See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L8422. Start at 224:13:00 GMT At 2022:223:13:49:23 Chandra went into a bright star hold. The root cause was quickly confirmed to be the high ionizing radiation environment near perigee. Spacecraft was recovered in the 224/0130z pass. A mitigation has been put in place for fututre loads to use gyro hold near perigee to avoid this condition. PLAN ---- For the weekend (Tenative): 2022:226:12:48:52 Grating: NONE 2022:226:13:08:42 RADMON Enable 2022:226:13:26:35 Obsid: 27248 SI: ACIS-S (11 ksec) Target: IGRJ12391m1612_ 2022:226:17:01:39 Obsid: 23934 SI: ACIS-I (5 ksec) Target: GDH11 2022:226:18:41:09 Obsid: 24046 SI: ACIS-I (5 ksec) Target: GDHInt33 2022:226:20:19:39 Obsid: 24047 SI: ACIS-I (5 ksec) Target: GDHInt33 2022:226:21:58:49 Obsid: 23935 SI: ACIS-I (5 ksec) Target: GDH11 2022:226:23:39:02 Obsid: 24048 SI: ACIS-I (5 ksec) Target: GDHInt33 NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 2 Supports Completed in the last 24 hours (Total time: 4.6 hours) 2 SSR dumps CAP's / Procedures Run: CAP # | Time | Title / Description / Notes [893B] | 223/2005z | DISA SCS 29 [1624] | 224/0142z | Restart Aspect Camera Processing in OBC (Post Bright Star Hold) [1625] | 224/0213z | Manual Maneuver for Cooling (Post BSH) [675A] | 224/0241z | Re-ENAB SCS 107 (Post BSH) Radiation: Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (12 Aug, 13 Aug, 14 Aug). MP: Return to science, Aug1322 loads in work (possibly out today). Intercept is realively early tomorrow. ENG: Spacecraft is back in normal point mode and in cooling attitude. Spacecraft is recovered. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 27254 RXC J2014.8-2430 ACIS-S NONE 23938 GDH11 ACIS-I NONE 23937 GDH11 ACIS-I NONE 27251 NGC 5005 ACIS-S NONE 26474 DQ Tau ACIS-I NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 224/1355-1610 1455 1555 DSS-56 MADRID 1055-1155 EDT, Fri 12 Aug 224/1700-2030 1745 2015 DSS-65 MADRID 1345-1615 EDT, Fri 12 Aug 225/0130-0345 0230 0330 DSS-26 GOLDSTONE 2230-2330 EDT, Fri 12 Aug 225/0940-1155 1040 1140 DSS-24 GOLDSTONE 0640-0740 EDT, Sat 13 Aug 225/1925-2140 2025 2125 DSS-65 MADRID 1625-1725 EDT, Sat 13 Aug 226/0115-0330 0215 0315 DSS-26 GOLDSTONE 2215-2315 EDT, Sat 13 Aug 226/0840-1025 0925 1010 DSS-34 CANBERRA 0525-0610 EDT, Sun 14 Aug 226/1715-1930 1815 1915 DSS-56 MADRID 1415-1515 EDT, Sun 14 Aug 226/2355-0210 0055 0155 DSS-56 MADRID 2055-2155 EDT, Sun 14 Aug 227/1015-1230 1115 1215 DSS-34 CANBERRA 0715-0815 EDT, Mon 15 Aug 227/1745-2000 1845 1945 DSS-56 MADRID 1445-1545 EDT, Mon 15 Aug SNAPSHOT summary: ----------------- UTC 2022:224:02:45:02 (Aug12) f_ACE 1.54e+01 F_CRM 0.00e+00 Kp 2.0 R km 114196A OBT 2022:224:02:42:28 CTUVCDU 4142079 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 776659348.40 ONLVCDU 4142072 OBC Errs 0 OBSID 45339 EPState SUN SIM TTpos -99616 HETG Angle 5.59 PCADMODE NPNT RA 303.002 Bus V 27.89 SIM FApos -535 LETG Angle 76.09 PCONTROL NPNT Dec -31.000 Bus I 23.66 AOFSTAR GUID Roll 309.139 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 3.42 Yaw Rate 0.27 HRC-S HV OFF ACA CCD Temp -5.4 Dith Zang -3.31 Pitch Rate 0.22 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.24 EVT RT 5354 AOACSTAT OK FSS SunBeta NSUN SHLD RT 0 FSS Alfa -49.57 Batt 1 SOC 100.00% Avg HRMA Temp 73.52 FSS Beta -49.72 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 67.65 SA Resolv 156.64 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 11.79 A +24 V 0.00 HRMA power 94.40 SCS 128 INAC -Y SA Amps 11.60 OBA power 70.20 SCS 129 INAC +Y SA Temp 111.43 SCS 130 INAC -Y SA Temp 111.43 ACIS Stat7-0 6 Roll Mom. -5.837 SCS 131 DISA Cold Rad -118. Pitch Mom. 8.292 SCS 132 DISA Ephin Temp 0.0000 Warm Rad -79.6 Yaw Mom. -14.099 SCS 133 DISA EIO Temp 0.0000 RadMon DISA PMTANKP 137.343 SCS 107 DISA EPH temp 152.81 UpLCmdAcc 42187 IRU2G2 curr 117.60 M Unload MON Cmd Rej A 159 IRU2G1 curr 91.20 Roll Bias 1.0633 TSC Move STOP Prop. line 03 134.13 Pitch Bias -3.1290 FA Move STOP CTX B PWR 36.69 Prop. line 04 115.08 Yaw Bias -1.6832 OTG Move DISA CTX B Volts 3.54 UTC 2022:224:13:00:02 (Aug12) f_ACE 2.19e+01 F_CRM 0.00e+00 Kp 0.7 R km 145061A Currently scheduled FPSI, OTG : HRC-S HETG Estimated Kp : 0.7 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 2.19e+01 GOES-R P4 flux, in RADMON P4GM units : 0.060 GOES-R P7 flux, in RADMON P41GM units : 0.013 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 2280.0 Orbit Start Time : 0.005 Geocentric Distance (km), Orbit Leg : 145032 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 2.2933e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.0000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.9029e+04 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.0000e+00