VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BO019B Observer: R. Ojha Project type: VLBA Obs filename: bo019bcrd.* Date/Day: 2005JAN27/027 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Jim Ogle. VCLOCK and gps delta checks okay. LA writing to Mk5 pack NRAO-043 in bank B. %Sitecam weather: mostly cloudy at SC and FD, clear at HN, NL, OV and MK, overcast with rain/snow at LA and PT, foggy conditions at KP and BR. *PT has snow in the dish, affecting Tsys values. 1727 Begin. 1727-1830 Readbacks at 1751, 1817 and 1827 UT all okay. 1847 MK Weather: Tech reports scattered cirrus. 1830-1930 Readbacks at 1854, 1919 and 1929 UT all okay. 2008-2009 *KP autostowed, commercial power glitch. Repointed. COM 100 1 2011 *LA reports heavy wet snow falling. 1930-2030 Readbacks at 2012 and 2021 UT all okay. 2046 *PT bad readbacks on track 4, drive #1. Other sites okay. 2056 Readbacks okay. 2108 KP reports broken low clouds. 2124-2127 *Dumping snow at LA, off source. WEA 100 3 2158 %Raining at FD. 2100-2200 Readbacks at 2123, 2132, 2142 and 2151 UT all okay. 2245 Operator is Sonja Mendoza. 2200-2300 Readbacks at 2259 UT, all sites okay. 2306-2309 *PT antenna not in point mode probably due COM 100 3 a power glitch. Repointed. 2300-0000 Readbacks at 2309, 2318, 2337, 2347 and 2356 UT OK. 0000 Day is 2005JAN28/028 0012 %LA WEA: precipitation starting, elevated system temperatures. 0015 Readback at MK okay. 0025-0027 *LA WEA: Dumping snow out of dish. WEA 100 2 0050 %FD WEA: occassionally gusty winds. 0048 Readback check okay at all sites. 0132 Readback check okay at all sites. 0142 Readback at MK okay. 0200-0300 Readbacks at 0215, 0224, 0244 and 0253 UT all okay. Readback at 0207 UT at MK only okay. 0300-0400 Readbacks at 0303, 0312, 0330, 0347 and 0357 UT all okay. 0400-0500 Readbacks at 0432 and 0441 UT all okay. 0500-0600 Readbacks at 0525, 0536 and 0545 UT all okay. 0600-0700 Readbacks at 0608, 0625 (MK only), 0631, 0634, 0643 and 0652 ok 0631 New operator: T. Perreault 0700-0800 Readbacks at 0701, 0712, 0734, 0754 ok at all sites *except: PT bad readback track 5 drive 1 at 0701 UT 0800-0900 Readbacks at 0802, 0811, 0821, 0831, 0840 ok 0900-1000 Readbacks at 0902, 0912, 0922, 0932, 0940, 0949 ok 1000-1100 Readbacks at 1030, 1039, 1048, 1058 ok 1100-1200 Readbacks at 1117, 1126, 1136, 1154 ok at all sites *except: SC bad readback track 14 drive 2 at 1126 UT 1158 SC wea: lightly scattered low clouds, no precipitation 1200-1300 Readbacks at 1200, 1210 ok 1300-1400 Readbacks at 1302, 1329, 1337, 1346, 1357 ok 1348 FD wea: scattered cumulus, no precipitation 1436 New operator is Jim Ogle. 1454 KP reports clear skies. 1400-1500 Readbacks at 1406 and 1441 UT okay at all sites. 1502 %BR reports overcast skies, low clouds, patchy fog. 1511 %LA reports scattered low clouds, 1" of snow on ground, probably some snow in dish. 1500-1600 Readbacks at 1501, 1510, 1527 and 1554 UT all okay. 1602 OV reports clear skies. 1603-1604 *SC az#2 armature over current fault; briefly AELEC 100 1 disabled AZ axis to clear error then re-enabled to resume pointing. 1621 Readbacks okay (only test this hour.) 1704 Readbacks okay. 1730 Readbacks okay. 1748 End. Downtime Summary: Total downtime : 10 min Percentage downtime of observing: 4.8% Average downtime per hour : 2.9 min Total scheduled observing time (# Antennas): 210 min (10) 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 = System Temperature (TP/SP x Tcal/2) ACU = Antenna Control Unit FRM = Focus/Rotation Mount RFI = Radio Frequency Interference VME = Site control computer CB = Circuit Breaker vclock = Program that compares site clock time to a standard.