VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BG169A Observer: Greenhill, L. Project type: VLBI Obs filename: bg169acrd.* Date/Day: 2007JAN31/031 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK Y GB =UT-Time===Comment===============================================MF#===%AD==AMD= Operators are Betty Ragan and Jim Ogle. *LA snowing. %MK high winds. Vclock, UT1-UTC, gps delta checks OK. 0338 Begin at GB. 0346 Begin at all VLBA stations. 0355 Begin at Y. 0355-1334 *Y channel 1 low total power readings, appears to OTHER 7 40 be on the bandwidth edge. TSMPLOT shows no data at all for channel 1. 0454 *FD snowing. 0556-0559 *FD autostowed. Power glitch. COM 100 3 0544-1430 *FD BBC1 intermittently losing lock. 19769 1 5 0645 New Operator: Paul Padilla 0810 %LA Precipitation 0817 %HN reports dew point > temp by ~1 degree 1118 %PT Precipitation 1235 %LA Precipitation 1300 %SC Precipitation 1318 %KP Precipitation 1334 Y ends 1346 %FD Site Tech reports overcast skies, fog, and damp conditions 1427 SC ends 1430 End. Downtime Summary: Total downtime : 48 min Percentage downtime of observing: 0.7% Average downtime per hour : 0.4 min Total scheduled observing time (# Antennas): 7172 min (11) 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.