To:sot_shift from: Dan Schwartz date: 01 Dec 03, 12:00noon EST Subject: SOT shift report 2003-12-01 L1593 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_01_2003_L1593.txt. Shift L1593. Start at 335:13:00 GMT = 08:00am 01 Dec EST End 10:00am 01 Dec SOT Lead DAS (Times will be given in GMT on day 335.) PLAN ---- Continue running load DEC0103B. Entering radiation belts and perigee passage. Next Comms: 335:1635 to 1735 336:0345 to 0445 336:1200 to 1400 336:1945 to 2045 337:0135 to 0235 337:1200 to 1300 337:1845 to 2045 Orbital events: 2003:335:15:16:57.671 596 EPERIGEE ORBIT PERIGEE 2003:336:23:01:18.286 597 EAPOGEE ORBIT APOGEE 2003:338:06:45:17.673 597 EPERIGEE ORBIT PERIGEE 2003:339:14:29:38.600 598 EAPOGEE ORBIT APOGEE 2003:340:22:14:18.092 598 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at LOS, 335:13:37, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 8 FIDS = 0 RA = 190.992 deg Dec = -71.000 deg ROLL = 115.620 deg Format = 2 OBSID = 60464 perigee passage SIM FA = -467 SIM TSC = -99616 (HRC-S) DITHER = ENAB HETG = OUT (79.46 deg) LETG = OUT (77.59 deg) HRC-I HV is ON EPHIN Geom = SMAL E150 = 33.5 E300 = 0.1 E1300 = 0.1 LT 10.0 (RADMON P4GM = 0.0 LT 300. Disabled) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 1.0200 mu-a Descending through 36160 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS From the 9am status meeting: Fifteen supports since last Wednesday. Minor issues with DSS-46 locking up, but all data recovered and no significant problems. Four load segments have been uplinked, on-board loads are good until 339:05:15. DEC0803 schedule in work. Products expected out late today for load review tomorrow. We are seeing recurring problems with EPHIN when it is at very high temperatures. +27 rail voltage goes down to ~+13, slowly recovers as EPHIN cools. The G-channel (anti-coincidence) HV decreases from 900v to 600v at that time. Expect power supply is being current limited in the EIO. TELECON today at 2pm EST, 405-244-5060 1165# to discuss EPHIN situation. Expect a requirements review this week, hope for Wednesday, to enable initiation of work on the patch to use HRC as radmon trigger instead of EPHIN, and to incorporate two different trigger levels to use for different parts of the orbit. George Leussis writes: "With the EHS 3.9.[4] installation approaching, [this Thursday] all users of the EHS system are asked to back up any and all data in their EHS user directories on workstations and servers to either lucky/office machines or the UDE database." Today will be the database backup -- expected to take 4-5 hours. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 5187 0 zeta Lep 330:15:41 ACIS-I NONE looks good 4767 0 PMN J0214-0518 330:17:04 ACIS-S NONE looks good 4827 0 SDS 2357+0043 330:18:37 ACIS-I NONE looks good 5248 0 SDSSJ080154.24+44123 331:00 ACIS-S NONE looks good 4905 0 FTM 0915+2418 331:03:48 ACIS-S NONE looks good 3987 0 4C 25.40 FIELD 331:05:05 ACIS-I NONE looks good 3755 0 SU AUR 331:10:03 ACIS-S HETG looks good 3966 0 SDSS 1306+0356 JET 333:07:39 ACIS-S 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 -------------------------------------------------------