To:sot_shift from: Dan Schwartz date: 28 Jul 00, 12:00noon EDT Subject: SOT shift report 2000-07-28 L371 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jul_28_2000_L371.txt. Shift L371. Start at 210:12:00 GMT = 08:00am 28 Jul EDT End 12:00 noon 28 Jul SOT Lead DAS ACIS BLaM (Times will be given in GMT on day 210. In general times are rough, not precise.) PLAN ---- Continue running load JUL2300. Finish OBSID 922, ACIS-S observation of the cluster A2597. Remaining observations this week are OBSID Target Time ----- ------ -------------- 00931 ABELL 496 210:17:09 ACIS-S 00865 Q0054+144 210:22:54 ACIS-S 00311 M31 TRANSIENT 211:00:46 ACIS-I 00499 A2204 211:03:08 ACIS-S 00730 KES 73 211:06:22 ACIS-S 00654 TERZAN 5 211:09:37 ACIS-I 00545 A2163 211:11:28 ACIS-I 00906 ABELL 1995 211:14:37 ACIS-S 00352 M87 211:18:25 ACIS-S radiation belt passage 01808 M87 212:20:58 ACIS-S 00932 1WGA1226.9+3332 213:01:19 ACIS-S Next Comms: 210:14:35 to 15:35 210:20:45 to 22:45 211:04:35 to 05:35 211:11:30 to 13:25 211:20:40 to 22:40 212:06:30 to 07:30 212:14:45 to 15:45 212:20:50 to 22:50 Orbital events 2000:209:21:54:58.851 134 ORBIT PERIGEE 2000:211:05:40:00.422 135 ORBIT APOGEE 2000:212:13:25:18.690 135 ORBIT PERIGEE 2000:213:21:08:58.436 136 ORBIT APOGEE 2000:215:04:54:33.404 136 ORBIT PERIGEE 2000:216:12:37:31.325 137 ORBIT APOGEE 2000:217:20:21:59.836 137 ORBIT PERIGEE 2000:219:04:05:20.035 138 ORBIT APOGEE 2000:220:11:49:02.866 138 ORBIT PERIGEE EVENTS ------ Status at LOS, 210:07:27, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 351.358 deg DEC = -12.157 deg ROLL = 104.798 deg Format = 2 OBSID = 922 A2597 SIM FA = -467 SIM TSC = 74623 (ACIS-S) HETG = OUT (80.2 deg) LETG = OUT (78.3 deg) HRC-I HV is ON EPHIN Geom = LARG E150 = 827.3 E300 = 11.2 E1300 = 0.1 LT 10.0 (RADMON P4GM = 1.7 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 0.6280 mu-a B-leak = 0.1080 mu-a Ascending through 89814 km. ACIS focal plane temperature -119.7. 14:37 AOS. (But comm is not steady) 14:50 appear to have good comm EPHIN Geom = LARG E150 = 128.3 E300 = 2.5 E1300 = 0.1 P4GM = 6.2 P41GM = 0.0 ACIS focal plane temperature -119.9. Other status essentially unchanged. 15:35 Comm extended to debug problems, and dump SSR. NOTES/ISSUES/PROBLEMS --------------------- ACIS Events on pmon, from the pass ending 07:27, show very high event rates, about 200-300 in every chip. These rates are normally 20 to 30. At AOS, 14:40, ACIS event rates are back to normal, about 20-30. Bev made a light curve which shows we had a background flare starting around 07:10. Severe loss of frames starts roughly at 07:25. At 15:00 we see that the EPHIN low energy electron rates are decreased about a factor of 6, and the 4 MeV protons have increased, since the 07:30 pass. From the 9am status meeting: 3 supports yesterday. Got an extra unscheduled support for 2 hours with DSS-16, after DSS-24 failed a transmitter 24 minutes into the pass. JUL3000 load was approved. First segment will be uplinked this morning. The off-point demo to test eclipse products has moved to Aug 15, early morning GMT -- late evening on Aug 14 EDT. In ASVT testing yesterday a problem was revealed in that mission slot SCS 132 was used, but when SCS 107 was executed all the mission load slots are disabled. Solution is to disable SCS 107 for the eclipse operations: All the SI are to be placed into a safe configuration prior to the eclipse anyway, so this is not an impact. Further ASVT testing will take place next week, of both the eclipse products and of the LETG insertion and retraction products. The FOT is starting its series of informal presentations on aspects of Chandra operations. The discussions will generally be for about 1 hour -- if the topic requires more than 2 hours it will be divided into separate meetings. Everyone is invited. The first presentation will be next Tuesday, August 1st, at 1pm in the Action Room. It will cover Configuration Management. Difficulty locking up telemetry on the DSS-54, Madrid, facility. The pass was extended to try to get the SRR dump. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 00677 4U 1543-47 208:10:50 ACIS-I Presumably ok, source could be very weak. ------------------------------------------------------- Dan Schwartz, MS #3 das@head-cfa.harvard.edu phone: (617)495-7232 FAX: (617)495-7356 cell phone: (617)512-5627 pager: 800-759-8352 PIN 1636502 or e-mail 1636502@skytel.com -------------------------------------------------------