See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L8593. Start at 030:14:00 GMT PLAN ---- Start in radiation zone Then: 2023:030:16:17:39 Grating: NONE 2023:030:16:26:29 RADMON Enable 2023:030:16:44:23 Obsid: 26645 SI: ACIS-S (40 ksec) Target: AT2022tsd 2023:031:04:30:59 Obsid: 25869 SI: ACIS-I (15 ksec) Target: DELS J091054.53 2023:031:09:18:49 Obsid: 25178 SI: ACIS-I (2 ksec) Target: DGPS J160716.9- 2023:031:10:28:29 Obsid: 26618 SI: ACIS-I (25 ksec) Target: PSR J1136-5525 NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 9 Supports Completed over the weekend (Total time: 20.3 hours) 11 SSR dumps Loads good through: 2023:036:20:04:06.000 CAP's - 1668, 027/1508z, 2023 MUPS-A Hardware Checkout of A3 and A4 As documented in Flight Note 537A, the most likely root cause of MUPS -B2's lack of thrust is a failed SP0371 splice within the wiring harness. It is suspected that this splice failed due to high temperatures at some point during MUPS-B2's 14 years of inactivity. As a lesson learned, it is recommended that all thrusters be fired annually, with exceptions as needed, in order to ascertain state of health. The intent of this procedure is to fire (nominally) ten pulses on MUPS-A3 and A4. Additional pulses will be fired as needed. Two SCSs will be loaded and run at PROP/PCAD's discretion, one with commanding for each thruster individually. The timing will match that of the OBC in terms of pulse width (200 ms) and firing period (2.5625 sec). Sufficient time (> 2 minutes) will be left between all thruster firings to allow for rate and attitude error settling. Contingency measures will be in place as needed. Care will be taken to restore the system momentum to acceptable values by the end of the procedure. Contingency Commands were used to disable MUPS-A valve power and close Isovalve 3. Radiation: Solar activity is expected to be low with a slight chance for an M-class flare on days one, two, and three (30 Jan, 31 Jan, 01 Feb). MP: HRC test loads are out for review by Wednesday 5pm. ENG: Successful completion of MUPS-A3 checkout. A3 response was stronger than expected and MUPS-A4 checkout was stopped. Subsequent analysis showed that A3 performance was nominal and MUPS-A4 checkout will be rescheduled for the next week. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 25782 ngc 4631 ACIS-S NONE 26700 ESO 103-35 ACIS-S NONE 25882 DELS J091054.53-041406.8 ACIS-I NONE 27681 Abell 2744 ACIS-I NONE 27680 Abell 2744 ACIS-I NONE 27677 DELS J091054.53-041406.8 ACIS-I NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 030/1215-1430 1315 1415 DSS-26 GOLDSTONE 0815-0915 EST, Mon 30 Jan 030/2130-2345 2230 2330 DSS-36 CANBERRA 1730-1830 EST, Mon 30 Jan 031/0230-0445 0330 0430 DSS-56 MADRID 2230-2330 EST, Mon 30 Jan 031/1020-1235 1120 1220 DSS-26 GOLDSTONE 0620-0720 EST, Tue 31 Jan 031/1345-1600 1445 1545 DSS-26 GOLDSTONE 0945-1045 EST, Tue 31 Jan SNAPSHOT summary: ----------------- UTC 2023:030:13:55:01 (Jan30) f_ACE 6.26e+01 F_CRM 0.00e+00 Kp 1.0 R km 46658A OBT 2023:030:13:54:33 CTUVCDU 121599 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 791474073.95 ONLVCDU 121592 OBC Errs 0 OBSID 44840 EPState SUN SIM TTpos -99616 HETG Angle 5.59 PCADMODE NPNT RA 24.898 Bus V 27.58 SIM FApos -535 LETG Angle 76.09 PCONTROL NPNT Dec 57.600 Bus I 19.28 AOFSTAR GUID Roll 294.072 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -0.20 Yaw Rate 0.52 HRC-S HV OFF ACA CCD Temp -9.9 Dith Zang 4.28 Pitch Rate -0.13 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.09 EVT RT 5354 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa -0.32 Batt 1 SOC 100.00% Avg HRMA Temp 71.73 FSS Beta -6.21 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 62.78 SA Resolv 96.18 Batt 3 SOC 100.00% A +15 V 2.81 OBA Tavg Fault NFLT SA Sun Pres ILLM A +5 V 4.84 OBA Trng Fault NFLT +Y SA Amps 9.66 A +24 V 0.00 HRMA power 5.90 SCS 128 ACT -Y SA Amps 9.48 OBA power 0.00 SCS 129 ACT +Y SA Temp 118.41 SCS 130 ACT -Y SA Temp 117.68 ACIS Stat7-0 6 Roll Mom. 7.871 SCS 131 ACT Cold Rad -113. Pitch Mom. 13.842 SCS 132 ACT Ephin Temp 0.0000 Warm Rad -74.7 Yaw Mom. 3.154 SCS 133 ACT EIO Temp 0.0000 RadMon DISA PMTANKP 135.744 SCS 107 INAC EPH temp 169.78 UpLCmdAcc 47576 IRU2G2 curr 115.20 M Unload MON Cmd Rej A 200 IRU2G1 curr 96.00 Roll Bias 1.2116 TSC Move STOP Prop. line 03 142.92 Pitch Bias -3.2849 FA Move STOP CTX A PWR 36.38 Prop. line 04 110.25 Yaw Bias -1.7032 OTG Move DISA CTX A Volts 3.52 UTC 2023:030:13:55:01 (Jan30) f_ACE 6.26e+01 F_CRM 0.00e+00 Kp 1.0 R km 46658A Currently scheduled FPSI, OTG : HRC-S HETG Estimated Kp : 1.0 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 6.26e+01 GOES-R P4 flux, in RADMON P4GM units : 0.020 GOES-R P7 flux, in RADMON P41GM units : 0.006 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 289.0 Orbit Start Time : 0.008 Geocentric Distance (km), Orbit Leg : 46470 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 3.3413e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.0000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.0057e+05 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.0000e+00