To:sot_shift from: Dan Schwartz date: 12 Sep 03, 12:00noon EDT Subject: SOT shift report 2003-09-12 L1513 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Sep_12_2003_L1513.txt. Shift L1513. Start at 255:12:00 GMT = 08:00am 12 Sep EDT End 10:00am 12 Sep SOT Lead DAS (Times will be given in GMT on day 255.) PLAN ---- Continue running load SEP0803A. Finish obsid 3930, an ACIS-S observation of the starburst-blown superbubble in the dwarf galaxy NGC 1705. Next Comms: 255:1640 to 1840 255:2130 to 2330 256:1210 to 1310 256:2030 to 2130 257:0345 to 0445 257:1315 to 1415 257:2200 to 2300 258:0345 to 0445 258:1150 to 1350 258:1550 to 1650 259:0420 to 0520 259:1530 to 1630 259:2345 to 0045 Orbital events: 2003:256:07:25:57.777 566 EPERIGEE ORBIT PERIGEE 2003:257:15:10:22.670 567 EAPOGEE ORBIT APOGEE 2003:258:22:54:24.918 567 EPERIGEE ORBIT PERIGEE 2003:260:06:38:32.019 568 EAPOGEE ORBIT APOGEE EVENTS ------ Status at LOS, 254:22:45, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 328.395 deg Dec = 17.710 deg ROLL = 223.719 deg Format = 2 OBSID = 4193 Abell 2390 SIM FA = -467 SIM TSC = 75623 (ACIS-S) DITHER = ENAB HETG = OUT (79.46 deg) LETG = OUT (77.59 deg) HRC-I HV is ON EPHIN Geom = LARG E150 = 0.5 E300 = 0.1 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 = 0.1960 mu-a ACIS focal plane temperature -118.9. 255:13:18 descending through 111839km. NOTES/ISSUES/PROBLEMS From the 9am status meeting: We have missed two consecutive passes due to ground problems, believed somewhere in the special function gateway -- data doesn't get past the GSFC network. We filled SSR-A and rolled over to SSR-B at 255:06:08. SSR-B will fill at 256:00:30. There are two comm passes before then, and we will need a good downlink at the 255:1640 to 1840 pass in order to clear enough data and avoid SSR-B from filling (at which point we continue the observing program, but lose all the new data). The top technical experts at JPL are working the problem. A tag-up is planned prior to the next pass. Please include sot_lead on any email. If we have uplink capability, we may need to make a choice of discarding data on the recorder or losing data from a new observation. The first segment of SEP1503A was uplinked, and on-board loads are good through 258:04:02. We currently do not have uplink capability, but there are 7 comm passes before we hit the end of on-board loads. FOT/MP will check how long we can remain at the end-of-load pointing position. SEP2203 products are in work. Expect them out Monday for load review on Tuesday. OCC ground team is supporting debug of the communications problems. They have looked at the real time data from the 0545-0645 pass to determine the SSR-A to B rollover time, and expect to get realtime data from the 1100-1300 pass for checking spacecraft status. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 3813 BO 375 253:02:53 HRC-I NONE looks good 4065 BR 0353-3820 253:04:55 ACIS-S NONE looks good 4081 SDSS J015652.43-0012 253:06:28 ACIS-S NONE looks good 4193 ABELL 2390 254:01:02 ACIS-S NONE looks good 3962 SDSS J222509-001406 253:23:38 ACIS-S NONE target not obvious ------------------------------------------------------- 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 -------------------------------------------------------