SOT Shift Report 2004-10-29 L1926 Duration: 29 Oct 2004 08:30 EDT - 29 Oct 2004 09:30 EDT 29 Oct 2004 12:30 GMT - 29 Oct 2004 13:30 GMT SOT Lead: Tom Aldcroft ======================================== Plan ---- Continue with OCT2504C load: pass through perigee, then continue the spectroscopic study of the Crab nebula; take another look at the AGN 3C382 to study its Iron K-alpha line profile; then do a calibration observation of G21.5-09: T_E22 CAL-ER (59987) 2004:303:10:52:36.353 10.2 -- -- GG_22 CAL-ER (59986) 2004:303:15:25:46.353 3.6 -- -- T_X23 CAL-ER (59985) 2004:303:21:59:14.617 18.0 -- -- 05285 The Crab Nebula 2004:304:03:24:08.971 10.0 ACIS-S HETG I6151 CAL-ER (59984) 2004:304:06:52:27.331 0.0 -- -- 06151 3C382 2004:304:07:19:59.195 65.0 ACIS-S HETG 05158 G21.5-09[I3,-120 2004:305:01:56:09.795 10.0 ACIS-I NONE Events ------ No comm this shift Notes from 9am meeting ---------------------- Ops: In Radiation Zone NO Current SI ACIS-I Grating HETG Observation ID 59987 Target Altitude 55.9 kkm Desc Radmon Disable 306/02:07z Next Radiation Zone 303/13:43z to 304/01:21z MP: - It was decided yesterday to heed the new model predictions of unacceptable high EPHIN temperatures for the NOV0104 load. The load was replanned based on a threshold of 97 degF (using the new model), and will be released this morning. The OCT3104 load picks up at 305:0120. - Load review expected this afternoon, probably at 3pm. Eng: - Telemetry glitch on battery full charge status flag. Looked at 2nd channel data but this showed the same glitch, so a double bit telemetry error is suspected. - Toggling of the 1PIN1AT ACIS PSMC temperature near the yellow limit seen again; ACIS team is investigating. - EPHIN 27V rail voltage anomaly still in progress. The G detector high voltage did recover to its nominal value, but due to another warming attitude it has subsequently dropped again. - Reinhold Mueller-Mellin has stated that there is no expected danger to the electronics from repeated current limit events. However, lack of the proper high voltage bias will accelerate the degradation of the detectors due to lithium drifting away from the depletion regions. Mike continues to investigate. - FDB conditionally approved uplink of final OBC patch in the long effort to accomodate degradation or failure of EPHIN. This patch allows RadMon to logically ignore EPHIN. Radiation: - Solar activity remains low. ACE and GOES rates are very low. There is a possibility of some geomagnetic activity over the weekend due to a weak full halo CME which, if front-sided, is expected to arrive on Sunday. Solar Activity Forecast: Solar activity is expected to continue at the low level. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled throughout the interval. DSops: - Possible commanding issue with the grating observation 4624 based on quicklook data. Snapshot -------- Apart from EPHIN telemetry, the snapshot matches expected configuration: UTC 2004:303:11:42:04 (Oct29) f_ACE 1.29e+01 F_CRM 2.82e+08 Kp 2.0 R km 69320D OBT 2004:303:11:38:38 CTUVCDU 7962623 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 215437118.06 ONLVCDU 7962608 OBC Errs 0 OBSID 59987 EPState SUN SIM TTpos -99616 HETG Angle 5.96 PCADMODE NPNT RA 83.630 Bus V 29.77 SIM FApos -467 LETG Angle 77.59 PCONTROL NPNT Dec 22.002 Bus I 25.20 AOFSTAR GUID Roll 91.334 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang 7.29 Yaw Rate 0.13 HRC-S HV OFF ACA CCD Temp -15.6 Dith Zang -0.85 Pitch Rate -0.10 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.13 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.38 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta -42.49 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 52.57 SA Resolv 132.47 Batt 3 SOC 100.00% Cold Rad -127.9 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 12.37 RadMon DISA HRMA power 75.00 SCS 128 ACT -Y SA Amps 12.56 EPHIN Geom SMAL OBA power 8.10 SCS 129 ACT +Y SA Temp 115.85 E150 50.3 SCS 130 ACT -Y SA Temp 116.95 E300 2.6 Roll Mom. 10.406 SCS 107 INAC E1300 3.9 Pitch Mom. 0.822 UpL Cmd Acc 18018 EPH A-Leak 1.0200 P4GM 0.0 Yaw Mom. -3.178 Cmd Rej A 115 EPH B-Leak 1.0200 P41GM 0.0 EPH temp 98.62 Gyro 1 Curr 1 9.60 Roll Bias -0.7661 EPH 27I 11.35 M Unload MON Gyro 1 Curr 2 9.60 Pitch Bias -1.9710 TSC Move STOP Gyro 2 Curr 1 103.20 Yaw Bias -1.0622 CTX B PWR 36.50 FA Move STOP Gyro 2 Curr 2 100.80 CTX B Volts 3.54 OTG Move DISA Explanation Current Data: UTC 2004:303:13:25:02 (Oct29) f_ACE 1.66e+01 F_CRM 2.82e+08 Kp 1.3 R km 60220D Currently scheduled FPSI, OTG : HRC-S HETG Estimated Kp : 1.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 1.66e+01 GOES-10 P2 flux, in RADMON P4GM units : 0.00 GOES-12 P2 flux, in RADMON P4GM units : 0.00 GOES-10 P5 flux, in RADMON P41GM units : 0.01 GOES-12 P5 flux, in RADMON P41GM units : 0.02 Orbit Start Time : 2004:301:03:59:01 Geocentric Distance (km), Orbit Leg : 60312 D CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 4.77393000000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 3.05011283125e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 2.82461012091e+08