Feb_22_2000_L214.txt Shift L214 Start at 2000:053:12:30:00 GMT = 2000 Feb 22 7:30am EST End 2000 Feb 22 10:30am EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_22_2000_L214.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running load FEB20D, doing ACIS CTI before rad zone entry. SOT COVERAGE: DAY BOT EOT SOT Lead 053 1250 1350 1445 1500 DSS-24 WAP 053 2300 0000 0130 0145 DSS-54 - 054 1010 1110 1240 1255 DSS-24 WAP 054 1935 2000 2200 2210 DSS-27 RAC 055 0215 0315 0400 0415 DSS-54 - 055 1100 1200 1400 1415 DSS-24 WAP 055 2145 2245 0000 0015 DSS-24 RAC 056 0630 0710 0820 0830 DSS-66 - 056 1150 1230 1430 1440 DSS-46 WAP 056 2320 0020 0130 0145 DSS-54 - 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 LOS 053:1230 62160 State at last pass was nominal (see note 1) ACE 2 hr fluence 2.0E+6 (ACE Flux about 290) AOS DSS-24 (Goldstone) 053:1350 Chandra status AOS was nominal (see note 2) Start new CTI run 053:1418 62159 LOS DSS-24 053:1445 End of shift 053:1530 NOTES/ISSUES/PROBLEMS --------------------- 1) State at last COMM: UTC 2000:053:07:01:02 (Tue Feb 22) f_ACE 2.43e+02 F_ACE 7.10e+08 R km 113276D OBT 2000:053:06:59:56 CTUVCDU 1423615 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 67589996.96 ONLVCDU 1423600 OBC Errs 0 OBSID 370 EPState SUN SIM TTpos 75623 HETG Angle 80.6 PCADMODE NPNT RA 40.654 Bus V 30.40 SIM FApos -467 LETG Angle 79.1 PCONTROL NPNT Dec -0.004 Bus I 31.78 AOFSTAR GUID Roll 281.443 ACA Object FFFSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang 7.03 Yaw Rate 0.27 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -6.05 Pitch Rate -0.21 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.17 Door OP ACT AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.31 Batt 1 SOC 100.00% Avg HRMA Temp 70.56 FSS Beta 23.56 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 51.13 SA Resolv 66.25 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 15.07 HRMA power 64.50 -Y SA Amps 16.25 EPHIN Geom LARG OBA power 67.40 +Y SA Temp 114.81 E1300 0 -Y SA Temp 115.12 P4GM 0 Roll Mom. 12.189 SCS 128 P41GM 0 Pitch Mom. -3.677 SCS 129 UpL Cmd Acc 5092 A-Leak 0.3600 Yaw Mom. 1.281 SCS 130 Cmd Rej A 214 B-Leak 0.0600 Expected: RA, Dec, Roll (degrees): 40.65148, -0.00277, 281.44279 2) Chandra's state at 053:1350 was: WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 0 0 RA = 120.000000 deg 120.00000 DEC = 54.999999 deg 55.00000 ROLL = 225.524035 deg 225.52405 Format = 2 2 OBSID = 62160 62160 SIM FA = -467 -468 SIM TSC = -99616 -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 = 0.4080 B-leak = 0.0640 ACE 2 HR Proton Fluence (130-214KeV) = 2.0E+6 LT 3.6E+8 EPHIN Geom = LARG E1300 = 3 LT 1318.52 (RADMON P4GM = 3 LT 118.08 Triggers) P41GM = 0 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 = -119.7 DEA Pwr = 51.0 DPA Pwr = 41.0 3) Radiation: ACE orbital flux in 130-214 keV proton channel is 229. Next orbit has 44hrs 36mins of ACIS in focus, so accumulated fluence would be 3.7E+7, well below orbital trigger level of 1E+9. For reference, to reach ACE 2 hour fluence trigger of 3.6E+8 we would need an average flux of 50000 (5E+4). To reach an orbital fluence of 1E+9 over about 45 hours of ACIS exposure in an orbit we would need an AVERAGE flux of about 6200 (6.2E3) over the entire orbit. Solar Weather reports indicate no major events upcoming as of now (9am Tuesday). 4) Notes from 9:00am meeting: Operations (Darrel Wicker): - 3 supports, 3 dumps yesterday, all OK. - All 3 segments of FEB20D are onboard, but will be overwritten by revised load (see Mission Planning). - CAP 563A run to dump CPE warmstart count, which was 1, same as last time. Mission Planning (Ken Gage): - FEB20 loads have been regenerated due to the omission of some eclipse commands on day 56 (Friday). A diff was done with prior load showing only the added eclipse commands. Revised load segment to be uplinked today after Roger's review of load diff file. Load is FEB20E. - Review of FEB27 load to be at 1pm today. SOT (Bill Podgorski): - Discussed reduction of radiation as measured by ACE. Spacecraft Engineering (Leon McKendrick): - Eclipse season starts Friday with first short eclipse at about 056:1342 UT (Friday). Total of 13 eclipses this season. Briefing to be held by Wallace Jackson Thursday at 10:00am. - Bill Peterson has a patch for short eclipse preparations which needs to be uplinked before the first eclipse (Friday). CAP576 written to uplink the patch later today.