edu/press/10_releases/press_062410.html

Of note this week was the Cycle 12 Peer Review held in Boston, June 21-25.

The schedule of targets for the next week is shown below and includes an observation of 4U1702-429 coordinated with RXTE.

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SDSSJ110437.46+5946 ACIS-S Jun 27 NGC2985 ACIS-S UGC05955 ACIS-S Jun 28 IC1729 ACIS-S Radiation Belts VelaPWN ACIS-S 4U1702-429 ACIS-S/HETG Jun 29 PGC064718 ACIS-S PKS0625-35 ACIS-S Jun 30 UGC02328 ACIS-S IC278 ACIS-S NGC2748 ACIS-S SDSSJ150636.30+5402 ACIS-S Radiation Belts Jul 1 SPT0528-5300 ACIS-I NGC3457 ACIS-S Terzan3 ACIS-S Jul 2 PGC1206166 ACIS-S SDSSJ135920.99+5137 ACIS-S CAMPBE ACIS-I Jul 3 Radiation Belts SPT-CL0552-5709 ACIS-I Jul 4 SPT-CL0547-5345 ACIS-I SPT-CL0534-5005 ACIS-I

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All spacecraft subsystems continued to support nominal operations.

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