SOT Shift Report 2003-12-02 M1594 Duration: 2 Dec 2003 14:45 EST - 2 Dec 2003 15:45 EST 2 Dec 2003 19:45 GMT - 2 Dec 2003 20:45 GMT SOT Lead: Tom Aldcroft ======================================== Plan ---- No load running due to autonomous SCS107 trip Events ------ 19:45 AOS on DSS-24 20:45 LOS Notes/Issues/Problems --------------------- - SCS107 ran autonomously at 336:17:31:10 due to high EPHIN rates (likely P4) - Current attitude good until at least day 340. No problems with EPHIN heating. Momentum good only through ~6pm Eastern tomorrow night. Need either momentum maneuver or maneuver to better attitude to cool thrusters and do dump. - Radiation: Speculate that region 508 is responsible. This is a very broad event, similar to one previous event which took ~1.5 days from peak to get acceptably low - Replan to pick up after next exit from perigee. No time-critical/constrained observations remain in this week. Maneuver-only load will be prepared to control momentum. Will attempt to uplink at 8:35pm pass tonight. - EPHIN rates (cts/cm^2-s-sr) OBSERVED RADMON limit ------------ ------------- E1300 (electrons, 2.64 - 6.18 MeV): 0.1 10.0 P4GM (protons, 5.0 - 8.3 MeV): 398.4 300.0 P41GM (protons, 41 - 53 MeV): 0.0 8.47 - ACE 130-214 keV proton fluences (p/cm2-sr-MeV) (scaled P6) and Costello predicted activity index OBSERVED SOT alert ------------ ------------- 2-hour Fluence: 3E8 3.6E+8 Kp: 1.3 6.0 Snapshot -------- Snapshot reflects SCS107 run: UTC 2003:336:19:54:05 (Dec 2) f_ACE 3.36e+04 F_CRM 0.00e+00 Kp 1.3 R km 128263A OBT 2003:336:19:53:40 CTUVCDU 13578367 OBC s/w NRML FMT1_EPS CPEstat NORM OBT 186782020.17 ONLVCDU 13578352 OBC Errs 11 OBSID 3764 EPState SUN SIM TTpos -99616 HETG Angle 79.46 PCADMODE NPNT RA 78.221 Bus V 29.30 SIM FApos -990 LETG Angle 4.09 PCONTROL NPNT Dec -16.228 Bus I 29.50 AOFSTAR GUID Roll 15.559 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 9.81 Yaw Rate -0.22 HRC-S HV ON ACA CCD Temp -15.6 Dith Zang 9.54 Pitch Rate -0.27 OBSMode OBSV ACA Int Time 1.698 Roll Rate 0.08 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -1.70 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -50.02 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 51.37 SA Resolv 140.75 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 14.49 RadMon DISA HRMA power 55.90 SCS 128 INAC -Y SA Amps 14.49 EPHIN Geom LARG OBA power 88.30 SCS 129 INAC +Y SA Temp 117.68 E150 464.4 SCS 130 INAC -Y SA Temp 119.51 E300 18.7 Roll Mom. 14.469 SCS 107 DISA E1300 0.1 Pitch Mom. -11.619 UpL Cmd Acc 15838 EPH A-Leak 1.0200 P4GM 398.4 Yaw Mom. 0.627 Cmd Rej A 55 EPH B-Leak 0.7160 P41GM 0.0 Gyro 1 Curr 1 9.60 Roll Bias -0.5504 Gyro 1 Curr 2 9.60 Pitch Bias -1.8781 Gyro 2 Curr 1 103.20 Yaw Bias -0.8978 Gyro 2 Curr 2 98.40 Explanation Current Data: UTC 2003:336:19:54:05 (Dec 2) f_ACE 3.36e+04 F_CRM 0.00e+00 Kp 1.3 R km 128263A Currently scheduled FPSI, OTG : HRC-S LETG Estimated Kp : 1.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 3.36e+04 GOES-10 P2 flux, in RADMON P4GM units : 0.06 GOES-12 P2 flux, in RADMON P4GM units : 0.91 GOES-10 P5 flux, in RADMON P41GM units : 0.01 GOES-12 P5 flux, in RADMON P41GM units : 0.02 Orbit Start Time : 2003:335:15:19:00 Geocentric Distance (km), Orbit Leg : 128253 A CRM Region : 1 (Solar_Wind) External Proton Flux (p/cm^2-s-sr-MeV) : 3.35520000000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 7.69771036080e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.00000000000e+00