See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L9903. Start at 244:13:00 GMT PLAN ---- Finish: Obsid: 31881 SI: ACIS-I (30 ksec) Target: Perseus cluster Then: 2026:244:15:12:57 Obsid: 32530 SI: HRC-I (8 ksec) Target: G29-38 2026:244:18:09:19 Obsid: 30402 SI: ACIS-S (34 ksec) Target: ClG J0242-2132 2026:245:04:18:24 Obsid: 30441 SI: HRC-I (5 ksec) Target: G29-38 2026:245:06:23:38 Obsid: 32520 SI: ACIS-I (10 ksec) Target: UGC 05479 2026:245:09:53:42 Obsid: 32517 SI: ACIS-S (10 ksec) Target: SDSSJ222024.58+ NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 4 Supports Completed in the last 24 hours (Total time: 8 hours) 3 SSR dumps. Loads good through: 2026:249:02:56:45 Radiation (Solar Activity): Solar activity is likely to be low with a slight chance for an M-class flare on days one, two, and three (01 Sep, 02 Sep, 03 Sep). Radiation (Geophysical Activity): The geomagnetic field is expected to be at quiet to unsettled levels on day one (01 Sep) and quiet levels on days two and three (02 Sep, 03 Sep). MP: Sep 07 loads in work. ENG: No issues. GOT/FST: There are some issues related to the SAO/SI address transition. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 32529 Abell 2255 ACIS-I NONE 30196 NGC5728 ACIS-S NONE 32535 SRGA J174800.5-280826 ACIS-S NONE 30424 Abell 2255 ACIS-I NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 244/1245-1445 1330 1430 DSS-53 MADRID 0930-1030 EDT, Tue 1 Sep 245/0915-1115 1000 1100 DSS-36 CANBERRA 0600-0700 EDT, Wed 2 Sep 245/1745-2015 1830 2000 DSS-54 MADRID 1430-1600 EDT, Wed 2 Sep SNAPSHOT summary: ----------------- UTC 2026:244:03:19:01 (Sep 1) f_ACE 2.07e+01 F_CRM 5.12e+08 Kp 3.0 R km 105428D OBT 2026:244:03:16:12 CTUVCDU 16193919 OBC s/w NRML FMT1_NORM CPEstat NORM OBT 904619772.24 ONLVCDU 16193912 OBC Errs 0 OBSID 30440 EPState SUN SIM TTpos -46728 HETG Angle 77.59 PCADMODE NPNT RA 352.222 Bus V 27.11 SIM FApos -715 LETG Angle 75.71 PCONTROL NPNT Dec 5.246 Bus I 22.63 AOFSTAR GUID Roll 155.998 ACA Object FFFSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang -17.94 Yaw Rate 0.15 HRC-S HV OFF ACA CCD Temp -5.1 Dith Zang -6.00 Pitch Rate 0.40 SHLD HV 8.0 ACA Int Time 1.698 Roll Rate -0.45 EVT RT 5864 AOACSTAT OK FSS SunBeta NSUN SHLD RT 4079 FSS Alfa -49.57 Batt 1 SOC 100.00% Avg HRMA Temp 74.54 FSS Beta -49.72 Batt 2 SOC 100.00% A -15 V -14.45 Avg OBA Temp 89.33 SA Resolv 162.19 Batt 3 SOC 100.00% A +15 V 14.53 OBA Tavg Fault NFLT SA Sun Pres ILLM A +5 V 4.84 OBA Trng Fault NFLT +Y SA Amps 11.60 A +24 V 0.00 HRMA power 94.40 SCS 128 ACT -Y SA Amps 10.83 OBA power 0.00 SCS 129 ACT +Y SA Temp 110.51 SCS 130 ACT -Y SA Temp 110.20 ACIS Stat7-0 6 Roll Mom. 1.627 SCS 131 ACT Cold Rad -127. Pitch Mom. 10.719 SCS 132 ACT Ephin Temp 0.0000 Warm Rad -82.0 Yaw Mom. 3.804 SCS 133 ACT EIO Temp 0.0000 RadMon ENAB PMTANKP 151.731 SCS 107 INAC EPH temp 126.31 UpLCmdAcc 51111 IRU2G2 curr 117.60 M Unload MON Cmd Rej A 236 IRU2G1 curr 93.60 Roll Bias 2.0763 TSC Move STOP Prop. line 03 168.93 Pitch Bias -4.2636 FA Move STOP CTX A PWR 36.32 Prop. line 04 168.93 Yaw Bias -1.8563 OTG Move DISA CTX A Volts 3.52 UTC 2026:244:13:05:01 (Sep 1) f_ACE 1.68e+01 F_CRM 5.12e+08 Kp 1.3 R km 105428D Currently scheduled FPSI, OTG : ACIS-S NONE Estimated Kp : 2.7 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 2.29e+01 GOES-R P4 flux, in RADMON P4GM units : 4.08e-02 GOES-R P7 flux, in RADMON P41GM units : 8.39e-03 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 1.57e+03 Orbit Start Time : 2026:177:08:08:58 Geocentric Distance (km), Orbit Leg : 140711 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.8248e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 1.8248e+04 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 8.1745e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 5.1173e+08