See http://cxc.harvard.edu/mta/SOT_reports/sot-shift.html
Shift L7022.
Start at 285:13:00 GMT
PLAN
----
Safe mode recovery.
NOTES/ISSUES/PROBLEMS
---------------------
From the 9am status meeting:
3 Supports completed (total time: 12.9 hours)
4 SSR dumps
CAP 1447, 285/0106z, Power On IRU-B, FSSA-B, and SPE-A
Radiation:
Solar activity is expected to be very low
on days one, two, and three (12 Oct, 13 Oct, 14 Oct).
MP:
Not preparing any loads due to the safe mode.
Eng:
Root cause of the safe mode transition was identified.
An excursion from IRU-2, Gyro-2 caused false rate and
momentum data to be computed by the OBC. The change in
momentum was large enough to trip the momentum monitor.
Safe mode recovery plan includes assessing the status
on IRU-2, Gyro-2. If acceptable, recover to OBC control
using IRU-2. Maneuver to cooling attitude but do not
resume science. Prepare required products and swap to
mixed IRU-1, Gyro-2 and IRU-2, Gyro-1 configuration.
Resume science.
GOT:
No issues.
Quick look data:
----------------
None
Next Comms:
-----------
Support (GMT) BOT EOT Station Site Track time (local)
--------------- ---- ---- --------- --------- -------------------------
285/0905-1455 1005 1440 DSS-26 GOLDSTONE 0605-1040 EDT, Fri 12 Oct
285/1740-2255 1840 2240 DSS-65 MADRID 1440-1840 EDT, Fri 12 Oct
286/0115-0540 0215 0525 DSS-26 GOLDSTONE 2215-0125 EDT, Fri 12 Oct
286/1115-1330 1215 1315 DSS-65 MADRID 0815-0915 EDT, Sat 13 Oct
286/2345-0200 0045 0145 DSS-65 MADRID 2045-2145 EDT, Sat 13 Oct
287/1105-1320 1205 1305 DSS-24 GOLDSTONE 0805-0905 EDT, Sun 14 Oct
287/2355-0210 0055 0155 DSS-65 MADRID 2055-2155 EDT, Sun 14 Oct
SNAPSHOT summary:
----------------
UTC 2018:285:12:30:01 (Oct12) f_ACE 2.16e+01 F_CRM 2.75e+08 Kp 1.0 R km 41234D
OBT 2018:285:12:29:32 CTUVCDU 654368 OBC s/w SAFE FMT5_NORM CPEstat SAFE
OBT 655734572.43 ONLVCDU 2384032 OBC Errs 0
OBSID 0 EPState SUN
SIM TTpos -99616 HETG Angle 77.96 PCADMODE STBY RA 242.571 Bus V 28.20
SIM FApos -535 LETG Angle 76.46 PCONTROL AUTO Dec -62.297 Bus I 26.46
AOFSTAR BRIT Roll 274.825
ACA Object SSSSSSSS Dither DISA HRC-I HV ON
ACA ImFunc SSSSTTTT Dith Yang 0.00 Yaw Rate -0.54 HRC-S HV OFF
ACA CCD Temp 34.1 Dith Zang 0.00 Pitch Rate -0.25 SHLD HV 0.0
ACA Int Time 0.705 Roll Rate 0.68 EVT RT 0
AOACSTAT OK FSS SunBeta SUN SHLD RT 0
FSS Alfa -0.45 Batt 1 SOC 100.00%
Avg HRMA Temp 72.42 FSS Beta -20.15 Batt 2 SOC 100.00% ACIS Stat7-0 66
Avg OBA Temp 69.22 SA Resolv 109.89 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 13.14 RadMon DISA
HRMA power 39.50 SCS 128 DISA -Y SA Amps 13.33
OBA power 70.20 SCS 129 DISA +Y SA Temp 115.49
SCS 130 DISA -Y SA Temp 115.12
Roll Mom. 0.024 SCS 131 DISA
Pitch Mom. -0.044 SCS 132 DISA UpLCmdAcc 4109
Yaw Mom. -0.105 SCS 133 DISA Cmd Rej A 136
PMTANKP 118.159 SCS 107 DISA EPH temp 166.95
Gyro 2 Curr 1 96.00 M Unload MON
Gyro 2 Curr 2 108.00 Roll Bias -0.6765 TSC Move STOP
Prop. line 03 158.73 Pitch Bias 0.2458 CTX B PWR 36.84 FA Move STOP
Prop. line 04 148.52 Yaw Bias 0.5425 CTX B Volts 3.56 OTG Move DISA
UTC 2018:285:12:30:01 (Oct12) f_ACE 2.16e+01 F_CRM 2.75e+08 Kp 1.0 R km 41234D
Currently scheduled FPSI, OTG : HRC-S NONE
Estimated Kp : 1.0
ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 2.16e+01
GOES-13 P2 flux, in RADMON P4GM units : 0.12
GOES-15 P2 flux, in RADMON P4GM units : 0.03
GOES-13 P5 flux, in RADMON P41GM units : 0.24
GOES-15 P5 flux, in RADMON P41GM units : 0.01
GOES-13 E > 2.0 MeV flux (p/cm^2-s-sr) : 13600.0
Orbit Start Time : 2018:283:00:04:01
Geocentric Distance (km), Orbit Leg : 41363 D
CRM Region : 3 (Magnetosphere)
External Proton Flux (p/cm^2-s-sr-MeV) : 2.5179e+04
Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.0000e+00
External Proton Orbital Fluence (p/cm^2-sr-MeV) : 3.1667e+09
Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 2.7657e+08