To:sot_shift from: Dan Schwartz date: 09 Apr 01, 12:00noon EDT Subject: SOT shift report 2001-04-09 L627 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_09_2001_L627.txt. Shift L627. Start at 099:12:00 GMT = 08:00am 09 Apr EDT End 12:00 noon 09 Apr SOT Lead DAS (Times will be given in GMT on day 099.) PLAN ---- Uplink and start running load APR0901e at 099:14:28. Do OBSID 2431, ACIS-S/HETG of NGC 3516, then perform CTI measurements surrounding perigee passage. At start of shift, no observations were being done, as we were waiting to recover from a solar radiation event, for which we manually tripped SCS 107. Next Comms: 099:12:50 to 14:50 099:20:35 to 22:35 100:05:50 to 06:50 100:14:30 to 16:30 101:00:00 to 01:00 101:09:00 to 10:00 101:17:00 to 19:00 102:02:00 to 04:00 Orbital events: 2001:100:10:12:47.075 231 PERIGEE 2001:101:17:56:47.180 232 APOGEE 2001:103:01:40:18.402 232 PERIGEE 2001:104:09:24:00.129 233 APOGEE EVENTS ------ Status at AOS, 099:12:53, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 0 RA = 130.001 deg Dec = 29.842 deg ROLL = 251.695 deg Format = 2 OBSID = 2135 LOADS are stopped SIM FA = -467 SIM TSC = -99616 (HRC-S) HETG = OUT (79.84 deg) LETG = OUT (78.34 deg) HRC-S HV is ON EPHIN Geom = LARG E1300 = 0.1 LT 10.0 (RADMON-Disabled) P4GM = 3.0 LT 300. P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.2560 mu-a Descending through 129765 km. ACIS focal plane temperature -119.9. 13:28 RADMON enabled. 13:29 SCS 107 enabled 13:30--13:42: Stored command loads uplinked and activated. 14:00 Start Manuever 14:10 Start SIM move 14:23 Start normal pointing at NGC 3516 Status at LOS, 099:14:49, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 166.746 deg Dec = 72.594 deg ROLL = 212.804 deg Format = 2 OBSID = 2431 NGC 3516 SIM FA = -467 SIM TSC = 74423 (ACIS-S) HETG = IN ( 6.34 deg) LETG = OUT (78.34 deg) HRC-S HV is ON EPHIN Geom = LARG E1300 = 0.2 LT 10.0 (RADMON-ENABLED P4GM = 2.7 LT 300. triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.2520 mu-a Descending through 125286 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS From the 9am status meeting: 8 supports over the weekend, including an extended 10 hour support to evaluate radiation and eventually execute SCS 107. CAPs were run successfully to insert and retract the LETG, as previously reported in M624 and L625 reports. CAP 593 was run at 097:04:40 to execute SCS 107 and stop the observing program, due to high levels of soft solar protons. Replan APR0901e was approved and uplinked this morning, to enable resumption of the science observing program with OBSID 2431 at 099:14:28. As part of the restart process, this observation was increased to 36 Ksec duration. There was a problem with the APR0901e load: It was missing a RADMON enable, and the load review yesterday did not catch this. The RADMON enable should appear in the load in general, and it should be the SI responsibility to verify. M. Juda will work the necessary process improvement to ensure this. A CAP was run this morning to manually enable RADMON and SCS 107. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 2000 CRAB NEBULA 096:05:55 ACIS-S Looks good 1013 PKS2155-304 096:14:56 HRC-S LETG Looks good. Cal obs. 2297 4U 0241+61 096:23:32 ACIS-S LETG 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 -------------------------------------------------------