To:sot_shift from: Dan Schwartz date: 08 May 03, 12:00noon EDT Subject: SOT shift report 2003-05-08 L1386 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/May_08_2003_L1386.txt. Shift L1386. Start at 128:13:00 GMT = 08:00am 08 May EDT End 12:00 noon 08 May SOT Lead DAS (Times will be given in GMT on day 128.) PLAN ---- Continue running load MAY0505C. (Still) doing obsid 4063, an ACIS-S/HETG observation of the most luminous nearby quasar, PDS 456. Next Comms: 128:2010 to 2210 129:0220 to 0350 129:1300 to 1420 129:2010 to 2210 130:0500 to 0600 130:1315 to 1415 130:2035 to 2235 131:0600 to 0700 131:1220 to 1420 131:2310 to 0110 132:0300 to 0455 132:1040 to 1240 132:1625 to 2025 132:2025 to 2225 133:0240 to 0440 133:1055 to 1155 133:2030 to 2115 Orbital events: 2003:129:09:10:29.816 EPERIGEE 518 ORBIT PERIGEE 2003:130:16:53:49.844 EAPOGEE 519 ORBIT APOGEE 2003:132:00:37:54.087 EPERIGEE 519 ORBIT PERIGEE 2003:133:08:21:30.172 EAPOGEE 520 ORBIT APOGEE 2003:134:16:04:43.810 EPERIGEE 520 ORBIT PERIGEE 2003:135:23:48:26.521 EAPOGEE 521 ORBIT APOGEE 2003:137:07:32:19.216 EPERIGEE 521 ORBIT PERIGEE 2003:138:15:15:28.588 EAPOGEE 522 ORBIT APOGEE EVENTS ------ Status at AOS, 128:12:48, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 262.103 deg Dec = -14.290 deg ROLL = 98.807 deg Format = 2 OBSID = 4063 PDS 456 SIM FA = -467 SIM TSC = 74424 (ACIS-S) DITHER = ENAB HETG = IN ( 6.34 deg) LETG = OUT (77.96 deg) HRC-I HV is ON EPHIN Geom = LARG E150 = 0.4 E300 = 0.0 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 = 0.2280 mu-a Descending through 118910 km. ACIS focal plane temperature -119.4. 14:19 LOS. Status is essentially unchanged. Descending through 115153 km. ACIS focal plane temperature -119.4. NOTES/ISSUES/PROBLEMS Intermittent comm problems with DSS-16 during the current pass. A telecon yesterday afternoon on the subject of radiation zone predictions came to the concensus that while we indeed may be sampling new portions of geomagnetic space, the actual trips are due to space "weather." We made a concensus recommendation to return to our previous paradigm for perigee belt predictions and padtimes. From the 9am status meeting: Four supports over the last 24 hours. Problems with DSS-66 and DSS-16 resulted in a switch to DSS-27. All data recovered in a four hour pass. Last load segment for MAY0403C was uplinked, on-board loads good until 131:23:10. MAY1203C loads were approved yesterday, will get sign-off this morning. We are effectively running CAP 847 to assure ACIS safety during the upcoming SCO X-1 observation at 20:42 today. Current SIM and HETG position are correct. IRU 1A current has again become "steadily noisy" today. ASVT setup problems yesterday prevented testing of IRU swap products. Will try again tomorrow. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 4114 F17208-0014 127:00:47 ACIS-S NONE No obvious problems ------------------------------------------------------- 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 -------------------------------------------------------