To:sot_shift from: Dan Schwartz date: 26 Mar 04, 12:00noon EST Subject: SOT shift report 2004-03-26 L1709 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/web-cxc/htdocs/acis/SOT_reports/Mar_26_2004_L1709.txt. Shift L1709. Start at 086:13:00 GMT = 08:00am 26 Mar EST End 10:30am 26 Mar SOT Lead DAS (Times will be given in GMT on day 086.) PLAN ---- Continue running load MAR2204B. Finish obsid 5165, an ACIS-I calibration observation of G21.5-09, then do cti measurements surrounding perigee passage. Next Comms: 086:1655 to 1855 087:0250 to 0450 087:1115 to 1215 087:1945 to 2145 088:0345 to 0445 088:1200 to 1300 088:1945 to 2045 089:0345 to 0445 089:0820 to 1020 089:1700 to 1900 090:0345 to 0445 090:1235 to 1335 090:1720 to 1920 Orbital events: 2004:086:23:36:52.122 640 EPERIGEE ORBIT PERIGEE 2004:088:07:20:35.586 641 EAPOGEE ORBIT APOGEE 2004:092:06:32:40.100 642 EPERIGEE ORBIT PERIGEE 2004:093:14:16:13.822 643 EAPOGEE ORBIT APOGEE 2004:094:21:59:38.041 643 EPERIGEE ORBIT PERIGEE 2004:096:05:43:27.982 644 EAPOGEE ORBIT APOGEE 2004:097:13:26:31.774 644 EPERIGEE ORBIT PERIGEE 2004:098:21:10:05.443 645 EAPOGEE ORBIT APOGEE 2004:100:04:53:46.756 645 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at LOS, 086:12:58, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 4 FIDS = 0 RA = 278.449 deg Dec = -10.542 deg ROLL = 92.889 deg Format = 2 OBSID = 5165 G21.5-09 SIM FA = -535 SIM TSC = 92903 (ACIS-I) DITHER = ENAB HETG = OUT (79.46 deg) LETG = OUT (77.59 deg) HRC-S HV is ON EPHIN Geom = LARG E150 = 0.2 E300 = 0.0 E1300 = 0.0 LT 10.0 (RADMON P4GM = 0.0 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.7320 mu-a Descending through 83854 km. ACIS focal plane temperature -119.7. EPH temp 85.17 NOTES/ISSUES/PROBLEMS From the 9am status meeting: Three 34m supports in the past day. One dump had two corrupted memory words. One reported a thruster firing, which we knew was impossible. The errors were noted before resetting the pointers, and the memory was re-dumped. The errors were absent in the second dump, pointing to an origin in the DSN system. These errors are similar to a few we have previously seen, but for which we couldn't re-dump the memory and therefore could not diagnose the origin. One load segment was uplinked, completing the MAR2204B week. On-board loads are good until 089:07:59. MAR2904B had a missing star, MAR2904C products were sent out for email review and an anticipated signoff this morning. A momentum unload will be needed next Monday. CAP review today at 3pm. Obsid 5168, an HRC-S calibration observation of G21.5-09, had no fid lights. This was noted in real time, and the remainder of the week's load was verified to be okay. The situation arose due to coincident errors in star/fid selection (which didn't configure the fid commands) and backstop checking (which didn't identify that the commands were missing). The latter has had a quick fix applied and Rob verified that it would have caught this error in the load. We need analysis and assessment by the calibration group whether the observation needs to be repeated. REMINDER: NE-80 POWER outage is planned for Saturday, April 10. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 4620 CXOU J010043.1-72113 085:04:42 ACIS-S NONE looks good 4752 M81 X-9 Obs 2 085:10:24 ACIS-S NONE Looks good 5184 alpha Lac 085:12:16 ACIS-I NONE target not obvious 4776 F1320-4207 085:14:11 ACIS-S NONE target not obvious 4890 2123-463 085:16:34 ACIS-S NONE Looks good 5167 G21.5-09 085:18:57 HRC-I NONE Looks good ------------------------------------------------------- Dan Schwartz, MS #3 das@head-cfa.harvard.edu phone: (617)495-7232 FAX: (617)495-7356 cell phone: (617)512-5627 pager: 877-693-7198 PIN 693-7198 or e-mail 6937198@archwireless.net -------------------------------------------------------