Sep_14_2000_M420.txt Shift L420 Start at 2000:258:17:15:00 GMT = 2000 Sep 14 1:15pm EDT End 2000 Sep 14 1:00pm EDT SOT shift report 2000-09-14 M420 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Sep_14_2000_M420.txt SOT Lead Mark Freeman SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running SEP1200B (TOO load) but with RADMON trigger of SCS 107 yesterday at about 257:1915. P4GM channel exceeded limit of 300. New load has been built to pick up the TOO target SS CYG at about 257:2100, then move to AR LAC-3 (obsid 8), proceed to radiation/perigee pass state (w/ 2 add'l "pad" hours on entry), then continue with the load as planned before. (see note 1) ORBITAL EVENTS: 2000:258:20:04:26.609 153 EAPOGEE ORBIT APOGEE 2000:260:03:47:47.225 153 EPERIGEE ORBIT PERIGEE 2000:261:11:31:55.002 154 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 258:1715 [648] Have had continuous COMM since shift L419 (DSS-54) Status during shift - see note 2 258:1926 End of COMM 258:2015 End of shift/new load start 258:2100 NOTES/ISSUES/PROBLEMS --------------------- 1) Attended load review meeting for replan at 1:30 pm. Load is designed to intercept the current load at 258:2100, perform a couple of quick clean up functions, do a zero-length manuever to SS CYG (already pointed there but will turn on FIDs and acquire them, move the SIM to the ACIS position), and do OBSID 648, followed by OBSID 008, of AR LAC-3. Then go to rad safe positions again and disable RADMON (i.e. go to perigee pass preparation state) a couple of hours earlier than in the baseline load to give the best likelihood of entering the eclipse period with the desired state. After this, the load follows the baseline SEP1200B load. Prior to kicking off this new load, the following CAPs need to be run: 1) CAP to enable SCS 82, for rad safing during grating moves. (this was uploaded but never enabled some time ago) 2) CAP to reenable SCS 107 3) CAP 327 for a manual momentum dump. Another CAP is being prepared to recover the S/C from another RADMON trip, should one occur tomorrow while we're out of COMM, to bring us to the desired state and attitude prior to the eclipse. This CAP would run one of two possible short loads to manuever the S/C from the two possible attitudes to the pre-eclipse state and attitude, and is for contingency only. 2) S/C Status: UTC 2000:258:19:26:01 (Sep14) f_ACE 2.57e+04 F_ACE 4.73e+07 Kp 2.0 R km 142529A OBT 2000:258:19:25:24 CTUVCDU 3609292 OBC s/w NRML FMT2_EPS CPEstat OBT 85346724.09 ONLVCDU 3609280 OBC Errs 0 OBSID 648 EPState SUN SIM TTpos -99616 HETG Angle 6.7 PCADMODE NPNT RA 325.683 Bus V 30.71 SIM FApos -467 LETG Angle 78.3 PCONTROL NPNT Dec 43.610 Bus I 27.98 AOFSTAR GUID Roll 213.097 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc NNNTTTTT Dith Yang 7.90 Yaw Rate -0.34 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 7.98 Pitch Rate 0.11 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.11 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa 1.54 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -37.65 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 50.89 SA Resolv 127.57 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 13.14 HRMA power 15.50 SCS 128 -Y SA Amps 14.30 EPHIN Geom LARG OBA power 131.50 SCS 129 +Y SA Temp 112.66 E150 388.3 SCS 130 -Y SA Temp 112.66 E300 6.7 Roll Mom. -5.443 E1300 0.1 Pitch Mom. -13.425 UpL Cmd Acc 20302 EPH A-Leak 0.5160 P4GM 65.7 Yaw Mom. 11.257 Cmd Rej A 143 EPH B-Leak 0.0920 P41GM 0.1 3) Radiation levels continue HIGH but are declining slowly. Fluence still low primarily due to the presence of HETG. ACE high energy protons are exhibiting a slow downward trend, as is EPHIN P4GM. The ACE low energy proton rates continue to rise slowly.