VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BL149AM Observer: Lister, M. Project type: VLBA Obs filename: bl149amcrd.* Date/Day: 2007AUG24/236 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= 0419 Begin file VCLOCK check ok. SC at -0.157 UT1-UTC check ok (-0.16) GPS delta < 10us (MK: -8.7us) Operator: T. Perreault 0419-0417 *OV data bad between ~55-65deg EL. 21088 0419-0425 *FD Focus brake fault. Cleared with a FRM 100 6 MASTER CLEAR reset and positioned by re-reading current scan. 0419-0423 *PT AZ overspeed error. Disabled AZ axis, ACU 100 4 then got an EL overspeed error. Disabled EL axis both errors cleared. Enabled AZ and EL axises, pointed antenna. 0545 New operator is Betty Ragan. 0545 %SC raining. 0550 %NL tsys elevated. Looks like the weather is very cloudy, with storms in the area. 0619-0620 *MK focus drive fault. Did a master clear. FRM 100 1 0634-0635 *MK focus drive fault. FRM 100 1 0636 %LA raining. 0812-1035 *SC lost power, switched to generator. Antenna 21149 100 143 stowed. Now has "EL#2 blower/lubrication pump CB" and "EL#2 low lubrication pressure" errors. Removing it from the observation for now and calling site tech. 0832-0834 *MK focus drive fault. FRM 100 2 1138-1139 *MK focus drive fault. FRM 100 1 1211-1212 *MK focus drive fault. FRM 100 1 1224-1227 *PT stowed. Power glitch. COM 100 3 1232 FD reports high, thin cirrus clouds, dry conditions. 1345 New Operator is Alan Kerr 1458-1510 *NL Mk5 stopped recording. could not ONLINE it. site REC 100 12 tech had to reboot the Mk5. 1711-1718 *PT autostowed, power glitch COM 100 7 1927 %KP rain. 2026 KP rain stopped. 2135 New operator: T. Perreault 2150-2156 *PT autostowed. Power glitch. Repointed. COM 100 6 2227-2231 *PT autostowed. Power glitch. Repointed. COM 100 4 Looks like the B cryo compressor has shut down, contacted site tech. 2239 PT site tech reports that the B compressor pressures look ok and so do the cryos. 2251-2254 *PT autostowed. Power glitch. Repointed. COM 100 3 2258-2303 *PT autostowed. Power glitch. Repointed. COM 100 5 2327-2335 *PT autostowed. Power glitch. Repointed. COM 100 8 2359-0003 *PT autostowed. Power glitch. Repointed. COM 100 4 0000 Date is 2007AUG25/237. 0007-0024 *PT autostowed. Power glitch. Leaving out COM 100 17 for a bit to see if power settles down. 0026-0052 *PT autostowed again. Leaving out. COM 100 26 0046 %KP wea: raining, elevated system temperatures 0119-0127 *PT autostowed. Power glitch. Repointed. COM 100 8 0120-0128 *KP autostowed. Power glitch. Repointed. COM 100 8 0131-0138 *KP autostowed. Power glitch. Repointed. COM 100 7 0137-0140 *PT autostowed. Power glitch. Repointed. COM 100 3 0139-0201 *KP autostowed. Power glitch. Leaving out for COM 100 22 a bit. 0146 %FD wea: raining; site tech sent a heytech message a few minutes ago informing of thuderstorms in/around the site with high winds. 0233-0239 *PT autostowed. Power glitch. Repointed. COM 100 6 0356 MK observing ends 0417 End. Downtime Summary: Total downtime : 308 min Percentage downtime of observing: 2.1% Average downtime per hour : 1.3 min Total scheduled observing time (# Antennas): 14380 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.