VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BO015B Observer: O'Dea, C. Project type: VLBA Obs filename: bo015bcrd.* Date/Day: 2003FEB14/045 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 0636 Begin file everywhere but MK which starts later. VCLOCK check ok. SC at -0.181 (ping 0.765 seconds) GPS delta < 10 us Operator: T. Perreault 0636-0631 *HN antenna is not operable due to excessive amount 10773 100 1435 of ice in the dish (3" covering appox 30% of dish). 0636-1521 *PT unclearable Focus faults / Focus 2nd screw fault 10846 100 525 with the subreflector. A MASTER CLEAR will get rid of the errors, but they come back as soon as the subreflector is commanded in Focus. Rotation movement is ok. Not observing with PT. 0636-0644 *BR tape head position error, it won't move. 10847 100 8 0638 New operator is Jim Ogle. 0644 *Switching BR to record on other tape drive. Tape VSN did not show up in logger messages, it is writing to tape EVNT0900. 0733 Begin at MK. 0737 %High wind gusts at MK. 0841 *FD bad readbacks on track 5, drive #1. *BR bad readbacks on most tracks, drive #1. Other sites okay. 0935 Readbacks okay. 1035 *BR bad readbacks on many tracks. Other sites okay. 1137 Readbacks okay. 1210 %SC reports overcast skies, low clouds. 1235 Readbacks okay. 1334 *BR bad readbacks on tracks 15, 17, 30 and 32. Other sites okay. 1442 New operators are Paul Dyer and Cyrus Reed. 1456 %KP reports overcast skies, fog, wet. 1504 %PT reports overcast, light snow and wet. 1510 %LA reports overcast, low clouds, wet. 1539 %OV reports cloudy skies, dry. 1532 All readbacks okay. 1609 %MK High wind gusts. 1625 %FD High wind gusts. 1635 *BR Bad readbacks on all tracks EXCEPT 02,06,08,18,20 22,24,27,29 1733 All readbacks OK. 1748-1840 *PT removed from observing for FRM repair. 10846 100 52 1758 *KP WEA: Light rain falling. 1831 Readbacks ok. 1910 *MK WEA: Ice and light snow, windy. 1918-1921 *FD Autostowed. Power glitch. COM 100 3 1930 All readbacks ok. 1958 *MK WEA: Snowing. 2029 All readbacks ok. 2104-2135 *MK Stowed antenna so that site tech can SYN 100 31 change out a synthesizer. 2123 *KP WEA: Overcast, low clouds. Fog. Wet. 2128 %PT Bad readback on drive 1, track 04. Others ok. 2154-2230 *MK Stowed antenna so that site tech can SYN 100 36 work on syn. 3. 2235 New operator: T. Perreault 2254-2256 *MK rebooting VME to clear tape terminate command OTHER 100 2 2256-0631 %MK dew point reading higher than air temperature. 2258 MK wea: rain, snow - icing conditions. Site tech wants us to watch motor currents. 2300 NL wea: light snow 2333 Readback check okay 0000 Date is 2003FEB15/046. 0004 OV wea: partly cloudy, no precipitation 0031 Readback check okay 0130 Readback check okay 0131-0631 %NL dew point reading higher than air temperature. 0229 Readback check okay 0326 MK 35+ mph wind caution 0334 Readback check okay 0512-0540 *BR put antenna into STANDBY due to the sources being SCH 100 28 close to zenith. The antenna is having to wrap / unwrap to reach sources. Sources are not being observed due to short scan durations (2 - 3 minutes) and the antenna is never reaching the source before being commanded to go to the next source, which is in the other wrap, resulting in a lot of strain on the AZ motors. Will monitor and repoint when the sources get below 80 degrees and/or the commanded AZ position is more or less in the same area. 0532 MK observing ends 0631 End. Notes: * = Entries where data was affected. % = Entries where data may have been affected. & = Entries where the site tech was called out. wea = Weather entries: MF# = Maintenance form or major downtime category associated with a problem. %AD = The percentage of an antenna affected by a problem. AMD = Total antenna-minutes downtime for a problem. Tsys = TP/SP x Tcal/2