News by Date
News by Category
Solar System
White Dwarfs
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Galaxy Clusters
Cosmology/Deep Field
Press Resources
Status Reports
Press Advisories
Image Releases
Release Guidelines
Image Use Policy
Web Shortcuts
Chandra Blog
RSS Feed
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Chandra @ NASA
Visit the Chandra pages at the NASA portal (opens in new window)
Image Use
Image Use Policy & Request Form
Guidelines for utilizing images, applets, movies, and animations featured in this Web Site.
Operations CXO Status Report

Friday 8 December 2006 8.00am EDT

During the last week the observing schedule was interrupted by a high radiation event that stopped the daily load at 11:16 am EST on Dec 6 and activated the science instrument safing sequence (SCS 107). All spacecraft actions were nominal and the daily load will be restarted once radiation levels have dropped sufficiently. A real-time procedure was completed on Dec 7 to uplink a maneuver-only load. The maneuver was required to avoid an earth attitude violation during the perigee passage that followed the load interruption.

A real-time procedure was executed on Dec 5 to lower the Aspect Camera CCD temperature from -16 to -17 deg C. This is the second of five 1 deg C step reductions planned to mitigate the increasing number of warm pixels. An assessment of the aspect camera data following the first reduction on Nov 27 shows an expected improvement.

Real-time procedures was executed on Dec 6 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer, and on Dec 7 to update the on-board Ephemeris.

The schedule of targets for the next week will be finalized once the
radiation levels have fallen to acceptable levels.


All spacecraft subsystems continued to support nominal operations.

Return to Status Reports