To:sot_shift from: Dan Schwartz date: 14 Nov 01, 12:00noon EST Subject: SOT shift report 2001-11-14 L846 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_14_2001_L846.txt. Shift L846. Start at 318:12:00 GMT = 08:00am 14 Nov EST End 12:00 noon 14 Nov SOT Lead DAS (Times will be given in GMT on day 318.) PLAN ---- Continue running load NOV1201E. Performing obsid 3293, the Hubble Deep Field north, with ACIS-I, for this entire orbit. Next Comms: 318:2000 to 2100 319:0520 to 0620 319:1450 to 1640 320:0310 to 0410 320:0950 to 1150 320:1800 to 1900 320:2330 to 0030 Orbital events: 2001:319:22:02:48.928 314 EPERIGEE ORBIT PERIGEE 2001:321:05:46:51.532 315 EAPOGEE ORBIT APOGEE 2001:322:13:31:09.971 315 EPERIGEE ORBIT PERIGEE 2001:323:21:14:40.288 316 EAPOGEE ORBIT APOGEE 2001:325:04:59:23.671 316 EPERIGEE ORBIT PERIGEE 2001:326:12:42:52.715 317 EAPOGEE ORBIT APOGEE 2001:327:20:26:53.907 317 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at LOS, 318:03:49, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 189.198 deg Dec = 62.194 deg ROLL = 40.330 deg Format = 2 OBSID = 3293 HDF-N SIM FA = -535 SIM TSC = 92903 (ACIS-I) HETG = OUT (79.46 deg) LETG = OUT (77.96 deg) HRC-I HV is ON EPHIN Geom = LARG E1300 = 0.1 LT 10.0 (RADMON P4GM = 0.8 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.4440 mu-a Ascending through 127393 km. ACIS focal plane temperature -119.9. 13:35 AOS. Status is essentially unchanged. ACIS focal plane temperature -119.9. 13:45 Start SSR playback 13:28 SSR playback complete. 14:35 LOS. Status is essentially unchanged. Descending through 138135 km. ACIS focal plane temperature -119.9. NOTES/ISSUES/PROBLEMS For the HDF-N, we are in very faint mode, but only getting 40 to 80 events per 3.1 second frame, so we are well below telemetry saturation. At an ACIS ops telecon yesterday afternoon, We noted that a CAP to reset the FEP in case of T-Plane latchup should ONLY be run if the latchup occurs at the start of the run, and really only if we can verify that ACIS tried to trickle bias. The reason is that if the trickle bias does not cause the T-plane latchup (and trickle bias can only occur at the start of a science run) then we are facing a new and different anomaly for which diagnosis must be performed prior to taking action appropriate to that anomaly. We had prepared CAP 760 to protect the very long HDF-N observation by resetting FEP; however, this fortunately was not needed since the comm pass at 317:1700 verified that the run had started properly. From the 9am status meeting: On-board loads good through 321:14:05. Email review yesterday, revised products out this morning for a 2pm review of NOV1901B. Kevin is working the NOV2601. We need an email review Monday and final review on Tuesday, to avoid conflict with Thanksgiving holiday. Rich is testing the contingency HETG insert and retract CAPs on ASVT. ASVT did not behave yesterday, will try again this afternoon. These CAPs are for potential use during the Leonid shower, when we want to keep ACIS-I at the aim point. GOT will do a database backup this morning. Following tomorrow's 9am status meeting, there will be CAP reviews for the 7 individual Leonid CAPs. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 2482 NGC 3516 315:01:19 ACIS-S HETG Looks good. 2961 PSS 0902+1640 317:13:28 ACIS-S NONE No source visible ------------------------------------------------------- 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 -------------------------------------------------------