See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L9749. Start at 090:13:00 GMT PLAN ---- Finish: Obsid: 32268 SI: ACIS-I (17 ksec) Target: Perseus cluster Then: 2026:090:18:04:29 Obsid: 32262 SI: ACIS-S (10 ksec) Target: NGC4496A 2026:090:21:33:34 Obsid: 32269 SI: ACIS-I (17 ksec) Target: Perseus cluster 2026:091:03:12:37 Obsid: 32263 SI: ACIS-S (10 ksec) Target: NGC4496A 2026:091:06:41:41 Obsid: 32270 SI: ACIS-I (17 ksec) Target: Perseus cluster 2026:091:12:15:43 Obsid: 32264 SI: ACIS-S (10 ksec) Target: NGC4496A 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: 2026:095:00:02:16 Radiation (Solar Activity): Solar activity is likely to be moderate with a slight chance for an X-class flare on days one, two, and three (31 Mar, 01 Apr, 02 Apr). Radiation (Geophysical Activity): The geomagnetic field is expected to be at quiet to major storm levels on day one (31 Mar), quiet to minor storm levels on day two (01 Apr) and quiet to unsettled levels on day three (02 Apr). Protons have a chance of crossing threshold on days one and two (31 Mar, 01 Apr) and have a chance of crossing threshold on day three (02 Apr). MP: A DDT was approved yesterday which will go into the Apr06 loads ENG: Monthly tests will be tomorrow GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 30335 Perseus cluster W ACIS-I NONE 29913 SDSS J164818.07+415550.2 ACIS-S NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 090/1940-2140 2025 2125 DSS-54 MADRID 1625-1725 EDT, Tue 31 Mar 091/0135-0335 0220 0320 DSS-56 MADRID 2220-2320 EDT, Tue 31 Mar 091/0925-1125 1010 1110 DSS-24 GOLDSTONE 0610-0710 EDT, Wed 1 Apr 091/1755-1955 1840 1940 DSS-36 CANBERRA 1440-1540 EDT, Wed 1 Apr SNAPSHOT summary: ----------------- UTC 2026:090:11:18:02 (Mar31) f_ACE 6.31e+01 F_CRM 5.79e+08 Kp 4.7 R km 95192A OBT 2026:090:11:15:21 CTUVCDU 14713471 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 891342921.67 ONLVCDU 14713464 OBC Errs 0 OBSID 29656 EPState SUN SIM TTpos 75624 HETG Angle 77.59 PCADMODE NPNT RA 187.910 Bus V 26.79 SIM FApos -467 LETG Angle 76.09 PCONTROL NPNT Dec 3.953 Bus I 24.43 AOFSTAR GUID Roll 191.016 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 1.69 Yaw Rate 0.02 HRC-S HV OFF ACA CCD Temp -6.2 Dith Zang 15.95 Pitch Rate -0.13 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.07 EVT RT 5099 AOACSTAT OK FSS SunBeta NSUN SHLD RT 0 FSS Alfa -49.57 Batt 1 SOC 100.00% Avg HRMA Temp 74.00 FSS Beta -49.72 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 82.57 SA Resolv 171.64 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 12.18 A +24 V 0.00 HRMA power 72.50 SCS 128 ACT -Y SA Amps 11.98 OBA power 35.10 SCS 129 ACT +Y SA Temp 113.28 SCS 130 INAC -Y SA Temp 112.35 ACIS Stat7-0 6 Roll Mom. -1.065 SCS 131 ACT Cold Rad -120. Pitch Mom. 7.852 SCS 132 ACT Ephin Temp 0.0000 Warm Rad -79.6 Yaw Mom. 6.053 SCS 133 INAC EIO Temp 0.0000 RadMon ENAB PMTANKP 150.132 SCS 107 INAC EPH temp 178.27 UpLCmdAcc 16321 IRU2G2 curr 120.00 M Unload MON Cmd Rej A 204 IRU2G1 curr 96.00 Roll Bias 2.0356 TSC Move STOP Prop. line 03 127.54 Pitch Bias -4.2077 FA Move STOP CTX A PWR 36.32 Prop. line 04 127.54 Yaw Bias -1.8658 OTG Move DISA CTX A Volts 3.52 UTC 2026:090:13:02:02 (Mar31) f_ACE 4.64e+01 F_CRM 5.79e+08 Kp 4.7 R km 103744A Currently scheduled FPSI, OTG : HRC-S HETG Estimated Kp : 1.0 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 3.60e+01 GOES-R P4 flux, in RADMON P4GM units : 6.02e-02 GOES-R P7 flux, in RADMON P41GM units : 1.11e-02 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 4.55e+02 Orbit Start Time : 2026:087:10:10:14 Geocentric Distance (km), Orbit Leg : 103621 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.8000e+01 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.0000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.5047e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 5.7932e+08