VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BC135A Observer: Cotton, W.D. Project type: VLBA Obs filename: bc135acrd.* Date/Day: 2003APR25/115 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 1559 Begin file VCLOCK check ok. SC at -0.190 GPS delta < 10 us Operator: T. Perreault 1559-2359 *BR system temperatures channels 1 & 2 (43125.74 MHz) OTHER 50 240 are more than double that of channels 3 and 4 (42823.72 MHz). 1648 SC Cryo compressor B seems to have shut down. Called site tech, he will see what is the problem. 7mm DEWAR unaffected. 1653 Readback check ok 1724 Readback check ok 1736 SC Cryo compressor B supply and return are back to normal levels. 13cm,6cm,2cm, and 1cm DEWARs are cooling down. 1748 Readback check ok 1802-1807 *OV 55+ mph wind gust caused antenna to autostow. WEA 100 5 1810-1815 *OV stowed in 55 mph gust again. WEA 100 5 1835 *LA bad readbacks: Drive 2, Tracks 03,05. All others OK. 1845-1849 *OV autostowed due to 55mph wind gust. WEA 100 4 1856-1857 *OV autostowed due to 55mph wind gust. WEA 100 1 1859-1900 *OV autostowed due to 55mph wind gust. WEA 100 1 1913-1918 *OV autostowed due to 55 mph wind gust. WEA 100 5 1931 Readback check ok 1932 MK wea: clear, light wind, no precipitation 1935 Upgraded azimuth pointing parms for 7mm at HN. 2020 Readback check ok 2027 *MK wea: overcast, light rain 2044-2109 *OV autostowed due to 55 mph wind gust. WEA 100 25 Repointed, got on source at 2050 UT and then auto- stowed again in less than a minute. Will leave out for a bit to see if winds taper off. 2108 Readback check ok 2125 KP wea: clear, no precipitation 2131-2136 *FD autostowed. Power glitch. Repointed. COM 100 5 2132 Readback check ok 2143 New operator is Jim Ogle. 2152-2153 *OV autostowed, wind gusts. WEA 100 1 2155 Readbacks okay. 2220 Readbacks okay. 2243 OV reports cloudy skies, windy. 2244 Readbacks okay. 2250 Readbacks okay. 2310 Readbacks okay. 2334 Readbacks okay. 2359 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