Oct_29_2003_L1560.txt Shift L1560 Start at 2003:302 14:00 UTC = 2003 Oct 29 9:00 am EST End at 2003 Oct 29 11:00 am EST SOT shift report 2003-10-29 L1560 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Oct_29_2003_L1560.txt SOT Lead Robert Cameron SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - No load running because of high radiation. Summary from 9am EST radiation telecon: Radiation rates remain very high after the X17 solar flare and associated CME. FOT MP will produce products today, to resume science after next perigee exit. There will be another radiation telecon at 5pm EST today to re-assess radiation and determine if a later time for science resumption is needed. A long-duration M4 flare occured several hours after the X17 flare, which might produce a CME. The discussion of the ACIS CTI measurement on the descending leg of this orbit produced the following conclusions: 1. the load being planned by FOT MP would allow an SCS107 run by RADMON trip due to the ACIS CTI measurement, without disturbing the possibility of resuming science at perigee exit. This is because the load is segmented such that the first maneuver and ACIS Stop Science commands are in the first SCS, and the next maneuver is immediately before science resumption, in the next SCS. Assuming the first maneuver executes correctly (before SCS107 and RADMON are enabled), then a SCS107 run from RADMON at the time of the ACIS CTI would stop all mission SCSs, but the remaining mission SCSs for the load could be re-enabled without problem. 2. Nonetheless, there will be a broader radiation team review and approval process for the planned ACIS CTI measurement, to consider the risk of running SCS107 against the benefit of the CTI measurement. The final go/nogo for the ACIS CTI will occur at 5am EST tomorrow. The next radiation telecon will be 5pmEST today, 405, 244 5060, 1165#. Seq # ObsID It Target start time SI Grat RA dec roll ----------------------------------------------------------------------------------------------------- ORBITAL EVENTS: 2003:302:13:59:15.020 584 EAPOGEE ORBIT APOGEE 2003:303:21:43:31.304 584 EPERIGEE ORBIT PERIGEE 2003:305:05:26:58.729 585 EAPOGEE ORBIT APOGEE 2003:306:13:10:34.451 585 EPERIGEE ORBIT PERIGEE 2003:307:20:54:45.086 586 EAPOGEE ORBIT APOGEE 2003:309:04:38:07.561 586 EPERIGEE ORBIT PERIGEE 2003:310:12:22:40.962 587 EAPOGEE ORBIT APOGEE 2003:311:20:06:32.771 587 EPERIGEE ORBIT PERIGEE 2003:313:03:50:58.858 588 EAPOGEE ORBIT APOGEE 2003:314:11:35:29.516 588 EPERIGEE ORBIT PERIGEE 2003:315:19:19:29.654 589 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 302:1400 60497 (load stopped) End of shift 302:1600 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at 302:1550: UTC 2003:302:13:15:03 (Oct29) f_ACE 5.40e+05 F_CRM 7.60e+08 Kp 1.3 R km 129354A OBT 2003:302:13:14:02 CTUVCDU 2020991 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 183820442.45 ONLVCDU 2020976 OBC Errs 0 OBSID 60497 EPState SUN SIM TTpos -99616 HETG Angle 79.46 PCADMODE NPNT RA 11.001 Bus V 29.77 SIM FApos -715 LETG Angle 77.59 PCONTROL NPNT Dec 34.999 Bus I 26.21 AOFSTAR GUID Roll 225.728 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTNN Dith Yang 1.55 Yaw Rate 0.12 HRC-S HV OFF ACA CCD Temp -15.6 Dith Zang -5.60 Pitch Rate -0.11 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.05 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -49.64 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -49.79 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 51.05 SA Resolv 151.12 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 RadMon DISA HRMA power 64.40 SCS 128 INAC -Y SA Amps 13.14 EPHIN Geom SMAL OBA power 113.70 SCS 129 INAC +Y SA Temp 115.49 E150 76097.6 SCS 130 INAC -Y SA Temp 116.58 E300 2327.5 Roll Mom. 0.809 SCS 107 DISA E1300 235.8 Pitch Mom. -7.546 UpL Cmd Acc 27497 EPH A-Leak 1.0200 P4GM 3360.4 Yaw Mom. 2.132 Cmd Rej A 245 EPH B-Leak 0.2960 P41GM 34.1 Gyro 1 Curr 1 7.20 Roll Bias -0.5215 Gyro 1 Curr 2 9.60 Pitch Bias -1.8730 Gyro 2 Curr 1 103.20 Yaw Bias -0.8785 Gyro 2 Curr 2 98.40 Current Data: UTC 2003:302:15:47:01 (Oct29) f_ACE 5.14e+05 F_CRM 7.60e+08 Kp 2.7 R km 129110D Currently scheduled FPSI, OTG : HRC-S NONE Estimated Kp : 2.67 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 5.14e+05 GOES-10 P2 flux, in RADMON P4GM units : 3.65 GOES-12 P2 flux, in RADMON P4GM units : 4.27 GOES-10 P5 flux, in RADMON P41GM units : 1.98 GOES-12 P5 flux, in RADMON P41GM units : 2.41 Orbit Start Time : 2003:301:06:19:02 Geocentric Distance (km), Orbit Leg : 129126 D CRM Region : 1 (Solar_Wind) External Proton Flux (p/cm^2-s-sr-MeV) : 5.14000000000e+05 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 3.65625038975e+10 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 7.59524985000e+08 2) Radiation The ACE radiation environment is very high and variable, with EPAM P3 rates above 10e6 p/second. The GOES proton radiation flux is elevated and variable. ACE 2 hr fluence is 6.5e9 vs. threshold 3.6e8. CRM-based orbital fluence is 7.6e8 vs. threshold 3.0e9. Chandra is in the solar wind. 3) Quick Look data review (OK unless noted): Seq # ObsID Constr. Target Start Time SI Grat Comment --------------------------------------------------------------------------------------- There were no new quick-look datasets in this shift.