Apr_23_2002_M1006.txt Shift M1006 Start at 2002:113:16:00:00 GMT = 2002 Apr 23 12 noon EDT End 2002 Apr 23 1:30 pm EDT SOT shift report 2002-04-23 M1006 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_23_2002_M1006.txt SOT Lead Mark Freeman SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Loads still stopped due to high radiation. In radiation zone, before perigee passage. Radiation Discussion: First commanding in APR2302B is at 113:2130. Plan is to uplink and activate at start of today's 4:35EDT pass (113:2035-2135), after assessment of radiation situation. Current radiation situation: - EPHIN levels not meaningful due to perigee passage - GOES rates continue to decline. Levels currently predict EPHIN rates below trigger levels. - Shock passed at about 113:0200, soft protons decreasing slowly since then. Flux now down to ~35k 113:1700). APR23 load includes ACIS/HETG and HRC observations which reduce level of radiation exposure for ACIS, should be OK to start observations if trends continue. Rob will assess fluence expected for next orbit and present at 4:30 telecon. TELECON: Radiation telecon at 4:30EDT today (Tuesday, April 23). on 405-244-5060 pin 1165# Assess radiation and give decision on APR2302B start. Seq # ObsID It Target start time SI Grat RA dec roll slew ---------------------------------------------------------------------------------------------------------- APR2302B: Replan load 400247 03492 00 1 RX J170930.2-263927 2002:113:21:58:00.000 5.0 ACIS-S NONE 257.3908 -26.6727 81.29 0.33 ---- I2526 00 CAL-ER 2002:113:23:58:16.495 0.0 -- -- 114.0000 -64.0000 257.83 96.49 ORBITAL EVENTS: 2002:112:06:24:25.119 374 EAPOGEE ORBIT APOGEE 2002:113:07:21:45.158 374 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2002:113:14:08:51.015 374 EPERIGEE ORBIT PERIGEE 2002:113:18:35:45.158 375 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2002:114:21:52:03.208 375 EAPOGEE ORBIT APOGEE 2002:116:05:03:02.104 375 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2002:116:05:35:14.788 375 EPERIGEE ORBIT PERIGEE 2002:116:09:51:02.104 376 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2002:117:13:19:04.582 376 EAPOGEE ORBIT APOGEE 2002:118:14:17:48.416 376 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2002:118:21:02:08.143 376 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 113:1600 AOS (DSS-54) 1600 Status at COMM is as expected. 1659 3476* LOS 1700 End of shift 113:1715 *not observing due to SCS 107 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at last COMM: UTC 2002:113:16:59:46 (Apr23) f_ACE 3.73e+04 F_CRM 0.00e+00 Kp 3.3 R km 40163A OBT 2002:113:16:58:43 CTUVCDU 16607615 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 135968323.35 ONLVCDU 16607600 OBC Errs 0 OBSID 3476 EPState SUN SIM TTpos -99616 HETG Angle 79.46 PCADMODE NPNT RA 257.390 Bus V 29.77 SIM FApos -535 LETG Angle 77.96 PCONTROL NPNT Dec -26.674 Bus I 36.35 AOFSTAR GUID Roll 81.619 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc NNNTTTTT Dith Yang -6.76 Yaw Rate -0.03 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang -2.00 Pitch Rate -0.08 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.14 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.65 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -44.76 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.97 SA Resolv 132.32 Batt 3 SOC 100.00% Cold Rad -125.5 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 17.62 RadMon DISA HRMA power 68.10 SCS 128 INAC -Y SA Amps 18.21 EPHIN Geom SMAL OBA power 103.20 SCS 129 INAC +Y SA Temp 111.74 E150 380878.0 SCS 130 INAC -Y SA Temp 112.97 E300 4000.0 Roll Mom. 13.257 SCS 107 DISA E1300 108.2 Pitch Mom. -13.795 UpL Cmd Acc 7959 EPH A-Leak 1.0200 P4GM 3447.2 Yaw Mom. -2.470 Cmd Rej A 239 EPH B-Leak 0.2560 P41GM 4.7 2) Current Radiation Data: UTC 2002:113:16:59:46 (Apr23) f_ACE 3.73e+04 F_CRM 0.00e+00 Kp 3.3 R km 40163A Currently scheduled FPSI, OTG : HRC-S NONE Costello Kp : 3.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 3.73e+04 GOES-8 P2 flux, in RADMON P4GM units : 0.14 GOES-10 P2 flux, in RADMON P4GM units : 0.14 GOES-8 P5 flux, in RADMON P41GM units : 0.49 GOES-10 P5 flux, in RADMON P41GM units : 0.36 Orbit Start Time : 2002:113:14:14:01 Geocentric Distance (km), Orbit Leg : 40040 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.52030000000e+05 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.92279000000e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.00000000000e+00