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Friday 17 September 2004 8.00am EDT
| During the last week the observing schedule was interrupted on Sep 13
at 6:43pm due to a high radiation event. The event stopped the daily
load and activated the science instrument safing sequence (SCS
107). All actions were nominal and loads were restarted 12.00pm on Sep
15. Observations of AR Lac, XRF040825, Kepler and Sculptor Dwarf
(total 87.2 Ks) were impacted by the event. The observations of
XRF040825 and Sculptor Dwarf were rescheduled in the replan loads for
this week. An observation of GRB040912 was accepted as a Target of
Opportunity (TOO) on Sep 13 just prior to the radiation shutdown, and
was also included in the new schedule.
A small amount (<5 min) of recorder data were lost following an unexpected SRR recorder pointer reset on Sept 11. The reset occurred when 14 commands were unexpectedly re-sent by DSN during a real-time pass. Since the reset occurred during a pass, the data were subsequently recovered from the real-time stream archive. We are working closely with DSN to understand the cause of the repeated commanding. A real-time procedure was completed on Sept 15 to update the on-board ephemeris. The schedule of targets for the next week is shown below. |
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Radiation Belts Sep 20 Abell 2204 ACIS-I Swire Lockman 4 ACIS-I GRB040912 ACIS-I Sep 21 Trumpler 14 ACIS-I Radiation Belts Sep 22 Swire Lockman 6 ACIS-I PKS0745-191 ACIS-I Sep 23 Swire Lockman 7 ACIS-I Radiation Belts Sep 24 VHE J1303-63 ACIS-I Sep 25 Swire Lockman 8 ACIS-I NGC777 ACIS-I Sep 26 Swire Lockman 9 ACIS-I MACS1427.2+4407 ACIS-I Sep 27
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All spacecraft subsystems continued to support nominal operations.
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Revised: July 08, 2022