Friday 28 April 2023 9.00am EDT
During the last week, the observing schedule was interrupted due to high radiation associated with solar activity. The loads were halted at 6:34pm EDT on Apr 23 through a ground command to execute the SI Safing SCS 107. This prevented further exposure to damaging radiation for the ACIS instrument detectors. All spacecraft actions were nominal. Related real-time procedures were executed Apr 24 to update the observation identifier number to aid CXCDS processing and on Apr 27 to re-enable SCS 134. Loads for a replanned schedule were uplinked on Apr 25 with about 77ks of science time lost. Planned observations that were impacted by the interruption will be rescheduled in future weeks. Chandra passed through the 22nd, 23rd, and 24th eclipses of the season on Apr 22, Apr 25, and Apr 27 respectively, with nominal power and thermal performance. The schedule of targets for the next week is shown below. |
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PSRJ1852+0040 ACIS-S Apr 30
PSZ2G002.82+39.23 ACIS-I May 1
A2029/A2033bridge ACIS-I
MASTERJ2126+2538 ACIS-S
A2029/A2033bridge ACIS-I
2MASXJ21161028+25170 ACIS-S
A2029/A2033bridge ACIS-I
B2.42054+22B ACIS-S
A2029/A2033bridge ACIS-I May 2
PSRJ1852+0040 ACIS-S
Radiation Belts May 3
DELSJ091054.53-0414 ACIS-I
SDSSJ100407.26+61393 ACIS-S
CasA (8) ACIS-I
SDSSJ135908.35+3058 ACIS-S May 4
CasA ACIS-S
SDSSJ144503.63+36374 ACIS-S
CasA ACIS-S
ACT-CLJ1521.1+0451 ACIS-S
4C+23.56 ACIS-S
ACT-CLJ1521.1+0451 ACIS-S
NGC4586 ACIS-S May 5
PROCYON HRC-I
DELSJ091054.53-0414 ACIS-I
Radiation Belts
DELSJ091054.53-0414 ACIS-I
A1795 ACIS-I May 6
ALPHACEN HRC-I
DELSJ091054.53-0414 ACIS-I
[MOK2016b]HSCJ1423 ACIS-S May 7
SDSSJ100212.63+5208 ACIS-S
SNRG021.5-00.9 HRC-S
A1068 ACIS-S
Radiation Belts May 8------------------------------------------
All spacecraft subsystems continued to support nominal operations.
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Revised: July 08, 2022