To:sot_shift from: Dan Schwartz date: 21 Nov 01, 12:00noon EST Subject: SOT shift report 2001-11-21 L853 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_21_2001_L853.txt. Shift L853. Start at 325:12:45 GMT = 07:45am 21 Nov EST End 12:00 noon 21 Nov SOT Lead DAS (Times will be given in GMT on day 325.) PLAN ---- Continue running load NOV2101A. This is the restart from radiation shutdown. It is currently idle, but will start obsid 3389, the HDF-N with ACIS-I, at 14:33. Next Comms: 325:1245 to 1345 325:1705 to 1805 325:2300 to 0000 326:0355 to 0555 326:1335 to 1435 326:2330 to 0030 327:0750 to 0950 327:1500 to 1600 327:2215 to 2315 328:0310 to 0510 328:1430 to 1530 328:2245 to 2345 329:0530 to 0730 329:1630 to 1730 Orbital events: 2001:326:12:42:52.715 317 EAPOGEE ORBIT APOGEE 2001:327:20:26:53.907 317 EPERIGEE ORBIT PERIGEE 2001:329:04:10:53.546 318 EAPOGEE ORBIT APOGEE 2001:330:11:54:23.905 318 EPERIGEE ORBIT PERIGEE 2001:331:19:39:00.329 319 EAPOGEE ORBIT APOGEE 2001:333:03:22:48.683 319 EPERIGEE ORBIT PERIGEE 2001:334:11:08:04.639 320 EAPOGEE ORBIT APOGEE 2001:335:18:52:22.197 320 EPERIGEE ORBIT PERIGEE 2001:337:02:36:49.264 321 EAPOGEE ORBIT APOGEE 2001:338:10:22:15.636 321 EPERIGEE ORBIT PERIGEE 2001:339:18:05:54.482 322 EAPOGEE ORBIT APOGEE 2001:341:01:51:06.084 322 EPERIGEE ORBIT PERIGEE 2001:342:09:34:21.745 323 EAPOGEE ORBIT APOGEE 2001:343:17:18:29.578 323 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at LOS, 325:02:00, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 0 RA = 64.598 deg Dec = 28.503 deg ROLL = 134.380 deg Format = 2 OBSID = 3363 (left over from SCS107) SIM FA = -467 SIM TSC = -99616 (HRC-S) HETG = OUT (79.46 deg) LETG = OUT (77.96 deg) HRC-S HV is ON EPHIN Geom = SMAL E1300 = 25.2 LT 10.0 (RADMON P4GM = 13485.1 LT 300. disabled) P41GM = 0.2 LT 8.47 A-leak = 0.2440 mu-a B-leak = 0.0480 mu-a Descending through 41247 km. 12:45 AOS. Status essentially unchanged. Ascending through 75565 km EPHIN Geom = Larg E1300 = 0.1 LT 10.0 (RADMON P4GM = 21.9 LT 300. disabled) P41GM = 0.0 LT 8.47 13:43 LOS. Status essentially unchanged. P4GM down to 17.8 Ascending through 81300 km. ACIS focal plane temperature -117.8. NOTES/ISSUES/PROBLEMS From the 9am status meeting: Three CAPs were run yesterday, 768 for a manual momentum dump, 740 to reposition HRC door for SCS 107 recovery, and the SCS107 enable CAP. NOV2101A replan was uploaded. At the 8am radiation telecon we decided to allow the loads to continue. The ACE flux has been flat at 25,000, and at that rate we can continue for only one day -- i.e. we would need to stop the loads at the 326:13:35 GMT (8:35am tomorrow) comm. However, from the higher energy decay rates we can expect that the average 112-187 proton flux will only be about 12,000 for the orbit, for a high but acceptible fluence for the orbit of about 1.9e9. However, our current pointing direction is NOT good for perigee passage. Since it is credible that we will stop the loads, FOT/MP must build a contingency load which will perform a maneuver prior to perigee in the event we terminate NOV2101A. This will require only PCAD, ACA, and command management review. NOV2601C products are out, load review will be at noon. The EHS reboot has been slipped to next week. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 2679 NGC 7099 323:03:17 ACIS-S NONE looks okay. ------------------------------------------------------- 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 -------------------------------------------------------