Nov_10_2000_L477.txt Shift L477 Start at 2000:315:12:30:00 GMT = 2000 Nov 10 7:30am EDT End 2000 Nov 10 1:00pm EDT SOT shift report 2000-11-10 L477 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_10_2000_L477.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - We are still in SI-SAFE condition due to RADMON trip yesterday. Radiation levels still high as we head towards perigee at 315:16:28. ACE levels went up at about 315:0600 to a flux of over 700,000 - contaminated by electrons. As of 315:1500 they had gone down to about 130,000, with a slow decrease being observed. This is in response to the CME released at 2330 of Nov 8, which accompanied the solar storm. EPHIN rates were still elevated (P4GM > 3000) at 315:0400 pass when we were still well out of the rad belts. P4GM was still about 3000 during last pass at 315:1300 but we were near the belts. We decided to abort yesterday's intercept plan and to work out a new one. A telecon will be held at 11am EST to discuss the situation. Results of this discussion will be reported later. Planned schedule - not being run: Seq # ObsID It Target start time SI Grat RA dec roll slew ---------------------------------------------------------------------------------------------------------- 900073 02246 00 GSGP4X:091 2000:315:04:12:00.000 12.0 ACIS-S NONE 14.4822 -27.8904 322.59 46.36 ---- T_E74 CAL-ER 2000:315:08:14:05.238 8.1 -- -- 356.3400 -59.4900 313.43 -0.00 ---- T_X75 CAL-ER 2000:315:20:34:47.707 10.0 -- -- 356.3400 -59.4900 312.98 -0.00 700381 02191 00 B2 2236+35 2000:315:23:59:21.785 10.0 ACIS-S NONE 339.6028 35.3431 271.79 100.81 500144 01967 00 SNR 1987A 2000:316:03:48:45.264 100.0 ACIS-S NONE 83.8604 -69.2905 35.32 163.04 200015 00017 00 AU MIC 2000:317:08:07:25.145 54.4 ACIS-S HETG 311.2660 -31.3244 282.27 74.24 ORBITAL EVENTS: 2000:315:16:28:08.463 174 EPERIGEE ORBIT PERIGEE 2000:317:00:12:57.781 175 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 315:1230 AOS DSS-34 (Canberra 34m) 315:1300 State of S/C at AOS was nominal LOS DSS-34 315:1400 End of shift 315:1800 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at 315:1400(end of last COMM): UTC 2000:315:14:01:01 (Nov10) f_ACE 1.64e+05 F_ACE 6.15e+09 Kp 1.7 R km 37065D OBT 2000:315:14:00:09 CTUVCDU 5974655 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 90252009.55 ONLVCDU 5974640 OBC Errs 0 OBSID 2077 EPState SUN SIM TTpos -99615 HETG Angle 79.84 PCADMODE NPNT RA 63.960 Bus V 30.08 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec -55.602 Bus I 31.53 AOFSTAR GUID Roll 19.767 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc NNNTTTTT Dith Yang -4.71 Yaw Rate -0.36 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -5.70 Pitch Rate -0.15 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.10 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -2.31 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta -15.81 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 51.05 SA Resolv 105.84 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 14.88 RADMON DISA HRMA power 46.60 SCS 128 INAC -Y SA Amps 16.05 EPHIN Geom SMAL OBA power 78.70 SCS 129 INAC +Y SA Temp 115.49 E150 311414.6 SCS 130 INAC -Y SA Temp 115.12 E300 3275.3 Roll Mom. -0.897 E1300 185.0 Pitch Mom. -8.416 UpL Cmd Acc 42581 EPH A-Leak 1.0200 P4GM 4433.6 Yaw Mom. 1.311 Cmd Rej A 51 EPH B-Leak 0.2040 P41GM 12.8 HRC SP PS = OFF IM PS = OFF Shield 1 HV = OFF Shield 2 HV = OFF Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 0 ACIS FP Temp = -119.9 DEA Pwr = 23.5 DPA Pwr = 12.4 Science State = Science Idle 2) Notes from 9:00am meeting: Operations (Darrell): - 3 supports last 24 hrs, all 34m, incl the 315:1300 support just completed - 5 SSR dumps, all good - 2 CAPS run; CAP 329, manual momentum unload, and CAP 675, enabls SCS 107 Mission Planning (Dan/Kevin): - Waiting until 11am telecon for directions as to which loads to build for re-start of science operations - Need to build a maneuver only load to uplink at 5pm today, since current attitude will violate earth limb constraint later on tonight S/C Engineering(Jeff): - Performed manual momentum dump - Need to schedule another one since one scheduled in 11am pass will not happen (pass given up) - Several ACIS DPA ON/OFF state transitions noted in this mornings limits check. Looked at voltage and it was good. Will inform ACIS team. SOT(Bill): - Discussion of radiation situation. DSOPS(Jen): - Two quick looks (see below). GOT(Ken): - All is OK Meetings, etc. - Radiation telecon at 11am - Load review for maneuver load this afternoon - Load review for intercept load early tonight. 3) Radiation telecon notes: * Radiation and particularly EPHIN levels are still too high now for a resumption of operations tonight * Went over several options for resumption of science observations * Decision was to attempt to restart with obsid 17 (AU MIC) but about 2 hours earlier than currently planned (brings obs time to full 60KS request). * Observation 17 will start about 317:0600 or so (1am Sunday Nov12). * Need to uplink load at 316:0100 pass (Saturday night at 8pm EST) * Another telecon scheduled 316:0545 (7:45pm EST Saturday night) to evaluate radiation * Dan Shropshire will send out details via E-mail 4) Quick look data: Seq # ObsID It Target start time SI Grat Comment ---------------------------------------------------------------------------------------------------------- 900075 02248 00 GSGP4X:114 2000:313:09:14:01.755 12.2 ACIS-S NONE 400106 01028 00 SMC X-1 2000:313:13:05:39.670 6.0 ACIS-S NONE