To:sot_shift from: Dan Schwartz date: 02 Apr 03, 12:00noon EST Subject: SOT shift report 2003-04-02 L1350 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_02_2003_L1350.txt. Shift L1350. Start at 092:13:00 GMT = 08:00am 02 Apr EST End 12:00 noon 02 Apr SOT Lead DAS (Times will be given in GMT on day 092.) PLAN ---- Continue running load MAR3103C. Currently doing cti measurement at perigee egress. The remainder of the week will be a survey of the Northern NOAO Bootes Deep Field, with 5 ks ACIS-I observations. No comm this shift. Next Comms: 092:2110 to 2230 093:0200 to 0400 093:1200 to 1300 093:2010 to 2210 094:0600 to 0800 094:1315 to 1415 094:0030 to 0230 095:0945 to 1045 095:2030 to 2130 096:0100 to 0300 096:1100 to 1200 096:1615 to 2015 096:2100 to 2300 Orbital events: 2003:093:16:23:18.068 EAPOGEE 505 ORBIT APOGEE 2003:095:00:07:10.082 EPERIGEE 505 ORBIT PERIGEE 2003:096:07:51:31.750 EAPOGEE 506 ORBIT APOGEE 2003:097:15:36:00.190 EPERIGEE 506 ORBIT PERIGEE EVENTS ------ Status at LOS, 092:09:56, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 315.999 deg Dec = 34.002 deg ROLL = 72.931 deg Format = 2 OBSID = 60891 ACIS CTI SIM FA = -535 SIM TSC = -99616 (HRC-S) HETG = OUT (79.46 deg) LETG = OUT (77.96 deg) HRC-S HV is ON EPHIN Geom = LARG E1300 = 2089.4 LT 10.0 (RADMON P4GM = 10233.1 LT 300. DISABLED) P41GM = 11.3 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.4760 mu-a Ascending through 32995 km. ACIS focal plane temperature -114.7. NOTES/ISSUES/PROBLEMS From the 9am status meeting: Three supports, including the DSS-34 test support. The latter used all data rates, and ran a mini dark current calibration using VC2, via CAP 836. APR0703A products expected out this morning for a load review today. The review may be later than 2pm depending on when the products actually go out. Due to high momentum buildup by the end of the week, reaction wheel speeds are again expected to dip into the 400 - 500 rpm range. Recovery from the UPS failure is largely complete. The third string is still in work and expected to be out until tomorrow morning. The SOT recognized yesterday that during the Monday night router failure at the OCC, that any emails sent to the SOT_ alert lists would have stalled when they hit an address served by that router, and thus would not have been properly delivered. We therefore have an action to create a procedural backup to notify someone who can monitor the necessary data, for example the ACE proton rates, in such a situation when we cannot count on the automatic notification process. Dan Shropshire showed some preliminary analysis of the day 89 MUPS firing. The main (preliminary) conclusion is that current signatures were seen for each expected firing of the valve drive electronics, so that system would be exonerated as the cause of the MUPS anomaly. Both thrusters 1 and 2 showed initial 100% thrust, dropping off after 300 to 500 seconds. This is perhaps slightly different in detail from the original Dec 22 incident, but further analysis, e.g. of temperatures, remains to be done. Quick look data: Target Comment ----- ------ -------------- ------- NOAO Bootes fields F33, SS25, SD39, SS42, F49, F12, F58, SS21, SD51, SS4, SS12, F64, F18, F37: 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 -------------------------------------------------------