VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BU027B Observer: Ulvestad, J. Project type: VLBA Obs filename: bu027bcrd.* Date/Day: 2003DEC29/363 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK GB =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is D. Pierce. VCLOCK and GPS Delta check okay. UT1-UTC: -0.39 0500 File begins. 0500-1501 *MK wea: at 2217 UT on Dec 28th, site tech reported WEA 100 601 that there was 4-6" of snow on the ground and 2-3" of snow covering 60% of the dish. Weather forecast was for snow to continue all night. Road to the site is closed. Contacted Array Operations Supervisor D. Medcalf. After informing him of the current and forecast weather conditions, he said to remove MK from observing. 0500-1501 *HN 4cm receiver is warming for coldhead 13063 50 300 replacement during tomorrows PM. Data is bad. 0500-1501 *FD TSMPLOTs show high system temperatures INT 38 228 at 13cm on channels 2,4,6, and 8. On channels 2 & 4 the high TSYS run from ~1100 UT to end of file. On channels 6 & 8 the high TSYS run from the beginning of observing through end of observing. 0500-1501 *KP Taking RFI on channels 1 and 2, 13cm. INT 12 72 0500-1501 *BR TSMPLOTs show high system temperatures INT 50 300 on all channels at 13cm. Especially bad on channels 1,3, and 7. 0500-1501 *SC BBC6 dead - CH06 data bad. 13069 13 78 0506 %KP WEA: Wind gusting in excess of 35 mph. 0536 Readbacks are okay. 0651 Readbacks are okay. 0821 Readbacks are okay. 0923-0929 *SC Autostowed. Power bump. Repointed. COM 100 6 0942-0946 *SC Autostowed. Power bump. Repointed. COM 100 4 0948 Readbacks are okay. 1047 Readbacks are okay. 1053 Readbacks are okay. 1130 Readbacks are okay. 1136-1139 *OV Cable was unwrapping,not on source. ACU 100 3 1228 SC WEA: Light scattered low clouds, dish is dry. 1302-1314 FD Ran out of tape, Site Tech enroute. HUERR 100 12 1320 Readbacks are okay. 1335 WebCam Update: SC -Scattered low clouds. HN,NL,FD - Clear. Other sites still dark. 1418 WebCam Update: NL - Mostly cloudy. LA,PT,KP - Clear. OV,BR - Still dark. 1435 New operator: T. Perreault 1448 KP wea: clear, no precipitation 1501 End. Downtime Summary: Total downtime : 1604 min Percentage downtime of observing: 26.7% Average downtime per hour : 16.0 min Total scheduled observing time (# Antennas): 6010 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.