VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BC120DU Observer: S. Chatterjee Project type: VLBA Obs filename: bc120ducrd.* Date/Day: 2004MAR31/091 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Jim Ogle. %Raining at MK. %GPS delta checks okay; VCLOCK okay except at SC where excessive ping time is causing what is probably incorrect Clk-UTC results. 1135 Begin. 1135-1336 *MK showing RFI at channels 7 and 8, 1683.99 MHz. 13717 25 30 This RFI frequency is not among the known problems for MK. 1146 SC reports clear skies. 1244-1245 *BR EL brake fault. Disabled EL axis to clear error ACU 100 1 then repointed. 1252 %Raining at HN, possibly sleet or snow. 1321 %HN reports overcast skies, low clouds, moderate rain. 1336 End. Downtime Summary: Total downtime : 31 min Percentage downtime of observing: 2.6% Average downtime per hour : 1.5 min Total scheduled observing time (# Antennas): 1210 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.