Feb_25_2000_L217.txt Shift L217 Start at 2000:056:12:00:00 GMT = 2000 Feb 25 7:00am EST End 2000 Feb 25 11:00am EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_25_2000_L215.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running load FEB20E, In radiation zone near perigee. First eclipse of spring season at about 1344. ORBITAL EVENTS: 2000:051:05:59:57.865 74 EPERIGEE ORBIT PERIGEE 2000:052:13:42:50.521 75 EAPOGEE ORBIT APOGEE 2000:053:21:27:19.841 75 EPERIGEE ORBIT PERIGEE 2000:055:05:10:25.703 76 EAPOGEE ORBIT APOGEE 2000:056:12:54:02.057 76 EPERIGEE ORBIT PERIGEE 2000:057:20:37:50.176 77 EAPOGEE ORBIT APOGEE 2000:059:04:21:33.402 77 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift AOS 056:1200 State at last pass was nominal (see note 1) AOS DSS-46 (Canberra) 056:1233 Chandra status at shift start was nominal (note 2) 056:1240 Enter eclipse 056:1346 Exit Eclipse (see note 3) 056:1359 LOS DSS-46 056:1430 End of shift 056:1600 NOTES/ISSUES/PROBLEMS --------------------- 1) State at last COMM: UTC 2000:056:08:20:01 (Fri Feb 25) f_ACE 2.88e+02 F_ACE 0.00e+00 R km 56657D OBT 2000:056:08:19:31 CTUVCDU 2453759 OBC s/w NRML FMT2_NORM CPEstat OBT 67853971.18 ONLVCDU 2453744 OBC Errs 0 OBSID 62153 EPState SUN SIM TTpos -99615 HETG Angle 80.6 PCADMODE NPNT RA 245.861 Bus V 30.55 SIM FApos -535 LETG Angle 79.1 PCONTROL NPNT Dec -13.054 Bus I 27.73 AOFSTAR GUID Roll 80.453 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTNNN Dith Yang 4.88 Yaw Rate -0.02 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -6.54 Pitch Rate -0.05 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.06 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.27 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -0.07 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.97 SA Resolv 89.74 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 13.14 HRMA power 25.80 -Y SA Amps 14.30 EPHIN Geom LARG OBA power 145.50 +Y SA Temp 116.22 E1300 56 -Y SA Temp 116.22 P4GM 63872 Roll Mom. 5.442 SCS 128 P41GM 0 Pitch Mom. 2.299 SCS 129 UpL Cmd Acc 9520 A-Leak 0.3560 Yaw Mom. 0.085 SCS 130 Cmd Rej A 58 B-Leak 0.0560 Expected RA, Dec, Roll (degrees): 245.86280, -13.05559, 80.45354 2) Chandra's state at 056:1240 was: WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 0 0 RA = 245.862788 deg 245.86280 DEC = -13.055591 deg -13.05559 ROLL = 80.453552 deg 80.45354 Format = 2 2 OBSID = 62153 62153 SIM FA = -535 -536 SIM TSC = -99615 -99616 HETGA = 80.58 deg (OUT) OUT HETGB = 81.33 deg (OUT) OUT LETGA = 80.21 deg (OUT) OUT LETGB = 79.08 deg (OUT) OUT EPHIN A-leak = 0.6000 B-leak = 0.1000 ACE Proton Flux = 253 (2 hr avg in 130-214 keV proton channel) Fluence (130-214KeV) = 1.8E+6 LT 3.6E+8 Radiation Level OK EPHIN Geom = LARG E1300 = In belts LT 1318.52 (RADMON P4GM = LT 118.08 Triggers) P41GM = LT 100.00 HRC SP PS = OFF IM PS = ON IM Top Step = 42 IM Bot Step = 53 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 = -112.1 Cold Radiator = -120.7 DEA Pwr = 36.6 DPA Pwr = 40.4 3) Eclipse was a short eclipse. There are a total of 13 eclipses this season, 5 classified as short and the rest (8) medium. Performance was nominal. Max bus voltage on re-entry into sunlight was about 33.4 volts. Various OBA zones reached the 55 deg F setpoint and are now trending down after reset of setpoints to 50 deg F nominal value. (OBA setpoints are raised prior to and during eclipse to increase current draw and help keep bus voltage rise after re-entering sunlight to under 35 V) 4) Notes from 9:00am meeting: Operations (Darrel Wicker): - 3 supports, 3 dumps yesterday, all OK. - Onboard loads good thru day 58 - Results from CAP 563A, ran yesterday, were that the CPE warm start colunt was still 1. Mission Planning (Dan Shropshire): - FEB27 load approved and ready - MAR05 load in work, plan to complete by Monday (Feb 28) before OFLS release 8 install (1st string) on Tuesday (Feb 29). Spacecraft Engineering: - Gyro telecon on Monday, last one since performance of gyros seems in line with expectations from other programs and not a great concern. FOT will continue to watch carefully (Jeff Shirer). - Eclipse nominal (Wallace) SOT (Bill Podgorski): - ACE proton flux levels down from yesterday (250). ASCDSOPS(Joy Nichols): - 3 quick looks available (see below) 4) Quick Look data review: OBSID Target Time Comment ----- ------ -------------- ------- 00406 NGC 4579 2000:054:23:42 ACIS-S, Looks OK 00957 HUBBLE DEEP FIELD 2000:054:06:20 ACIS-I, Looks OK 00836 PKS B1345+125 2000:055:01:01 ACIS-S, Looks OK