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Operations CXO Status Report

Friday 16 January 2009 9.00am EST

During the last two weeks Chandra completed the observing schedule as planned.

A real-time procedure was conducted on Jan 15 to patch the ACIS flight software. The new version (44, Standard C, Optional C) includes code changes that address a number of issues such as preventing Back End Processor (BEP) telemetry packet loss under certain timing conditions and preventing a BEP reset on Front End Processor powerdown. The patch was initially loaded on Oct 1 but backed out as a conservative measure following an expected BEP reboot on Oct 5. Further testing failed to reproduce the reset and analysis suggests a single event upset as the cause. All observations following the patch reload have been nominal.

The schedule of targets for the next week is shown below and includes an observation of Eta Carinae coordinated with Suzaku.

------------------------------------------
Radiation Belts                     Jan 18
SNR1987A               ACIS-S/HETG
4U0614+091             ACIS-S/HETG
GRB090113              ACIS-S       Jan 19
4U0614+091             ACIS-S/HETG
RXJ0720-3125           HRC-S/LETG   Jan 20
SDSSJ105158.74+4017    ACIS-S
0953+254               ACIS-S
0707+476               ACIS-S
SS7317                 ACIS-S/HETG
Radiation Belts
SS7317                 ACIS-S/HETG  Jan 21
4U0614+091             ACIS-S/HETG
Eta Carinae            ACIS-S       Jan 22
BD+303639              ACIS-S
SDSSJ091342.48+3726    ACIS-S
SDSSJ1134+5259         ACIS-S       Jan 23
V1647Ori               ACIS-I
Radiation Belts
SS7317                 ACIS-S/HETG  Jan 23
4U0614+091             ACIS-S/HETG  Jan 24
Arp283                 ACIS-S
WR140                  ACIS-I       Jan 25
HESSJ1632-478          ACIS-I
HESSJ1713-381          ACIS-S
AXJ163524-4728         ACIS-S
ESO565-G006            ACIS-I

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

All spacecraft subsystems continued to support nominal operations.

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