May_19_2000_L301.txt Shift L301 Start at 2000:140:11:30:00 GMT = 2000 May 19 7:30am EDT End 2000 May 19 12:00pm EDT See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/May_19_2000_L301.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Finished long observation of EX HYDRAE, obsid 1706 with ACIS-S/HETG. Grating retracted after observation (per pot angle), at about 140:0239. Two short observations followed; BAL 1312+2319 (obsid 852) and MS 1455.0+2232 (obsid 543). Currently observing NGC 4374 (M84), obsid 803, throughout shift with next COMM scheduled at 18:30 GMT. ORBITAL EVENTS: 2000:135:20:45:03.087 106 EPERIGEE ORBIT PERIGEE 2000:137:04:28:38.212 107 EAPOGEE ORBIT APOGEE 2000:138:12:11:43.085 107 EPERIGEE ORBIT PERIGEE 2000:139:19:55:59.661 108 EAPOGEE ORBIT APOGEE 2000:141:03:39:15.920 108 EPERIGEE ORBIT PERIGEE 2000:142:11:23:34.854 109 EAPOGEE ORBIT APOGEE 2000:143:19:07:45.474 109 EPERIGEE ORBIT PERIGEE 2000:145:02:51:24.781 110 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift LOS 140:1130 Status at last contact 140:0930 was nominl (see note 1) End of shift 140:1630 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at last contact: UTC 2000:140:09:30:02 (Fri May 19) f_ACE 6.08e+02 F_ACE 1.11e+08 R km 125290D OBT 2000:140:09:29:20 CTUVCDU 14015231 OBC s/w NRML FMT2_NORM CPEstat OBT 75115760.47 ONLVCDU 14015216 OBC Errs 0 OBSID 803 EPState SUN SIM TTpos 75624 HETG Angle 80.2 PCADMODE NPNT RA 186.257 Bus V 30.87 SIM FApos -467 LETG Angle 78.3 PCONTROL NPNT Dec 12.908 Bus I 31.78 AOFSTAR GUID Roll 237.228 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 1.03 Yaw Rate -0.01 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 7.22 Pitch Rate 0.21 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.09 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.32 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -30.98 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 50.73 SA Resolv 120.92 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 15.07 HRMA power 92.00 -Y SA Amps 16.25 EPHIN Geom LARG OBA power 140.70 +Y SA Temp 110.20 E1300 6 -Y SA Temp 110.82 P4GM 12 Roll Mom. 0.815 SCS 128 P41GM 0 Pitch Mom. -8.884 SCS 129 UpL Cmd Acc 24154 A-Leak 0.2360 Yaw Mom. 5.317 SCS 130 Cmd Rej A 159 B-Leak 0.0400 Expected: RA, Dec, Roll (degrees): 186.25919, 12.90736, 237.22763 2) Notes from 9:00am meeting: Operations yesterday (Leon McKendrick): - Three supports yesterday, all 34m, 3 SSR dumps all OK - Loads good thru 142:2254 Mission Planning (Dan/Ken/Kevin): - Rebuilt MAY21 load as result of comments in load review yesterday. - Products out, load review for MAY2100B today. Spacecraft Engineering (Jeff/Rino): - HRTG insertion/retraction yesterday was good - Star acquisitions looking good - Rino identified 3 thermal issues: * Day 137 observation (obsid 637) had large pitch attitude of 166 degrees for over a day. (Tail to sun) He saw periscope and OBA temperatures and gradients that were larger than nominal but still in spec. Aspect scientists notified. * Ultra-Stable-Oscillator (USO) had much larger temp variations than normal last week (controlled oven temp). He was going to look into the requirements and look more closely at this temp over time. * He saw some offsets in equillibrium temp values for some HRMA temps over the last safe-mode event. They are still well within spec, but he will examine why there were such offsets. SOT (Bill Podgorski): - Radiation levels good. ASCDSOPS(Joy): - One quick look (obsid 637). 3) Quick Look data review: OBSID Target Time Comment ----- ------ -------------- ------- 00637 RHO OPH A 000:136:23:10 Looks OK 4) Star selection meeting held. Dan Shropshire to publish minutes.