See http://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L6441. Start at 069:13:00 GMT PLAN ---- Perform recovery from Bright Star Hold. NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 3 Supports completed in the last 24 hours (total time: 5.9 hours) 4 SSR dumps 1 CAP: 893A, 069/0606z, DISA SCS 29 (Post Bright Star Hold) At 2017:068:17:00:42 Chandra transitioned to Bright Star Hold following the maneuver to obsid 50255. The transition was nominal, science instruments were safed properly, and all telemetry appears as expected. Recovery is planned during the 10:05am DSS-65 pass. Radiation: Solar activity is expected to be very low on days one, two, and three (10 Mar, 11 Mar, 12 Mar). MP: The science mission recovery will target the 9:45pm DSS-54 pass for uplink. Eng: Based on initial examination of telemetry there was an error on the final attitude after the maneuver to obsid 50522 sufficient to cause star acquisition to fail. The cause appears to be a gyro bias excursion. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 20023 Abell 1914 ACIS-I NONE 18903 J1012-3124 ACIS-S NONE 19737 W1322-0328 ACIS-S NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 069/1405-1620 1505 1605 DSS-65 MADRID 1005-1105 EST, Fri 10 Mar 070/0145-0400 0245 0345 DSS-54 MADRID 2145-2245 EST, Fri 10 Mar 070/1030-1245 1130 1230 DSS-15 GOLDSTONE 0630-0730 EST, Sat 11 Mar 070/1945-2200 2045 2145 DSS-54 MADRID 1545-1645 EST, Sat 11 Mar 071/0230-0445 0330 0430 DSS-24 GOLDSTONE 2230-2330 EST, Sat 11 Mar 071/1030-1245 1130 1230 DSS-36 CANBERRA 0730-0830 EDT, Sun 12 Mar 071/1855-2110 1955 2055 DSS-24 GOLDSTONE 1555-1655 EDT, Sun 12 Mar SNAPSHOT summary: ---------------- UTC 2017:069:11:59:01 (Mar10) f_ACE 2.11e+01 F_CRM 0.00e+00 Kp 4.3 R km 107905A OBT 2017:069:11:55:49 CTUVCDU 7806719 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 605534149.08 ONLVCDU 7806704 OBC Errs 0 OBSID 50255 EPState SUN SIM TTpos -99616 HETG Angle 78.34 PCADMODE NPNT RA 41.345 Bus V 28.36 SIM FApos -535 LETG Angle 76.84 PCONTROL NPNT Dec -42.445 Bus I 24.94 AOFSTAR BRIT Roll 244.955 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc RTTTTTTT Dith Yang 7.94 Yaw Rate 0.03 HRC-S HV ON ACA CCD Temp -12.1 Dith Zang 6.98 Pitch Rate -0.26 SHLD HV 0.0 ACA Int Time 0.705 Roll Rate 0.01 EVT RT 0 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa -1.27 Batt 1 SOC 100.00% Avg HRMA Temp 71.56 FSS Beta 30.65 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 62.55 SA Resolv 59.39 Batt 3 SOC 100.00% Cold Rad -127.9 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -89.3 OBA Trng Fault NFLT +Y SA Amps 12.37 RadMon DISA HRMA power 29.90 SCS 128 INAC -Y SA Amps 12.37 EPHIN Geom VLD OBA power 43.20 SCS 129 INAC +Y SA Temp 116.58 E150 7618560.0 SCS 130 INAC -Y SA Temp 116.95 E300 20672.0 Roll Mom. 3.990 SCS 131 DISA E1300 1.0 Pitch Mom. 6.107 SCS 132 DISA EPH A-Leak 1.0200 UpLCmdAcc 32813 Yaw Mom. 5.316 SCS 133 DISA EPH B-Leak 0.0000 Cmd Rej A 141 PMTANKP 116.560 SCS 107 DISA EPH temp 147.16 Gyro 2 Curr 1 100.80 EPH 27I 6.95 M Unload MON Gyro 2 Curr 2 122.40 Roll Bias -0.1654 TSC Move STOP Prop. line 03 168.93 Pitch Bias -1.8921 CTX A PWR 36.38 FA Move STOP Prop. line 04 131.94 Yaw Bias -1.1455 CTX A Volts 3.52 OTG Move DISA UTC 2017:069:13:46:01 (Mar10) f_ACE 1.98e+01 F_CRM 0.00e+00 Kp 3.3 R km 113888A Currently scheduled FPSI, OTG : HRC-S NONE Estimated Kp : 3.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 1.98e+01 GOES-13 P2 flux, in RADMON P4GM units : 0.32 GOES-15 P2 flux, in RADMON P4GM units : 0.24 GOES-13 P5 flux, in RADMON P41GM units : 0.20 GOES-15 P5 flux, in RADMON P41GM units : 0.18 GOES-13 E > 2.0 MeV flux (p/cm^2-s-sr) : 10800.0 Orbit Start Time : 2017:068:21:04:01 Geocentric Distance (km), Orbit Leg : 113784 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.1383e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.0000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.8150e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.0000e+00