May_23_2002_M1036.txt Shift M1036 Start at 2002:143:19:30:00 UTC = 2002 May 23 3:30pm EDT End 2002 May 23 5:30pm EDT SOT shift report 2002-05-23 M1036 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/May_23_2002_M1036.txt SOT Lead Robert Cameron SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Mission is stopped because of high radiation. We are watching radiation to decide to resume science (ACIS-I observations of Sgr A*) either before or after next perigee. Seq # ObsID It Constr. Target Start Time SI Grat RA Dec Roll Slew --------------------------------------------------------------------------------------------------------------- ORBITAL EVENTS: 2002:142:16:15:14.218 385 EPERIGEE ORBIT PERIGEE 2002:143:23:58:55.728 386 EAPOGEE ORBIT APOGEE 2002:145:07:42:09.384 386 EPERIGEE ORBIT PERIGEE 2002:146:15:26:04.168 387 EAPOGEE ORBIT APOGEE 2002:147:23:10:16.222 387 EPERIGEE ORBIT PERIGEE 2002:149:06:53:37.956 388 EAPOGEE ORBIT APOGEE 2002:150:14:38:32.472 388 EPERIGEE ORBIT PERIGEE 2002:151:22:21:53.835 389 EAPOGEE ORBIT APOGEE 2002:153:06:06:07.830 389 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 143:1930 AOS DSS-54 (Madrid 34m) 143:2000 2943 (stopped) LOS DSS-54 (Madrid 34m) 143:2100 End of shift 143:2130 NOTES/ISSUES/PROBLEMS --------------------- 1) Chandra snapshot: UTC 2002:143:20:09:07 (May23) f_ACE 2.54e+04 F_CRM 1.87e+08 Kp 5.3 R km 134293A OBT 2002:143:20:08:45 CTUVCDU 9990015 OBC s/w NRML FMT2_EPS CPEstat NORM OBT 138571725.38 ONLVCDU 9990000 OBC Errs 0 OBSID 2943 EPState SUN SIM TTpos -99616 HETG Angle 79.46 PCADMODE NPNT RA 266.427 Bus V 30.24 SIM FApos -535 LETG Angle 77.96 PCONTROL NPNT Dec -29.028 Bus I 28.74 AOFSTAR GUID Roll 75.305 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc NNNTTTTT Dith Yang 5.49 Yaw Rate -0.13 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -7.08 Pitch Rate -0.02 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.08 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -49.63 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -49.83 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.73 SA Resolv 154.44 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 13.91 RadMon DISA HRMA power 85.90 SCS 128 INAC -Y SA Amps 14.49 EPHIN Geom LARG OBA power 24.20 SCS 129 INAC +Y SA Temp 109.58 E150 544.4 SCS 130 INAC -Y SA Temp 110.20 E300 9.5 Roll Mom. 6.184 SCS 107 DISA E1300 0.1 Pitch Mom. -2.774 UpL Cmd Acc 62288 EPH A-Leak 0.5360 P4GM 48.6 Yaw Mom. 6.263 Cmd Rej A 99 EPH B-Leak 0.1040 P41GM 0.3 Current Data: UTC 2002:143:20:09:07 (May23) f_ACE 2.54e+04 F_CRM 1.87e+08 Kp 5.3 R km 134293A Currently scheduled FPSI, OTG : HRC-S NONE Costello Kp : 5.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 2.54e+04 GOES-8 P2 flux, in RADMON P4GM units : 0.24 GOES-10 P2 flux, in RADMON P4GM units : 0.11 GOES-8 P5 flux, in RADMON P41GM units : 0.03 GOES-10 P5 flux, in RADMON P41GM units : 0.03 Orbit Start Time : 2002:142:16:19:01 Geocentric Distance (km), Orbit Leg : 134293 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 2.83796000000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 5.01224821110e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.86675513300e+08 2) Status at 143:2010 Observed Expected -------- -------- PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 0 0 RA = 266.4284 deg 266.4284 DEC = -29.0305 deg -29.0305 ROLL = 75.31 deg 75.31 Format = 2 2 OBSID = 2943 2943 SIM FA = -535 -536 SIM TSC = -99616 -99616 HETGA = 79.46 deg (OUT) OUT HETGB = 80.21 deg (OUT) OUT LETGA = 78.71 deg (OUT) OUT LETGB = 77.96 deg (OUT) OUT HRC IM PS = ON, 42, 53 SP PS = OFF, 0, 0 Shield 1 HV = OFF, 0 Shield 2 HV = OFF, 0 Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 0 ACIS FP Temp = -119.9 DEA Pwr = 25.6 DPA Pwr = 12.5 Science State = Science Idle 3) Radiation The Chandra radiation environment is high and decreasing. This radiation decline may be irregular, caused by three CME's produced by the sun on May 21 and May 22 which are overlapping in space. This variable environment will probably persist for another day or two. In view of the uncertain conditions, two alternative plans for resuming Chandra's science mission are being prepared, to resume science either tomorrow morning or after perigee on May 25. ACE 2 hr fluence is 2.6e8 vs. threshold 3.6e8. CRM-based orbital fluence is 1.9e8 vs. threshold 3.0e9. Chandra is in the magnetosheath. 4) Quick Look data review (OK unless noted): Seq # ObsID It Constr. Target Start Time SI Grat Comment ------------------------------------------------------------------------------------------ There were no new quick look data in this shift.