Dec_18_2000_M515.txt Shift M515 Start at 2000:353:21:00:00 GMT = 2000 Dec 18 4:00pm EST End 2000 Dec 18 6:00pm EST SOT shift report 2000-12-18 M515 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_18_2000_M515.txt SOT Lead Robert Cameron SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running DEC1800B load. Seq # ObsID Target start SI Grat RA dec roll ------------------------------------------------------------------------------------------- 500175 01998 CRAB NEBULA 2000:353:20:28:00.000 ACIS-S NONE 83.6068 22.0276 295.42 ---- 61813 CAL-ER 2000:354:03:43:51.443 -- -- 66.6000 10.3000 306.31 900066 02409 CDFS 2000:354:04:12:01.443 ACIS-I NONE 53.0865 -27.8055 318.99 ORBITAL EVENTS: 2000:352:17:05:37.341 188 ORBIT PERIGEE 2000:354:00:48:59.568 189 ORBIT APOGEE 2000:355:08:32:52.930 189 ORBIT PERIGEE 2000:356:16:16:48.972 190 ORBIT APOGEE 2000:358:00:00:22.954 190 ORBIT PERIGEE 2000:359:07:44:41.289 191 ORBIT APOGEE 2000:360:15:29:02.597 191 ORBIT PERIGEE 2000:361:23:12:52.752 192 ORBIT APOGEE 2000:363:06:57:59.277 192 ORBIT PERIGEE 2000:364:14:41:20.624 193 ORBIT APOGEE 2000:365:22:26:03.214 193 ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 353:2100 AOS DSS-24 (Goldstone 34m) 353:2115 1998 LOS DSS-24 (Goldstone 34m) 353:2215 End of shift 353:2300 NOTES/ISSUES/PROBLEMS --------------------- 1) Chandra snapshot: UTC 2000:353:22:15:02 (Dec18) f_ACE 7.74e+02 F_ACE 5.94e+06 Kp 2.7 R km 141591A OBT 2000:353:22:14:02 CTUVCDU 2125567 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 93564842.81 ONLVCDU 2125552 OBC Errs 0 OBSID 1998 EPState SUN SIM TTpos 72439 HETG Angle 79.84 PCADMODE NPNT RA 83.607 Bus V 29.93 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec 22.028 Bus I 30.51 AOFSTAR GUID Roll 295.419 ACA Object FFFSSSSS Dither DISA HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang 0.00 Yaw Rate 0.07 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 0.00 Pitch Rate 0.13 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.09 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -49.63 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -49.78 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 50.50 SA Resolv 176.69 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 14.49 RadMon ENAB HRMA power 87.20 SCS 128 ACT -Y SA Amps 15.26 EPHIN Geom LARG OBA power 141.10 SCS 129 ACT +Y SA Temp 116.58 E150 2.4 SCS 130 ACT -Y SA Temp 116.58 E300 0.1 Roll Mom. 2.850 E1300 0.0 Pitch Mom. -11.719 UpL Cmd Acc 45209 EPH A-Leak 0.2320 P4GM 0.1 Yaw Mom. -4.938 Cmd Rej A 211 EPH B-Leak 0.0480 P41GM 0.0 Current Data: UTC 2000:353:22:42:01 (Dec18) f_ACE 9.52e+02 F_ACE 7.07e+06 Kp 2.7 R km 141798A Currently scheduled FPSI, OTG : ACIS-S NONE Costello Kp : 2.67 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 9.52e+02 Orbit Start Time : 2000:352:17:09:01 Geocentric Distance (km), Orbit Leg : 141777 A CRM Region : 1 (Solar_Wind) External Proton Flux (p/cm^2-s-sr-MeV) : 9.52000000000e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 9.52000000000e+02 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.65663940338e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.00427100000e+07 2) Status at 353:2215: Observed Expected -------- -------- PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 3 3 RA = 83.6068 deg 83.6068 DEC = 22.0276 deg 22.0276 ROLL = 295.42 deg 295.42 Format = 2 2 OBSID = 1998 1998 SIM FA = -467 -468 SIM TSC = 72439 72440 HETGA = 79.84 deg (OUT) OUT HETGB = 80.59 deg (OUT) OUT LETGA = 79.09 deg (OUT) OUT LETGB = 78.34 deg (OUT) OUT HRC IM PS = ON, 42, 53 SP PS = OFF, 0, 0 Shield 1 HV = OFF, 0 Shield 2 HV = ON, 8 Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 3000 ACIS FP Temp = -119.9 DEA Pwr = 31.9 DPA Pwr = 39.9 Science State = Science Active 3) Radiation --------- Chandra Radiation environment is medium and rising, because of a C7 solar flare and associated Coronal Mass Ejection (CME), starting at 11:12 UTC today. ACE 2 hr fluence is 4.7e6 vs. threshold 3.6e8. CRM-based orbital fluence is 7.1e6 vs. threshold 1.0e9. Chandra is in the solar wind. 4) Quick Look data review (OK unless noted): There were no new quick look data in this shift. 5) A meeting was held at the OCC this afternoon at 2:30pm, to discuss SOT and FOT response to a situation where ACIS was not correctly protected from radiation, going into the belts. A series of faults were considered, ranging from command load problems to Chandra electrical or mechanical problems. Initial problem responses were identified for each fault path. Actions were identified, to verify the correct products or analyses to support each problem response.