Feb_18_2000_L210.txt Shift L210 Start at 2000:049:12:30:00 GMT = 2000 Feb 18 7:30am EST End 2000 Feb 18 12:00pm EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_18_2000_L209.txt SOT Lead Bill Podgorski SOT SC/ACA Rob Cameron FOT-SI Andy Northrup, Eric Martin HRC-SI Mike Juda ACIS-SI Yousaf Butt OTHER PLANS: Today:- Next step in safe mode recovery, perform fine attitude initilaization per CAP 456A. - Did not complete fine attitude initialization, will complete tomorrow in 7am to 7pm pass. Weekend: - Overall plan is to intercept FEB20 load at 052:0145 (Sunday 8:45pm) and not try to do observations before that time. - Rad zone passage 7pm Sat to 5am Sunday (EST). Will do CTI measurement in time after Sunday 11:30am (EST) pass and beginning of FEB20 load. - In Sunday COMM will do following activities: * Check EPHIN & ACE rates, If low enough then Enable RADMON Execute HRC CAP 566, sets initial conditions Execute ACIS CAP to initiate CTI measurement - FEB20 load products to be out today, review tomorrow. EVENTS DONE OBSID -------------- ---- ----- Start Shift 049:1130 0 AOS - Status as expected (see note 1) 049:1200 Review CAP 456A 1215 Execute CAP 456A to recover fine atttitude 1230 - Execute CAP 570 to set eph time 1236 Complete 570 1254 - Step 7, execute CAP 226 stps 3 and 4 to command IRU1 to lo rate 1302 - Complete and verified 1308 - Step 8, command to Attitude Hold Submode 1309 - Step 9, execute CAP 454A 1310 Step 3 of 454A, full-field search 1313 - Complete, get 8 stars 1316 - Start step 10, Update OBC IRU bias 1317 Dwell on stars Pattern match and determine attitude and IRU bias Attitude found, RA: 65.654 deg DEC: -19.271 deg ROLL: 282.582 deg Calculate IRU Bias 1537 Command AOSUNMAU to command Sun Point 1537 Prepare/uplink load to update IRU bias and uplink 1610 - Start step 11 Update Command attitude hold submode 1610 Note: yaw bias correction better than pitch Dwell Perform star pattern match Prepare and uplink command load to update 1648 estimated attitude RA: 65.601614 DEC: = -19.185627 ROLL = 282.201630 - Step 12, command Sun Point submode 1650 - Step 13 Set up Attitude command generation Disable attitude command generation 1653 Reinitialize att cmd gen (inits cmd and est quat to 1654 current quat) Verify above 1655 Complete step 13 1700 LOS 1715 NOTES/ISSUES/PROBLEMS --------------------- (1) Status at AOS: UTC 2000:049:12:01:02 (Fri Feb 18) f_ACE 4.37e+02 F_ACE 5.04e+06 R km 134053A OBT 2000:049:12:00:28 CTUVCDU 145295 OBC s/w NRML FMT4_PCAD CPEstat NORM OBT 67262428.54 ONLVCDU 71152 OBC Errs 0 OBSID 0 EPState SUN SIM TTpos -99616 HETG Angle 80.6 PCADMODE NSUN RA 1.424 Bus V 30.55 SIM FApos -467 LETG Angle 79.1 PCONTROL SPNT Dec -0.417 Bus I 30.01 AOFSTAR GUID Roll 358.962 ACA Object SSSSSSSS Dither DISA HRC-I HV OFF ACA ImFunc NRRRRRRR Dith Yang 0.00 Yaw Rate -0.54 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 0.00 Pitch Rate -0.25 OBSMode NEXT ACA Int Time 0.705 Roll Rate 0.68 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.07 Batt 1 SOC 100.00% Avg HRMA Temp 70.56 FSS Beta -0.27 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 51.13 SA Resolv 90.09 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 14.30 HRMA power 35.80 -Y SA Amps 15.46 EPHIN Geom LARG OBA power 43.20 +Y SA Temp 114.51 E1300 4 -Y SA Temp 114.51 P4GM 8 Roll Mom. 18.479 SCS 128 P41GM 0 Pitch Mom. 1.419 SCS 129 UpL Cmd Acc 64780 A-Leak 0.4720 Yaw Mom. -2.499 SCS 130 Cmd Rej A 249 B-Leak 0.0720