VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: C041B Observer: Krichbaum, T. Project type: VLBI Obs filename: c041bcrd.* Date/Day: 2004APR19/110 Ants Scheduled: HN NL FD LA PT KP OV MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Dave Pierce. VCLOCK and GPS Delta check okay. UT1-UTC: -0.45 2027 File begins at all sites. *HN Wind gusts > 35 mph. 2027-1134 %MK 3mm a bit warm, coldhead needs replacement. 13791 25 226 Webcam Weather Update: HN,FD,LA,MK - Partly cloudy. NL,KP,OV - Clear. PT - Overcast. 2035 ok 2051 ok 2106 ok 2135 New operator is Paul Dyer. 2136 All readbacks ok. 2206 All readbacks ok. 2221 All readbacks ok. 2235 All readbacks ok. 2250 %NL Bad readback on drive 1, track 07. 2254 HN Comm has been down for 2 hours. Site tech is monitoring the observation from there and Gene Runion is talking to ATT about the problem. 2320 All readbacks ok. 2332 *PT WEA: Wind gusts > 35mph. 2335 All readbacks ok. 2351 All readbacks ok. 0000 Date is 2004APR20/111. 0026 HN Communication has been restored via modem backup. The old monitor data has downloaded and everthing looks ok. 0035 All readbacks ok. 0051 All readbacks ok. 0105 All readbacks ok. 0136 All readbacks ok. 0150 All readbacks ok. 0205 All readbacks ok. 0236 All readbacks ok. 0251 All readbacks ok. 0306 All readbacks ok. 0321 All readbacks ok. 0327-0332 *HN Autostowed. Power glitch. COM 100 5 0333-0341 *HN Autostowed. Power glitch. COM 100 8 I repointed at 0334 but it autostowed again before getting on source. I will wait a few minutes and try again. Seems to be a storm in the area. Wind gusta are > 35mph. 0355 All readbacks ok. 0416 All readbacks ok. 0435 All readbacks ok. 0506 All readbacks since last entry were ok. 0525 All readbacks since last entry were ok. 0532 New operator: T. Perreault 0600 All readbacks since 0525 UT were ok 0620-0623 FD VLDIS indicated a loss of intranet comm OTHER 100 3 with this site at 0616 UT. Did a traceroute, could reach station VME, was able to ping ok. Opened up SCREENS at the site, when I attempted to bring up the ACU screen it was blank and I could not disconnect the SCREENS package. Sent a reboot command. 0600-0700 Readbacks past hour ok at all sites except: HN bad readback drive 2 (tape EVNT0581) track 3 at 0636 UT 0700-0800 Readbacks past hour ok at all sites 0820-0821 *OV AZ#1 armature over current error message ACU 100 1 cleared by momentarily disabling the AZ axis 0800-0900 Readbacks past hour ok at all sites 0900-1000 Readbacks past hour ok at all sites except: KP bad readback drive 1 (tape HST00121) track 3,5 at 0955 UT 1000-1100 Readbacks past hour ok at all sites 1100-1134 Readbacks in this duration were ok at all sites 1134 End. Downtime Summary: Total downtime : 243 min Percentage downtime of observing: 3.3% Average downtime per hour : 2.0 min Total scheduled observing time (# Antennas): 7256 min (8) 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.