See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L8131. Start at 298:13:00 GMT PLAN ---- Finish: 2021:298:12:03:19 Obsid: 23619 SI: ACIS-S (14 ksec) Target: PGC025363 Then: 2021:298:16:32:23 Obsid: 26184 SI: ACIS-I (11 ksec) Target: UGC 02432 2021:298:20:16:51 Grating: HETG 2021:298:20:48:58 Obsid: 23534 SI: ACIS-S (28 ksec) Target: SNR 1987A 2021:299:04:39:13 Grating: NONE 2021:299:05:05:46 Obsid: 24262 SI: ACIS-S (29 ksec) Target: DELS J041128.63 NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 8 Supports Completed over the weekend (Total time: 21 hours) 11 SSR dumps Loads good through: 2021:305:01:39:10.000 CAP's / Procedures Run: CAP # | Time | Title / Description / Notes [1591] | 296/2121z | Recovery from Day 2021:296 IU-A Reset On 23 Oct 2021 (day 2021:296) at approximately 10:41:57 UTC the Chandra observatory experienced another instance of an IU-A reset (likely due to an SEU) and subsequent transition to Normal Sun Mode. Based on analysis of the available telemetry and OBC error log entries, it appears that there have been no hardware failures at this time and a recovery from the IU reset can proceed. [1589] | 296/2221z | ET Offset Patch Uplink PR-509 Update the K constant KP.ET_Offset for the correct ephemeris time. [1592] | 296/2239z | Bright Star Hold/Normal Sun Mode Recovery On 23 Oct 2021, an unexpected IU-A reset event occurred, resulting in a transition to Normal Sun Mode. This CAP will use steps in SOP_SAFE_NSM_BSH_RECOVERY to perform recovery from this state. [675A] | 298/0105z | Re-enable SCS 107 Re-enable SCS 107 before resumption of normal operations. [750AG] | 298/1150z | Low Rate Dump of the On-line OBC Checksummed Memory (XSUM_1) Perform on-orbit OBC checksummed memory dump of the on-line OBC (address range of 0x00000 to 0x0FFFF). Radiation: Solar activity is expected to be very low with a chance for a C-class flares and a slight chance for an M-class flare on days one, two, and three (25 Oct, 26 Oct, 27 Oct). MP: Oct2521b loads return to science were approved yesterday, TOO approved that will interrupt these loads. ENG: IU reset is similar to three we've seen before. Team was able to work on saturday to return spacecraft to normal operating mode. We are in cooling attitude and have returned to science. Nothing of concern thermally. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- None Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 298/1025-1240 1125 1225 DSS-56 MADRID 0725-0825 EDT, Mon 25 Oct 298/1935-2150 2035 2135 DSS-54 MADRID 1635-1735 EDT, Mon 25 Oct 299/0005-0220 0105 0205 DSS-24 GOLDSTONE 2105-2205 EDT, Mon 25 Oct 299/1430-1645 1530 1630 DSS-54 MADRID 1130-1230 EDT, Tue 26 Oct 299/2040-2255 2140 2240 DSS-54 MADRID 1740-1840 EDT, Tue 26 Oct SNAPSHOT summary: ----------------- UTC 2021:298:12:24:02 (Oct25) f_ACE 1.89e+01 F_CRM 1.00e+00 Kp 0.0 R km 122206A OBT 2021:298:12:21:08 CTUVCDU 6824191 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 751551668.50 ONLVCDU 6824184 OBC Errs 0 OBSID 23619 EPState SUN SIM TTpos 75623 HETG Angle 77.96 PCADMODE NPNT RA 135.440 Bus V 28.05 SIM FApos -467 LETG Angle 76.46 PCONTROL NPNT Dec 0.501 Bus I 21.60 AOFSTAR GUID Roll 74.000 ACA Object FFFSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang -8.00 Yaw Rate 1.11 HRC-S HV OFF ACA CCD Temp -5.4 Dith Zang -1.44 Pitch Rate 0.37 SHLD HV 8.0 ACA Int Time 1.698 Roll Rate -0.01 EVT RT 255 AOACSTAT OK FSS SunBeta SUN SHLD RT 4844 FSS Alfa 2.85 Batt 1 SOC 100.00% Avg HRMA Temp 73.31 FSS Beta 14.87 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 66.31 SA Resolv 74.79 Batt 3 SOC 100.00% Cold Rad -118.3 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -77.1 OBA Trng Fault NFLT +Y SA Amps 10.63 RadMon ENAB HRMA power 0.00 SCS 128 ACT -Y SA Amps 10.63 OBA power 78.70 SCS 129 ACT +Y SA Temp 115.85 SCS 130 ACT -Y SA Temp 115.49 Roll Mom. 3.668 SCS 131 ACT Pitch Mom. -12.431 SCS 132 ACT Ephin Temp 0.0000 UpLCmdAcc 56485 Yaw Mom. 2.045 SCS 133 ACT EIO Temp 0.0000 Cmd Rej A 97 PMTANKP 135.744 SCS 107 INAC EPH temp 130.12 IRU2G2 curr 115.20 M Unload MON IRU2G1 curr 93.60 Roll Bias 0.8194 TSC Move STOP Prop. line 03 127.54 Pitch Bias -2.8679 CTX A PWR 36.38 FA Move STOP Prop. line 04 105.75 Yaw Bias -1.6320 CTX A Volts 3.52 OTG Move DISA UTC 2021:298:12:53:01 (Oct25) f_ACE 2.04e+01 F_CRM 1.00e+00 Kp 0.0 R km 122206A Currently scheduled FPSI, OTG : ACIS-S NONE Estimated Kp : 0.0 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 2.03e+01 GOES-R P4 flux, in RADMON P4GM units : 0.019 GOES-R P7 flux, in RADMON P41GM units : 0.030 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 4.0 Orbit Start Time : 2021:199:20:19:01 Geocentric Distance (km), Orbit Leg : 122206 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.4809e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 1.4809e+02 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.0136e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 3.5965e+09 Due to transition to GOES-16, what used to be P2 is now P4 and what used to be P5 is now P7 This message will dissappear in 01/31/2021