SOT shift report 2000-09-29 H435 Start at 2000:273:06:00 GMT = 2000 Sept. 29 02:00am EDT End 03:30am EDT See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Sept_29_2000_H435.txt SOT Lead Robert Cameron Mechanisms: Andrew Northrup Plan: ---- Stop mission load SEP2400c. Upload mission load SEP0028b, containing GRB000926 TOO observation. Manual retraction of LETG for GRB000926 observation. Seq # ObsID Target start SI Grat RA dec roll ------------------------------------------------------------------------------------------ ---- 61900 CAL-ER 2000:273:01:11:06.364 -- -- 20.3600 23.2200 143.40 ---- 61899 CAL-ER 2000:273:13:25:51.838 -- -- 20.3600 23.2200 144.11 500084 00598 GRB000926 2000:273:16:40:24.043 ACIS-S LETG 256.0095 51.7948 287.79 200026 00028 YY GEM 2000:273:21:30:00.000 HRC-S LETG 113.6701 31.8476 78.28 EVENTS GMT OBSID ------ ---- ----- AOS DSS-24 (Goldstone 34m) 0630 61900 LOS DSS-24 (Goldstone 34m) 0809 Orbital Events: -------------- 2000:272:01:24:46.327 158 EAPOGEE ORBIT APOGEE 2000:273:09:08:21.466 158 EPERIGEE ORBIT PERIGEE 2000:274:16:51:48.585 159 EAPOGEE ORBIT APOGEE 2000:276:00:34:51.878 159 EPERIGEE ORBIT PERIGEE 2000:277:08:18:48.989 160 EAPOGEE ORBIT APOGEE 2000:278:16:02:35.176 160 EPERIGEE ORBIT PERIGEE NOTES/ISSUES/PROBLEMS --------------------- Realtime telemetry was not flowing to the ACA, HRC or ACIS EGSEs during the DSN contact. There was no problem during the previous DSN contact. Restarting the telemetry receipt software on the ACA EGSE did not fix the problem there. The problem was not fixed before realtime telemetry ceased. The GOT had been working on a firewall in the evening, which may be related to this problem. ACE radiation levels are ok: 2-hour average ACE P3 rate = 1119 cts/s. The LETG retraction was performed without problem, using CAP 659 Rev C. The retraction was performed with one 153-second move, plus 8 128-ms moves, for a total LETG drive time of 154.0 seconds. The previous LETG retraction on August 12 required 9 128-ms moves. MCE motor back-emf during the large move was about 6.6 volts. UTC Timeline of events: 0635: Stop SEP2400c and upload SEP2800b load. 0641: SSR playback started. 0643: Start CAP 659 Rev C. 0646: NMAN mode. 0651: Format 4. 0655: apply LETG motor power. 0656: 152-second retraction. 0700 - 0705: 8 short retract moves. 0705: LETG retracted (indicated by MCE-B retract limit switch) 0712: NPNT mode re-established. 0720: CAP 659 Rev C completed. Chandra snapshot ---------------- Before LETG retraction: UTC 2000:273:06:36:01 (Sep29) f_ACE 9.92e+02 F_ACE 0.00e+00 Kp 1.3 R km 37885D OBT 2000:273:06:35:34 CTUVCDU 8486603 OBC s/w NRML FMT2_EPS CPEstat NORM OBT 86596534.48 ONLVCDU 8486592 OBC Errs 0 OBSID 61900 EPState SUN SIM TTpos -99616 HETG Angle 79.8 PCADMODE NPNT RA 20.356 Bus V 30.24 SIM FApos -990 LETG Angle 4.5 PCONTROL NPNT Dec 23.224 Bus I 30.26 AOFSTAR GUID Roll 143.407 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 20.00 Yaw Rate -0.06 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 5.21 Pitch Rate -0.31 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.12 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -49.62 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -49.78 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.50 SA Resolv 155.04 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 14.49 RADMON DISA HRMA power 110.40 SCS 128 INAC -Y SA Amps 15.26 EPHIN Geom SMAL OBA power 59.30 SCS 129 DISA +Y SA Temp 113.58 E150 310634.1 SCS 130 DISA -Y SA Temp 113.89 E300 31219.5 Roll Mom. 1.548 E1300 1034.6 Pitch Mom. -6.250 UpL Cmd Acc 40583 EPH A-Leak 0.3640 P4GM 19902.4 Yaw Mom. 1.366 Cmd Rej A 188 EPH B-Leak 0.0600 P41GM 1.4 After LETG retraction: UTC 2000:273:07:27:02 (Sep29) f_ACE 9.09e+02 F_ACE 0.00e+00 Kp 1.3 R km 29903D OBT 2000:273:07:26:38 CTUVCDU 8498559 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 86599598.19 ONLVCDU 8498544 OBC Errs 0 OBSID 61900 EPState SUN SIM TTpos -99616 HETG Angle 79.8 PCADMODE NPNT RA 20.359 Bus V 29.93 SIM FApos -990 LETG Angle 78.3 PCONTROL NPNT Dec 23.223 Bus I 35.58 AOFSTAR GUID Roll 143.405 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 8.23 Yaw Rate 0.26 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 6.51 Pitch Rate -0.23 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.34 Door OP UNAC AOACSTAT OK FSS SunBeta NSUN Door CL UNAC FSS Alfa -49.63 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta -49.80 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.50 SA Resolv 155.24 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 17.23 RADMON DISA HRMA power 32.70 SCS 128 ACT -Y SA Amps 18.02 EPHIN Geom SMAL OBA power 131.50 SCS 129 DISA +Y SA Temp 113.58 E150 116682.9 SCS 130 ACT -Y SA Temp 113.89 E300 19177.7 Roll Mom. 1.703 E1300 12422.8 Pitch Mom. -8.333 UpL Cmd Acc 44056 EPH A-Leak 0.6400 P4GM 10579.9 Yaw Mom. 1.175 Cmd Rej A 12 EPH B-Leak 0.1680 P41GM 129.4