VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BL104V Observer: Lobanov, A. Project type: VLBA Obs filename: bl104vcrd.* Date/Day: 2005JAN19/019 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Sonja Mendoza. LA writing on Mark5 disk pack NRAO-011, bank B. Vclock, GPS delta, and UT1-UTC time checks all okay. WEA: BR has 2-3 inches snow, about 1 inch of snow covers 10% of dish. WEA: Gusty winds at MK,SC,FD,OV. WEA: SC has light scattered clouds, no precipitation. WEA: HN Very cold (-18C), low clouds, no precipitation. 1350 Begin observation. 1359 %HN: Bad readback on track 17, drive 1. %FD: Bad readback on tracks 4,5 drive 1. All other sites okay. 1410 WEA: FD scattered cumulus, no precipitation. 1414 Readback check okay at all sites. 1444 New operator is Jim Ogle. 1500 Readbacks okay. 1505 KP reports clear skies. 1515 LA reports clear skies. 1517 %BR reports overcast skies, low cloud cover. 1517-1518 *SC rotation drive fault. FRM 100 1 1523 Readbacks okay. 1546 Readbacks okay. 1608 OV reports clear skies. 1610 Readbacks okay. 1625-1627 *SC rotation position error. 15359 100 2 1639-1641 *SC rotation position error. 15359 100 2 1647-1655 *SC rotation west motor over speed fault. 15359 100 8 1724-1726 *SC rotation position error. 15359 100 2 1744 End. Downtime Summary: Total downtime : 15 min Percentage downtime of observing: 0.6% Average downtime per hour : 0.4 min Total scheduled observing time (# Antennas): 2340 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.