To:sot_shift from: Dan Schwartz date: 05 Apr 02, 12:00noon EST Subject: SOT shift report 2002-04-05 L988 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_05_2002_L988.txt. Shift L988. Start at 095:13:00 GMT = 08:00am 05 Apr EST End 12:00 noon 05 Apr SOT Lead DAS Spac/Aspect FOT/Sci liason HRC ACIS (Times will be given in GMT on day 095.) PLAN ---- Continue running load APR0302C. Finish ACIS-I observation of the nearby cluster of galaxies ABELL 2147, obsid 3211. Then start an ACIS-S observation of the edge-on disk galaxy NGC 5775, obsid 2940. No Comm this shift. Next Comms: 095:2100 to 2200 096:0500 to 0600 096:1500 to 1600 096:2230 to 2330 097:0720 to 0920 097:1740 to 1840 Orbital events: 2002:096:09:36:13.313 368 ORBIT APOGEE 2002:097:17:20:21.888 368 ORBIT PERIGEE 2002:099:01:03:45.984 369 ORBIT APOGEE 2002:100:08:47:09.593 369 ORBIT PERIGEE 2002:101:16:31:26.096 370 ORBIT APOGEE 2002:103:00:14:40.847 370 ORBIT PERIGEE 2002:104:07:59:16.027 371 ORBIT APOGEE EVENTS ------ Status at LOS, 095:13:04, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 240.553 deg Dec = 15.949 deg ROLL = 111.871 deg Format = 2 OBSID = 3211 Abell 2147 SIM FA = -535 SIM TSC = 92903 (ACIS-I) HETG = OUT (79.46 deg) LETG = OUT (77.96 deg) HRC-S HV is ON EPHIN Geom = LARG 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 = 0.2960 mu-a Ascending through 92216 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS REMINDER: Daylight savings time is coming. At 1am EST Sunday, April 6, which is day 096:0600GMT, we set clocks in Cambridge MA to be 2am EDT. You may think about this as "late Saturday night," April 5. Subsequently GMT will be only 4 hours ahead of local time. From the 9am status meeting: Three supports in last 24 hours, no problems, first load segment of APR0802C was uplinked. On-board loads good until 099:11:01. CAP 750B was run during perigee (when RADMON was disabled) to get the status of the ephin error registers. Flight Director's CCB approved the new Command Sequence Definition to carry out the charge injection test, and this was included in the APR0803C load to execute during orbit 369 perigee passage. APR1502 loads are in work, products expected out today for email review on Monday. The limit trips which occured following the SCS 107 activation have been investigated, and all were normal occurences under the circumstances. A telecon yesterday approved sending authorization to work on a patch to change the OBC K-constant glitch limits KR.Num_EIO and KR.Num_EPHIN from 1 to 5. We expect this to be created and tested in time to present to the FD CCB next Thursday. Meanwhile, Chris Johnson will investigate possible flight software patches to catch subsequent occurences of spuriously missed updates to the EPHIN and EIO counters (which previously could only be detected when SCS 107 stopped the observing program). EHS is currently down for its quarterly backups and reboots -- email will be sent when this is completed. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 3003 RX J1258+23 094:03:10 ACIS-S NONE Looks good 2982 NGC 4410A 094:04:11 ACIS-S NONE Looks good 2543 HD133880 094:15:59 ACIS-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 -------------------------------------------------------