Friday 22 December 2000 8.00am EST
| During the last week, Chandra completed the observing schedule as planned.
Last week, routine procedures were completed to update the on-board Ephemeris and conduct a check of the CPE warm start count (value remained at 1). Progress has been made in understanding why this counter incremented during the early safe-mode trips, and has been found to be caused by a subtle software timing behavior, rather than the hardware itself. Other items of note include a successful software patch to the On Line System (ONLS) on Dec 15 to fix a script operation problem. The intermittent problem was unmasked following the upgrade to a new Operating System on 2 November. The third Chandra NASA Research Announcement (NRA) is on track for release on December 28, and will call for observing and archive proposals with a due date of March 15. Observations of targets from this cycle are expected to begin in November 2001. The Mission planning team worked hard to develop a 2 week schedule to cover the holidays as shown below. Of note are the large number of time-constrained HETG observations, including that of the peer reviewed Target of Opportunity Cen X-3 and the Director's Discretionary Time TOO Cygnus X-1 that triggered last week. |
------------------------------------------
ZW3146 ACIS-S/HETG Dec 25 Radiation Belts Dec 27 Xi Uma ACIS-S/HETG Dec 28 WR140 ACIS-S/HETG Dec 29 Cen X-3 (TOO) ACIS-S/HETG Radiation Belts Dec 30 NGC 5506 ACIS-S/HETG Dec 31 N103B ACIS-S/HETG Radiation Belts Jan 1 Ty Pyx (HD77137) ACIS-S/HETG Hydra A ACIS-S/HETG Jan 2 V 0332+53 ACIS-S Cygnus X-1 (TOO) ACIS-S/HETG Jan 3 Abell 4059 ACIS-S Radiation Belts Rosette Field (multiple) ACIS-I Jan 4 WHDF ACIS-I Jan 5 A1689 ACIS-I Jan 6 Radiation Belts RXJ13434+0001 ACIS-S Jan 7 F864X:052 ACIS-S F864X:012 ACIS-S AGX J134720-1129 ACIS-I
------------------------------------------
All spacecraft subsystems continued to operate nominally.
The next report is planned for January 5 following the holiday. A Happy Holiday and New Year to everyone from the Chandra Team!
Return to Status Reports
Revised: July 08, 2022