See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L9898. Start at 239:13:00 GMT PLAN ---- Finish: Obsid: 30409 SI: ACIS-S, NONE Target: ClG J0242-2132 Then: 2026:239:18:23:30 Obsid: 31998 SI: ACIS-S (12 ksec) Target: SDSS J022226.11 2026:239:22:31:14 Obsid: 31061 SI: HRC-I (5 ksec) Target: HD 27406 2026:240:00:29:07 Obsid: 32516 SI: ACIS-S (15 ksec) Target: WISE J2246-0526 2026:240:05:11:04 Obsid: 32510 SI: ACIS-S (22 ksec) Target: MASTER J0146+48 2026:240:11:37:18 Grating: HETG 2026:240:11:39:21 RADMON Disable NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 3 Supports Completed in the last 24 hours (Total time: 6 hours) 3 SSR dumps Loads good through: 2026:242:22:06:33 CAP's - 1804C, 238/2033z, HRC-S Restart On DOY 2025:297:00:03, the HRC-S power supply was discovered to have turned off during HVPS auto ramp-up for obsid 31954. Prior to this, the HRC-S microchannel plates and hybrid preamplifiers experienced extreme total event count rates for approximately 1 minute. As part of returning the HRC-S to operations, the HRC-S will observe 2CXO J225932.9+24550 for 1ks during a real time comm with BOT of 2026:238:20:30:00.000 UT. DSN DR's - M119434, DSS-54, Not able to support Chandra, Declared RED due to Antanna Drive Cabinet (ADC) issues Radiation (Solar Activity): Solar activity is likely to be moderate with a 55% chance for M-class flares and 15% chance for an X-class flare on days one, two, and three (27 Aug, 28 Aug, 29 Aug). Radiation (Geophysical Activity): The geomagnetic field is expected to be at unsettled to minor storm levels on day one (27 Aug), active to major storm levels on day two (28 Aug) and unsettled to major storm levels on day three (29 Aug). Protons have a slight chance of crossing threshold on days one, two, and three (27 Aug, 28 Aug, 29 Aug). MP: Aug3126A load review today by 5pm. ENG: No issues. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- None Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 239/1125-1325 1210 1310 DSS-54 MADRID 0810-0910 EDT, Thu 27 Aug 240/0155-0355 0240 0340 DSS-23 GOLDSTONE 2240-2340 EDT, Thu 27 Aug 240/0915-1115 1000 1100 DSS-36 CANBERRA 0600-0700 EDT, Fri 28 Aug 240/1740-1940 1825 1925 DSS-36 CANBERRA 1425-1525 EDT, Fri 28 Aug SNAPSHOT summary: ----------------- UTC 2026:239:03:59:01 (Aug27) f_ACE 2.72e+01 F_CRM 5.12e+08 Kp 1.3 R km 105428D OBT 2026:239:03:55:57 CTUVCDU 14517375 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 904190157.87 ONLVCDU 14517368 OBC Errs 0 OBSID 30409 EPState SUN SIM TTpos 75623 HETG Angle 77.59 PCADMODE NPNT RA 40.661 Bus V 27.26 SIM FApos -467 LETG Angle 75.71 PCONTROL NPNT Dec -21.562 Bus I 21.86 AOFSTAR GUID Roll 90.976 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 5.07 Yaw Rate 0.17 HRC-S HV OFF ACA CCD Temp -5.4 Dith Zang 4.82 Pitch Rate 0.20 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.04 EVT RT 4844 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa -0.36 Batt 1 SOC 100.00% Avg HRMA Temp 74.43 FSS Beta -26.96 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 86.75 SA Resolv 116.18 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 11.02 A +24 V 0.00 HRMA power 33.00 SCS 128 ACT -Y SA Amps 10.44 OBA power 0.00 SCS 129 INAC +Y SA Temp 110.51 SCS 130 ACT -Y SA Temp 109.89 ACIS Stat7-0 6 Roll Mom. -5.923 SCS 131 ACT Cold Rad -118. Pitch Mom. -6.355 SCS 132 INAC Ephin Temp 0.0000 Warm Rad -77.1 Yaw Mom. 5.774 SCS 133 ACT EIO Temp 0.0000 RadMon ENAB PMTANKP 151.731 SCS 107 INAC EPH temp 126.31 UpLCmdAcc 39648 IRU2G2 curr 120.00 M Unload MON Cmd Rej A 252 IRU2G1 curr 93.60 Roll Bias 2.0738 TSC Move STOP Prop. line 03 162.13 Pitch Bias -4.2556 FA Move STOP CTX B PWR 36.96 Prop. line 04 140.72 Yaw Bias -1.8580 OTG Move DISA CTX B Volts 3.54 UTC 2026:239:12:57:02 (Aug27) f_ACE 2.19e+01 F_CRM 5.12e+08 Kp 3.0 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 : 6.05e-02 GOES-R P7 flux, in RADMON P41GM units : 2.79e-03 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 1.13e+03 Orbit Start Time : 2026:177:08:08:58 Geocentric Distance (km), Orbit Leg : 142589 D 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