VERY LONG BASELINE ARRAY OBSERVING LOG
--------------------------------------
Project:        BB231D
Observer:       Braatz, J.A.
Project type:   VLBI
Obs filename:   bb231dcrd.*
Date/Day:       2006DEC30/364
Ants Scheduled: SC HN NL FD LA PT KP OV BR MK GB EB 

=UT-Time===Comment===============================================MF#===%AD==AMD=
     0405  Begin file                                                           
           VCLOCK check ok. BR at 1.569 (pint 3.082 seconds)                    
           UT1-UTC check ok. (0.04)                                             
           GPS delta < 10 us                                                    
           Operator: T. Perreault                                               
          *Possibly heavy amounts of snow in dishes at LA and                   
           KP. PT and BR probably also have some snow.                          
0405-1357 *FD not observing. Broken AZ#1 drive axle.             19601  100  592
     0405  SC when antenna was initally pointed, got high (40                   
           amps +) EL motor currents on both EL#1 and EL#2                      
           motors. Disabled and re-enabled the EL axis, high                    
           currents continued. Put antenna into STANDBY and                     
           then repointed, high currents continued. Stowed                      
           antenna and contaced oncall site tech. As I was                      
           showing Betty (Correlator Op) what happened, I                       
           repointed the antenna and the EL motor currents                      
           were perfectly fine. Contacted oncall tech again,                    
           he said that there has been problems with the EL                     
           motors a week or so ago and to call back if there                    
           were any more problems.                                              
     0405 %LA and KP EL motor current sums intermittantly going                 
           over 20 amps due to snow in dishes from winter                       
           storm. Current sums are about 25 amps.                               
     0405  PT sporadic building UPS battery alarm; suspect                      
           transient power glitches.                                            
     0647  New operator is Jim Ogle.                                            
     0653 %Putting MK antenna into Standby mode to save wear                    
           and tear on motors, sources are all below the                        
           horizon for another 40 minutes.                                      
     0702 *Snowing at LA.                                                       
     0728  Repointing MK, source rising finally.                                
0830-0833 *Dumping snow at LA.                                   WEA    100    3
0846-0847 *PT autostowed, commercial power glitch. Repointed.    COM    100    1
1146-1149 *Dumping snow at LA.                                   WEA    100    3
1343-1357 *LA elevation motor currents are getting too high      WEA    100   14
           due to the growing snow load in the dish. Ending                     
           observing there.                                                     
     1357  End.                                                                 


Downtime Summary:
	Total downtime : 613 min
	Percentage downtime of observing: 10.4%
	Average downtime per hour : 6.2 min

    Total scheduled observing time (# Antennas): 5920 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.