VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BB070 Observer: K. Blundell Project type: VLBA Obs filename: bb070crd.* Date/Day: 1997APR27/117 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Jim Ogle. HN clear skies FD overcast skies, light rain LA overcast skies, light rain PT cloudy skies OV cloudy skies BR high thin clouds 0401 Begin. 0402-0552 *MK head positioning error, won't move from 0.0 21204 100 110 0408 &MK tech called out. 0432 %jansky disk full, monitor data may get lost before space is cleared. 0437 %jansky space cleared, monitor data being saved again. 0552-0610 *Observing at MK stopped while tech fixes drive. 21204 100 18 0610-0621 %MK restarted. Tape footage counter messed up and 21204 100 11 tape is out of position. 0613 *MK tape footage reset to match takeup value. Tape is about 5000 feet out of position. 0621 *Rewinding tape at MK to try and get it properly positioned before start of next pass. 0622-0641 %MK tape still about 3000 feet out of position, it 21204 100 19 will end this pass prematurely. 0639-0647 *BR computer crashed. SW 100 8 0641-0645 *MK at end of pass early. 21204 100 4 0647-0708 %BR running again, tape only about 500 feet out of SW 100 21 position. 0708 %Rewinding BR tape to get it positioned correctly. 0929 End at all VLBA sites. VLA ends at 0949. 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 = TP/SP x Tcal/2