See http://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L6073. Start at 067:14:00 GMT PLAN ---- 2016:067:14:23:51 RADMON Enable 2016:067:14:35:44 Obsid: 17720 SI: ACIS-S (3 ksec) Target: sigma Orionis 2016:067:15:56:15 Obsid: 18304 SI: HRC-I (10 ksec) Target: PROCYON 2016:067:19:25:30 Obsid: 18212 SI: ACIS-S (17 ksec) Target: SDSSJ124829.45+ 2016:068:00:34:07 Obsid: 18272 SI: ACIS-I (20 ksec) Target: Coma cluster 2016:068:07:17:17 Obsid: 18790 SI: ACIS-S (25 ksec) Target: MWC 560 NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: Radiation: Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (07 Mar, 08 Mar, 09 Mar). MP: MAR0516A loads were approved and uplinked Friday night as the return to science. Mar2116 loads are now in work including several ToOs. Eng: Return to science was achieved on DOY 64 (Shift L6070), SCS-26 Ran on DOY 65 (Shift L6071) due to thermal build-up durng the safemode, and we swapped back to side A control on DOY 66 (Shift L6072). Details below: ------------------------ Timeline of activities Shift L6070 17:40 UT BOT Start with state of health and data play back 18:00 UT Then Disable multiple stars filter in ACA (step not currently in CAP 1377) AOMSSDS - disable multiple Disable SCS 97 CAP review at 18:15 CAP 1381: ACIS warmboot (Science run is still in progress) CAP1367 Title: Diagnostic CPE Memory Dumps (Sun_Vec_SA). Approved 1830 start CAP 1367 1833 finish CAP Disable multiple stars filter in ACA (step not currently in CAP 1377) 18:34 AOMSSDS - disable multiple stars flag in ACA 18:36 Disable SCS 97 18:37 Start CAP 1377 SOP_SAFE_NORMAL_SUN_MODE_RECOVERY 19:10 In hold at step 6 Start CAP 1381 ACIS Warmboot Step 10 of CAP appears redundant (Clear does a disable) 19:35 CAP 1381 completed back to CAP 1377 20:15 proceeding with step 8 of SOT_ (Steps 7 is finding the guide stars and verifying the command loads) 21:20 Maneuver to final attitude started. 21:45 Maneuver complete 21:50 SOP_SAFE_NORMAL_SUN_MODE_RECOVERY completed 21:50 CAP 1377 Completed 22:00 review CAP 1373 Patch CPE Sun Vector Parameter 22:10 start CAP 1373 Patch CPE Sun Vector Parameter 22:21 end CAP 1373 ---------------- DOY 65 (Shift L6071) SCS 26 run autonomous SWAP to side B thermal control At the 065:2145-2245 comm pass​ it was observed that SCS-26 had executed due to a violation of the telescope health check thermal limits. The result of this is a swap to the redundant ​side equipment. The spacecraft and observing loads still continue to operate. At the time of the comm pass the health check was toggling at the limit. SCS-26 was disabled to prevent repeated commands to the hardware to perform the swap. ​The telescope temperatures ​are elevated due to the extended time at normal sun from the Safe Mode and the maneuver profile required for a time-critical target in the observing schedule. SCS-26 was designed to handle the case of a stuck-on heater and not the environment heating seen here. ---------------- DOY 66 (Shift L6072) SWAP back to side A thermal control During the 066:1830-1930z pass a procedure to swap telescope thermal control from the redundant (B) side the the primary (A) side was completed and SCS-26 re-enabled. A review of SSR date showed that no hardware issues contributed to the SCS-26 run. The elevated temperatures that led to the SCS-26 execution were a result of heat trapped in the HRMA region due to the Safe Mode that had not fully dissipated before moving to a forward sun attitude to accommodate a time-critical target in the observing schedule. The dwell at this forward sun attitude significantly slowed the heat dissipation, allowing elevated surrounding temperatures to continue to drive the HRMA_AVE calculated temperature higher at a slow rate. The HRMA_AVE temperature peaked at 71.56F, approximately 0.02F above the trip threshold of 71.54F. A following long tail sun dwell has cooled the HRMA_AVE temperature well below the trip threshold, eliminating any risk of further healthcheck violations for the remainder of the currently running schedule. GOT: No Issues Quick look data: ---------------- None Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 067/2005-2220 2105 2205 DSS-15 GOLDSTONE 1605-1705 EST, Mon 7 Mar 068/0240-0455 0340 0440 DSS-15 GOLDSTONE 2240-2340 EST, Mon 7 Mar 068/1025-1240 1125 1225 DSS-24 GOLDSTONE 0625-0725 EST, Tue 8 Mar 068/1950-2205 2050 2150 DSS-65 MADRID 1550-1650 EST, Tue 8 Mar SNAPSHOT summary: ---------------- UTC 2016:067:13:00:02 (Mar 7) f_ACE 1.37e+02 F_CRM 0.00e+00 Kp 3.0 R km 61876A OBT 2016:067:12:56:56 CTUVCDU 1182719 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 573742616.90 ONLVCDU 1182704 OBC Errs 0 OBSID 51208 EPState SUN SIM TTpos -99616 HETG Angle 78.71 PCADMODE NPNT RA 149.876 Bus V 28.20 SIM FApos -467 LETG Angle 76.84 PCONTROL NPNT Dec -52.999 Bus I 27.48 AOFSTAR GUID Roll 338.847 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -4.96 Yaw Rate -0.28 HRC-S HV ON ACA CCD Temp -15.2 Dith Zang -3.77 Pitch Rate 0.11 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.15 EVT RT 0 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa -0.19 Batt 1 SOC 100.00% Avg HRMA Temp 71.06 FSS Beta -30.21 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 57.06 SA Resolv 120.11 Batt 3 SOC 100.00% Cold Rad -123.1 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -79.6 OBA Trng Fault NFLT +Y SA Amps 13.72 RadMon DISA HRMA power 62.90 SCS 128 ACT -Y SA Amps 13.72 EPHIN Geom VLD OBA power 70.20 SCS 129 ACT +Y SA Temp 117.68 E150 7061504.0 SCS 130 ACT -Y SA Temp 118.05 E300 106.0 Roll Mom. -1.869 SCS 131 ACT E1300 18.0 Pitch Mom. -8.288 SCS 132 ACT EPH A-Leak 1.0200 UpLCmdAcc 54711 Yaw Mom. -6.705 SCS 133 ACT EPH B-Leak 0.0000 Cmd Rej A 235 PMTANKP 132.547 SCS 107 INAC EPH temp 133.94 Gyro 2 Curr 1 100.80 EPH 27V 26.96 M Unload MON Gyro 2 Curr 2 105.60 Roll Bias -0.3014 TSC Move STOP Prop. line 03 87.74 Pitch Bias -1.7501 CTX A PWR 36.38 FA Move STOP Prop. line 04 60.34 Yaw Bias -1.0652 CTX A Volts 3.52 OTG Move DISA UTC 2016:067:15:00:01 (Mar 7) f_ACE 9.83e+01 F_CRM 1.07e+08 Kp 3.3 R km 75073A Currently scheduled FPSI, OTG : ACIS-S NONE Estimated Kp : 3.67 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 9.83e+01 GOES-13 P2 flux, in RADMON P4GM units : 0.32 GOES-15 P2 flux, in RADMON P4GM units : 0.12 GOES-13 P5 flux, in RADMON P41GM units : 0.18 GOES-15 P5 flux, in RADMON P41GM units : 0.17 GOES-13 E > 2.0 MeV flux (p/cm^2-s-sr) : 157.0 Orbit Start Time : 2016:067:07:24:01 Geocentric Distance (km), Orbit Leg : 74971 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 3.6995e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 3.6995e+04 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 2.3117e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.0690e+08