VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BJ064 Observer: Jackson, N. Project type: VLBA Obs filename: bj064crd.* Date/Day: 2007DEC08/342 Ants Scheduled: HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Betty Ragan UT1-UTC is good for all stations. Vclock (0.730) and gps delta (9999.9) are off for PT, OK for other stations. 2333 Begin. 2333 %NL has had recent snow. May still be flurries. 2333-0200 *PT UPS battery alarm is going off. VME keeps 21850 100 147 going down. It came back up again before the job started, but I am removing it from observing until the site tech can get there. The station clock appears to be off (hence the gps delta reading mentioned above), and there are formatter MCB errors and many errors involving the BBCs. 2333 %MK tsys are high. Ice and snow on the antenna. 2355-2356 MK elevation motor current sum is high (~22-24). ACU 100 1 Putting it in standby briefly, just to see if that helps it any. 0000 Date is 2007DEC09/343. 0001 MK elevation moter currents are about the same, probably due to the ice, but are not getting any worse. 0029 %LA raining. 0200-1843 *Site tech at PT has reset the clock, and I've 21851 100 1003 put it back into the project, but we're still getting "Station time differs from GPS" errors. 0233 Operator is Anthony Sowinski. 0234 PT has an intermittant 1 second difference between station and gps time. May or may not be real, and in any case should go away once the "BATT V" voltage is recharged to at least 27.0 volts. 0433-0434 *HN Antenna put in Standby to clear elevation motor ACU 100 1 current warning. 0447-0449 *HN High motor currents again. ACU 100 2 0834-0837 *PT Formatter HC1 FIFO errors. 21522 100 3 1022 OV Windy. 1442 New operator is Betty Ragan. 1443 %KP raining. 1539-1540 %PT HC1 FIFO errors. Cleared. 21522 100 1 1811 PT maser voltage is now at 26.92 and does not seem to be increasing. Everything else on it looks fine, but we are still seeing the same error messages and the frequent 1 second difference on the GPS screen. Have consulted with Adrian Rascon, and he believes these are probably not real errors. Further investigation is pending. 1843 Further investigation concluded that the PT errors were in fact real errors, and that the VME clock needed to be resynced to the maser. This has now been done. Data recorded during the time the errors were occurring may not be recoverable. 1906-1907 *PT out of point. Probably a power glitch. COM 100 1 2331 End. Downtime Summary: Total downtime : 1159 min Percentage downtime of observing: 9.0% Average downtime per hour : 5.4 min Total scheduled observing time (# Antennas): 12942 min (9) 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.