SOT shift report 2001-09-28 M799 Start at 2001:271:16:45 GMT = 2001 Sep 28 12:45 pm EDT End 1:30 pm EDT SOT Lead Mark Freeman PLAN ---- Instruments safed under high solar radiation. Next Telecon to discuss radiation situation Sat. 9/29 2:10pm EDT Current plan to restart load Sunday, Sept. 30 at 1:00 am EDT. Radiation environment continues to improve slowly. EPHIN limits are approaching the RADMON triggers, although the current rule of thumb is for them to reach 1/3 of the trigger value before restarting science. RADIATION SUMMARY Observed Limit ----------------- -------- ----- ACE EPAM P3 2 hour fluence 8.1e07 3.6e8. *ACIS* Orbital fluence (since perigee) 0 1.0e9. EPHIN rates (cts/cm^2-s-sr) at last comm. OBSERVED RADMON limit ---------------------------------------- -------- ----------- E1300 (electrons, 2.64 - 6.18 MeV): 21.2 10.0 P4GM (protons, 5.0 - 8.3 MeV): 308.3 300.0 P41GM (protons, 41 - 53 MeV): 1.9 8.47 Chandra's state was as expected with the stopped load: --------------------------------------------------------------------------- UTC 2001:271:17:16:27 (Sep28) f_ACE 1.17e+04 F_CRM 0.00e+00 Kp 3.3 R km 107685D OBT 2001:271:17:15:49 CTUVCDU 13926143 OBC s/w NRML FMT2_SSR CPEstat NORM OBT 118084549.26 ONLVCDU 13926128 OBC Errs 0 OBSID 61455 EPState SUN SIM TTpos -99616 HETG Angle 6.34 PCADMODE NPNT RA 136.998 Bus V 30.40 SIM FApos -467 LETG Angle 77.96 PCONTROL NPNT Dec 40.002 Bus I 31.02 AOFSTAR GUID Roll 57.388 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 2.74 Yaw Rate -0.13 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang -7.92 Pitch Rate -0.01 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.08 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa 0.66 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta 28.77 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 51.29 SA Resolv 59.33 Batt 3 SOC 100.00% Cold Rad -127.9 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -84.4 OBA Trng Fault NFLT +Y SA Amps 14.88 RadMon DISA HRMA power 54.70 SCS 128 INAC -Y SA Amps 15.66 EPHIN Geom SMAL OBA power 125.40 SCS 129 INAC +Y SA Temp 111.74 E150 46731.7 SCS 130 INAC -Y SA Temp 112.35 E300 705.6 Roll Mom. -4.629 SCS 107 INAC E1300 21.2 Pitch Mom. 14.153 UpL Cmd Acc 56170 EPH A-Leak 1.0200 P4GM 308.3 Yaw Mom. 1.927 Cmd Rej A 235 EPH B-Leak 0.2520 P41GM 1.9 Current Radiation Data: UTC 2001:271:17:16:41 (Sep28) f_ACE 1.17e+04 F_CRM 0.00e+00 Kp 3.3 R km 107685D Currently scheduled FPSI, OTG : HRC-S HETG Costello Kp : 3.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 1.17e+04 Orbit Start Time : 2001:269:16:19:00 Geocentric Distance (km), Orbit Leg : 107873 D CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 4.16526000000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 ************************************************************************** See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Sep_28_2001_M799.txt