See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L9771. Start at 112:13:00 GMT PLAN ---- Finish: Obsid: 32311 SI: ACIS-S (23 ksec) Target: SDSS J091934.51 Then: 2026:112:12:58:40 Obsid: 32311 SI: ACIS-S (23 ksec) Target: SDSS J091934.51 2026:112:19:56:07 Obsid: 32309 SI: ACIS-S (15 ksec) Target: SDSS J141525.26 2026:113:00:09:42 Grating: HETG 2026:113:00:48:32 Obsid: 31516 SI: HRC-I (13 ksec) Target: Cyg X-2 2026:113:04:39:21 Grating: NONE 2026:113:05:17:40 Obsid: 32310 SI: ACIS-S (10 ksec) Target: SDSS J141525.26 2026:113:08:07:55 Grating: LETG 2026:113:08:34:41 Obsid: 31399 SI: ACIS-S (10 ksec) Target: MKN421 2026:113:11:30:31 Grating: NONE 2026:113:11:32:29 RADMON Disable 2026:113:11:34:51 Grating: HETG NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 2 Supports Completed in the last 24 hours (Total time: 4 hours) 3 SSR dumps Loads good through: 2026:116:06:55:44 Radiation (Solar Activity): Solar activity is expected to be low with a slight chance for an M-class flare on days one, two, and three (22 Apr, 23 Apr, 24 Apr). Radiation (Geophysical Activity): The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (22 Apr, 23 Apr, 24 Apr). MP: Apr2726A load review tomorrow at 10am. ENG: No issues. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 31864 NGC 2110 ACIS-S HETG 30026 DESI J090.9854-35.9683 ACIS-I NONE 30180 NGC4941 ACIS-S NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 112/2105-2305 2150 2250 DSS-54 MADRID 1750-1850 EDT, Wed 22 Apr 113/0215-0415 0300 0400 DSS-65 MADRID 2300-0000 EDT, Wed 22 Apr 113/0915-1115 1000 1100 DSS-26 GOLDSTONE 0600-0700 EDT, Thu 23 Apr 113/1655-1855 1740 1840 DSS-36 CANBERRA 1340-1440 EDT, Thu 23 Apr SNAPSHOT summary: ----------------- UTC 2026:112:10:58:01 (Apr22) f_ACE 0.00e+00 F_CRM 1.60e+07 Kp 2.0 R km 144784A OBT 2026:112:10:55:33 CTUVCDU 5349375 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 893242533.98 ONLVCDU 5349368 OBC Errs 0 OBSID 29863 EPState SUN SIM TTpos 75624 HETG Angle 77.59 PCADMODE NPNT RA 262.316 Bus V 27.26 SIM FApos -467 LETG Angle 75.71 PCONTROL NPNT Dec -62.491 Bus I 20.83 AOFSTAR GUID Roll 54.994 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 0.99 Yaw Rate -0.02 HRC-S HV OFF ACA CCD Temp -4.7 Dith Zang 12.06 Pitch Rate -0.14 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.11 EVT RT 6374 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa 5.75 Batt 1 SOC 100.00% Avg HRMA Temp 74.00 FSS Beta -27.94 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 89.17 SA Resolv 117.05 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 10.44 A +24 V 0.00 HRMA power 29.90 SCS 128 ACT -Y SA Amps 10.06 OBA power 0.00 SCS 129 ACT +Y SA Temp 111.43 SCS 130 ACT -Y SA Temp 111.12 ACIS Stat7-0 6 Roll Mom. 0.729 SCS 131 ACT Cold Rad -118. Pitch Mom. -8.058 SCS 132 ACT Ephin Temp 0.0000 Warm Rad -77.1 Yaw Mom. 3.268 SCS 133 ACT EIO Temp 0.0000 RadMon ENAB PMTANKP 150.132 SCS 107 INAC EPH temp 138.67 UpLCmdAcc 58783 IRU2G2 curr 117.60 M Unload MON Cmd Rej A 84 IRU2G1 curr 93.60 Roll Bias 2.0058 TSC Move STOP Prop. line 03 165.53 Pitch Bias -4.2002 FA Move STOP CTX B PWR 36.92 Prop. line 04 155.32 Yaw Bias -1.8227 OTG Move DISA CTX B Volts 3.54 UTC 2026:112:12:43:01 (Apr22) f_ACE 1.28e+01 F_CRM 1.62e+07 Kp 2.0 R km 144976D Currently scheduled FPSI, OTG : ACIS-S NONE Estimated Kp : 0.7 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 9.83e+00 GOES-R P4 flux, in RADMON P4GM units : 4.05e-02 GOES-R P7 flux, in RADMON P41GM units : 5.58e-03 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 1.70e+03 Orbit Start Time : 2026:111:05:20:11 Geocentric Distance (km), Orbit Leg : 144978 D CRM Region : 2 (Magnetosheath) External Proton Flux (p/cm^2-s-sr-MeV) : 3.9942e+01 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 3.9942e+01 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.1122e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.6244e+07