VERY LONG BASELINE ARRAY OBSERVING LOG
--------------------------------------
Project:        BT094D
Observer:       Taylor, G.
Project type:   VLBA
Obs filename:   bt094dcrd.*
Date/Day:       2008FEB16/047
Ants Scheduled: SC HN NL FD LA PT KP OV BR MK

=UT-Time===Comment===============================================MF#===%AD==AMD=
           Operator is A. Sowinski.                                             
           UT1-UTC -0.32, gps delta and vclock okay.                            
          *KP Snowing, snow covering half of dish.                              
          %HN There is a little snow/ice in dish.                               
     0115  Begin, except at MK.                                                 
0115-0130 *KP Unable to get the FRM to move in rotation.         WEA    100   15
0119-0122 *NL FRM rotation motor foldback.                       WEA    100    3
0124-0125 *HN FRM rotation motor foldback.                       22193  100    1
           All these FRM errors are due to ice and snow.                        
0128-0135 *NL FRM rotation error.                                WEA    100    7
0130-1815 *Ending project at KP, completely unable to move the                  
           FRM in rotation.                                                     
0137-0138 *OV ACU motor current error, cleared.                  ACU    100    1
          *It is taking HN up to about a minute for the FRM at                  
           HN to get into position after most of the scan                       
           changes.                                                             
          *NL is usually about the same, sometimes worse.                       
     0152  Begin at MK.                                                         
0230-0435 *OV FRM Focus 2nd screw fault.                         22249  100  125
           Focus brake won't disengage, but position drifts                     
           over about 10 millimeters anyway.                                    
           I called the site tech and left a message, even                      
           though this this probably requires work on the FRM,                  
           which can't be done at night.                                        
           For a while, the FRM was stuck more or less in the                   
           2cm position, now it's drifted and isn't anywhere                    
           useful.                                                              
     0330  OV Site tech going to investigate.                                   
     0435  OV Fixed, for now at least.                                          
           It was an electrical problem, not mechanical.                        
     0437 *BR Precipitation.                                                    
     0554 *PT Snowing.                                                          
     0643  New operator is Heidi Gerhardt                                       
0700-1441 *FD unclearable focus brake fault, error ranges        FRM     80  368
           from 0-10 sometimes.                                                 
0705-1115 *NL is having a difficult time with locking on the     FRM     70  175
           correct rotation probably due to ice.                                
           I'm getting many frm errors, so I may take out if                    
           it doesn't get any better.                                           
     0827 *PT precipitation starting                                            
1115-1815 *NL taken out due to bad FRM errors probably caused    FRM    100  420
           by ice.  4.6F at dish very cold, bad for dish.                       
     1441  New Operator: Paul Padilla                                           
1441-1815 *HN FRM not making it to Rotation position for 4cm     FRM     33   70
           scans - FRM moving too slowly due to cold                            
     1700 %FD high winds                                                        
     1755  SC ends                                                              
     1815  End.                                                                 


Downtime Summary:
	Total downtime : 1185 min
	Percentage downtime of observing: 11.6%
	Average downtime per hour : 7.0 min

    Total scheduled observing time (# Antennas): 10200 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.