Nov_09_2000_M476.txt Shift M476 Start at 2000:314:18:00:00 GMT = 2000 Nov 09 1:00pm EDT End 2000 Nov 09 3:00pm EDT SOT shift report 2000-11-09 M476 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_09_2000_M476.txt SOT Lead Mark Freeman SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - A RADMON trip and SCS 107 execution was noted by the OC's and confirmed by the FOT last night during the 314:0010 COMM pass. This was caused by a large (S3 class) radiation storm which hit us at about 313:2330 or so. EPHIN rates were highly elevated above the trip levels during the 314:0010 pass and remained high at the 314:0945 pass. ACE low energy proton rates continue to be very high (~20,000), and the GOES proton rates are high as well. E1300, P4GM, and P41GM are all now well above their respective RADMON trigger levels (see note 2). Current plan is to leave Chandra safed to radiation for the time being, and pick up the load again upon the next perigee exit if the radiation environment has dropped to reasonable levels. Some small cleanup work and an interim load will be sent during a COMM pass between now and that time. New loads will be created and reviewed today, and a review of the overall situation will be held tomorrow at 11am EST. Seq # ObsID It Target start time SI Grat RA dec roll slew ---------------------------------------------------------------------------------------------------------- 600135 01578 00 NGC4111 2000:314:21:38:51.963 12.9 ACIS-S NONE 181.7645 43.0445 43.69 83.33 400108 01030 00 SMC X-1 2000:315:02:04:00.000 6.0 ACIS-S NONE 19.2044 -73.4513 334.97 155.50 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 ---- T_E75 CAL-ER 2000:317:23:54:20.292 8.0 -- -- 356.3400 -59.4900 311.35 -0.01 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 314:1800 AOS, DSS-54 Madrid 314:1845 Status: still under SCS 107 run (see note 1,2) LOS End of shift 314:2000 NOTES/ISSUES/PROBLEMS --------------------- 1) Status during this COMM: UTC 2000:314:18:57:01 (Nov 9) f_ACE 1.82e+04 F_ACE 2.01e+09 Kp 1.0 R km 132020D OBT 2000:314:18:56:32 CTUVCDU 5706879 OBC s/w NRML FMT2_SSR CPEstat NORM OBT 90183392.26 ONLVCDU 5706864 OBC Errs 0 OBSID 2077 EPState SUN SIM TTpos -99615 HETG Angle 79.84 PCADMODE NPNT RA 63.962 Bus V 30.24 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec -55.602 Bus I 30.26 AOFSTAR GUID Roll 19.769 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc NNNTTTTT Dith Yang -0.35 Yaw Rate 0.05 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -6.86 Pitch Rate -0.12 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.10 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -1.45 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -15.85 Batt 2 SOC 100.00% ACIS Stat7-0 66 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 14.30 RADMON DISA HRMA power 32.70 SCS 128 INAC -Y SA Amps 15.26 EPHIN Geom SMAL OBA power 53.70 SCS 129 INAC +Y SA Temp 115.12 E150 52097.6 SCS 130 INAC -Y SA Temp 114.81 E300 3491.3 Roll Mom. -3.174 E1300 617.9 Pitch Mom. -12.460 UpL Cmd Acc 42407 EPH A-Leak 1.0200 P4GM 4932.2 Yaw Mom. 2.404 Cmd Rej A 25 EPH B-Leak 0.2040 P41GM 90.1 2) Current Radiation situation and EPHIN levels: SIM TTpos -99615 <-- Translation table in HRC-S pos., correct for SCS107 run RADMON DISA <-- indicates SCS 107 has run EPHIN Geom SMAL E150 52097.6 E300 3491.3 E1300 617.9 <-- Trigger level 10.0 P4GM 4932.2 <-- Trigger level 300.0 P41GM 90.1 <-- Trigger level 8.47 The current radiation levels exceed the triggers by better than an order of magnitude. GOES and ACE rates are currently very high also, and are either flat or decreasing very slowly. 3) Radiation telecon (per Bill Podgorski's report this morning): * Radiation and particularly EPHIN levels are too high now for a resumption of operations with NGC4111 tonight. * Will re-plan for intercepting load at first observation after perigee passage, which is B2 2236+35, starting at 315:2359. Load review tonight. Plan to uplink tomorrow during day. * Will have a review telecon to assess radiation situation prior to uplink. Details will be published by Dan Shropshire via E-mail. * Real-time cleanup CAPS need to be run: - Enable SCS 107 - Enable HRC SCS's