VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BM209B Observer: Marcaide, J.M. Project type: VLBA Obs filename: bm209bcrd.* Date/Day: 2004AUG19/232 Ants Scheduled: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Cyrus M Reed. VCLOCK and GPS DELTA OK. UT1-UTC OK (-0.45). WEA: Cloud cover via webcam: WEA: MK Clear skies. WEA: Other sites unknown (night). WEA: No recent precipitation at any site. 0400 Begin observing. All antennas on source. 0400-0400 %MK: Intermittent 2cm Left FET#1 voltage out of 14540 range warnings. Known problem. 0403 %OV WEA: Wind gusts > 35MPH. 0506 All readbacks OK. 0545 New operator is Paul Dyer. 0727 All readbacks ok. 0825 All readbacks ok. 0832-0833 *OV AZ#1 armature over current. AZ disabled ACU 100 1 for a few seconds to clear the fault. 0922 all readbacks ok. 0927 All readbacks ok. 1046 All readbacks ok. 1147-1149 *PT Autostowed. Power glitch. COM 100 2 1205 All readbacks ok. 1309-1312 *KP Autostowed. Power glitch. COM 100 3 1335 %MK Bad readback on drive 2, track 04. All others were ok. 1350 New operator is Jim Ogle. 1356 Sitecam weather: clear to mostly clear conditions at all sites (MK unknown, still dark there.) 1403-1405 %KP internet communications dropped out; VME may not 14579 100 2 be writing monitor data to disk when comm drops so we may have lost the data during this time while I switched over to dial backup. 1427 BR reports high thin scattered clouds. 1430 Took KP off dial backup, internet connection is back up. 1435-2016 %PT dew point reading higher than air temperature; 14628 pointing equation may be affected. 1439 KP reports scattered low clouds. 1456 OV reports clear skies. 1500 %Raining at FD. 1508 Readbacks okay. 1707-1709 *SC went out of point, commercial power glitch. COM 100 2 Repointed. 1708 Readbacks okay. 1833-1834 *FD focus position error; had to do a master FRM 100 1 clear then resend position to get it to move. 1843 MK reports scattered cirrus clouds. 1856-1857 *OV AZ#1 armature overcurrent fault. Disabled AZ AELEC 100 1 axis to clear error then re-enabled to resume pointing. 1909-1910 *PT autostowed, commercial power glitch. COM 100 1 1912-1913 *PT autostowed again. COM 100 1 1915 %LA overcast skies, elevated Tsys values. 1937 %PT got replacement part for weather station, will 14628 be taking station down to install it. 2018 %High wind gusts at MK. 2043 %High wind gusts at PT. 2107-2109 *SC autostowed, commercial power glitch. Repointed. COM 100 2 2127 %LA reports thunderstorms in the area. 2128 KP reports scattered low clouds. 2132 %Raining at LA. 2145 New operator is Cyrus M Reed. 2154 All readbacks OK. 2200 WEA: Cloud cover via webcam: WEA: SC Cumulus (25%). HN Stratus (100%). WEA: NL,FD Altostratus (80%,5%). WEA: LA Stratocumulus (95%). PT Cumulus (30%). WEA: KP,OV Cumulus (65%,45%). BR,MK Clear skies. WEA: Recent precipitation at LA, other sites dry. 2252 %OV WEA: Reports active thunderstorms in area. 2314 MK WEA: Reports scattered cirrus. 0000 Date is 2004AUG20/233. 0017 All readbacks OK. 0143-0150 *KP Major power failure. Waiting for power to COM 100 7 stabilize before repointing antenna. 0252 All readbacks OK. 0401 End. Downtime Summary: Total downtime : 23 min Percentage downtime of observing: 0.2% Average downtime per hour : 0.1 min Total scheduled observing time (# Antennas): 14410 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.