VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BC120BT Observer: S. Chatterjee Project type: VLBA Obs filename: bc120btcrd.* Date/Day: 2003SEP17/260 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Paul Dyer. VCLOCK, GPS Delta, and UT1-UTC check ok. 1158 Begin. 1158-1358 *BR Broken AZ idler wheel bearing. Antenna can 12421 100 120 not be pointed. 1232 WEA: Web cams show partly cloudy at SC; clear at HN,NL,and FD. Still dark elsewhere. 1335 New Operator is Dave Pierce. 1351 LA WEA: Scattered high clouds. 1358 End. Downtime Summary: Total downtime : 120 min Percentage downtime of observing: 10.0% Average downtime per hour : 6.0 min Total scheduled observing time (# Antennas): 1200 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.