SOT Shift Report Shift M242 Duration: 21 Mar 2000 14:00 EST - 21 Mar 2000 17:00 EST 21 Mar 2000 19:00 GMT - 21 Mar 2000 22:00 GMT SOT Lead: Tom Aldcroft Spacecraft/Aspect: FOT/Science Liason: HRC: ACIS: ======================================== Plan ---- Continue MAR1900 load: 00829 3C 123 2000:081:19:05:47.694 47.5 ACIS-S NONE <- Current 00544 A2111 2000:082:09:23:57.924 10.0 ACIS-I NONE 00822 SBSG 1542+541 2000:082:12:34:41.422 4.9 ACIS-S NONE T_86C CAL-ER 2000:082:14:21:10.295 6.5 -- -- Events ------ 20:14 AOS on DSS-27 20:35 Limit on CFC counts exceeded 21:00 LOS Notes/Issues/Problems --------------------- Rino Giordano dropped by to discuss a trend in ACIS cold radiator temperatures. He is seeing an increase in the (peak - mean) radiator temperature, from about 2 degrees in ~December to 14 degrees now. This is a seasonal effect due to heating from the Earth near perigee. In the next few months the effect could get worse. Rino is only looking at engineering temps, and suggested the SOT examine temperatures in science data. Perhaps ACIS and MTA are already doing this. Snapshot -------- Looks good for ACIS-S obs. of 3C123 at RA,Dec,Roll = 69.2475, 29.6811, 280.89: UTC 2000:081:20:33:03 (Tue Mar 21) f_ACE 6.39e+01 F_ACE 5.93e+06 R km 141733D OBT 2000:081:20:32:37 CTUVCDU 11054675 OBC s/w NRML FMT2_EPS CPEstat OBT 70057957.04 ONLVCDU 11054664 OBC Errs 0 OBSID 829 EPState SUN SIM TTpos 75624 HETG Angle 80.2 PCADMODE NPNT RA 69.250 Bus V 30.87 SIM FApos -467 LETG Angle 79.1 PCONTROL NPNT Dec 29.681 Bus I 27.22 AOFSTAR GUID Roll 280.887 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTN Dith Yang 3.42 Yaw Rate -0.12 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang -5.55 Pitch Rate 0.02 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.16 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.29 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta 19.19 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 50.89 SA Resolv 70.67 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 12.56 HRMA power 31.50 -Y SA Amps 13.72 EPHIN Geom LARG OBA power 81.40 +Y SA Temp 112.66 E1300 0 -Y SA Temp 113.28 P4GM 0 Roll Mom. 0.409 SCS 128 P41GM 0 Pitch Mom. -3.935 SCS 129 UpL Cmd Acc 47943 A-Leak 0.3560 Yaw Mom. -0.185 SCS 130 Cmd Rej A 155 B-Leak 0.0560