VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BE043B Observer: P.G. Edwards Project type: VLBA Obs filename: be043bcrd.* Date/Day: 2005DEC10/344 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Jim Ogle. HN writing to Mk5 disc pack NRAO-036 in bank B. FD writing to Mk5 disc pack NRAO-081 in bank A. LA writing to Mk5 disc pack NRAO-095 in bank A. PT writing to Mk5 disc pack NRAO-123 in bank A. KP writing to Mk5 disc pack NRAO-023 in bank A. MK writing to Mk5 disc pack NRAO-133 in bank A. VCLOCK and gps delta checks okay. %High wind gusts at MK. 0946-0950 *SC started writing data to tape as soon as the file loaded instead of waiting for the first write scan to begin. If VLDIS is to be believed, it is also overwriting data on a previously used track. 0950 *Trying to stop SC from recording not working, rebooted site computer and was then able to manually stop tape. Not sure what effect this will have on which track it will write to when it starts up. About 3000 feet of track 2 on tape VLBA0235 may have been overwritten. 0955 Begin. 0955-1453 *BR: not fringing, data not usable. 17390 100 298 0956 SC is writing to the correct track (11) this time. 1000 Readbacks okay. 1117 *BR bad readbacks on track 31, drive #2. 1133 Readbacks okay. 1239 *OV bad readbacks on tracks 4, 5, 8, 9, 11, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32 and 33 on drive #1. Other sites okay. 1257-1258 *BR AZ#2 low lube pressure flag. Put antenna in ACU 100 1 standby to check if it was real. Error went away so I resumed pointing. Flag intermittently appeared and disappeared for a few more minutes before stopping. Site tech reported yesterday that it is not a real problem when it does this, it's a problem that occurs when the temperature is low. 1309 &NL site tech called out, site is about to run out HUERR of tape. Tech says he had calculated he had enough tape to finish project. 1312-1331 *NL out of tape. HUERR 100 19 1403 *OV bad readbacks, almost every track. Switching over to tape on other drive (only one track left anyway.) Other sites okay. 1406-1407 *BR AZ#2 low lube flag again. Wasn't going away ACU 100 1 so I put it in standby again, error cleared and did not reappear when I repointed. 1442-1443 *BR in standby briefly again to clear the low ACU 100 1 lube flag again. 1450 Operator is Sonja Mendoza. 1453 End. Downtime Summary: Total downtime : 320 min Percentage downtime of observing: 10.4% Average downtime per hour : 6.3 min Total scheduled observing time (# Antennas): 3070 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.