SOT shift report 2001-04-09 M627 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_09_2001_M627.txt. Shift M627. Start at 099:19:30 GMT = 03:30pm 09 Apr EDT End 05:30pm 09 Apr SOT Lead MDF (Times will be given in GMT on day 099.) PLAN ---- Continue doing OBSID 2431, ACIS-S/HETG of NGC 3516, then perform CTI measurements surrounding perigee passage. A new flare/CME at ~16:00 GMT may augur a new round of high radiation (see note 2). Next Comms: 100:05:50 to 06:50 100:14:30 to 16:30 101:00:00 to 01:00 101:09:00 to 10:00 101:17:00 to 19:00 102:02:00 to 04:00 Orbital events: 2001:100:10:12:47.075 231 PERIGEE 2001:101:17:56:47.180 232 APOGEE 2001:103:01:40:18.402 232 PERIGEE 2001:104:09:24:00.129 233 APOGEE EVENTS TIME OBSID ------ ---- ----- Start shift 099:1930 AOS (DSS-46) 2035 Chandra systems nominal but telemetry ratty 2037 2431 46 switch to channel 2, telemetry better (see note 1) 2047 End shift 2130 NOTES/ISSUES/PROBLEMS --------------------- 1) Status of Chandra during pass: UTC 2001:099:20:47:17 (Apr 9) f_ACE 8.76e+03 F_ACE 7.35e+08 Kp 2.7 R km 105671D OBT 2001:099:20:46:33 CTUVCDU 6313764 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 103236393.04 ONLVCDU 6313752 OBC Errs 0 OBSID 2431 EPState SUN SIM TTpos 74423 HETG Angle 6.34 PCADMODE NPNT RA 166.734 Bus V 30.40 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec 72.595 Bus I 33.04 AOFSTAR GUID Roll 212.815 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 3.90 Yaw Rate 0.08 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 2.49 Pitch Rate 0.14 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.08 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -1.40 Batt 1 SOC 100.00% Avg HRMA Temp 70.65 FSS Beta -7.29 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 51.05 SA Resolv 97.29 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 16.05 RadMon ENAB HRMA power 42.60 SCS 128 ACT -Y SA Amps 17.03 EPHIN Geom LARG OBA power 102.90 SCS 129 ACT +Y SA Temp 112.35 E150 1131.7 SCS 130 ACT -Y SA Temp 111.74 E300 86.1 Roll Mom. 10.973 SCS 107 INAC E1300 1.1 Pitch Mom. -11.683 UpL Cmd Acc 65317 EPH A-Leak 0.7040 P4GM 5.8 Yaw Mom. 1.846 Cmd Rej A 234 EPH B-Leak 0.0240 P41GM 0.4 2) Radiation levels are reasonably low, although a new flare and associated CME occurred at around 16:00 GMT. GOES rates have already risen about 1 order of magnitude. We may see a new round of soft proton radiation in the next day or two; this will have to be watched. Current levels: UTC 2001:099:20:47:17 (Apr 9) f_ACE 8.76e+03 F_ACE 7.35e+08 Kp 2.7 R km 105671D Currently scheduled FPSI, OTG : ACIS-S HETG Costello Kp : 2.67 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 8.76e+03 Orbit Start Time : 2001:097:18:49:00 Geocentric Distance (km), Orbit Leg : 105944 D CRM Region : 2 (Magnetosheath) External Proton Flux (p/cm^2-s-sr-MeV) : 2.20470800000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 4.40941600000e+03 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 7.38141208770e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.48622718120e+08