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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.

------------------------------------------
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

------------------------------------------

All spacecraft subsystems continued to support nominal operations.

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