VERY LONG BASELINE ARRAY OBSERVING LOG
--------------------------------------
Project:        BM273A
Observer:       McClintock
Project type:   VLBA
Obs filename:   bm273acrd.*
Date/Day:       2008JAN07/007
Ants Scheduled: SC HN NL FD LA PT KP OV BR MK

=UT-Time===Comment===============================================MF#===%AD==AMD=
     1530  Begin file                                                           
           VCLOCK check ok. SC at -0.181                                        
           UT1-UTC check ok                                                     
           GPS delta < 10us (FD: -5.6us)                                        
           Operator: T. Perreault                                               
1530-1914 *SC subreflector unable to be moved - FOCUS            21989  100  224
           brake is locked up and won't release.                                
           Antenna not observing.                                               
     1530  OV having high ACU voltages, when file started                       
           there was an EL brake fault condition. Will                          
           monitor, contact site techs about the problem when                   
           they arrive.                                                         
     1530  KP wea: high winds, antenna has autostowed once                      
           already; fog, light rain and drizzle                                 
     1547 %BR wea: low overcast, snowing - dish 100% covered                    
           with about 2" of new snow; 20cm window covered.                      
1600-1739 %PT seeing elevated system temperatures                22012  100   99
           Have been seeing sporadic high TSYS across multiple                  
           observing files at 4cm, however there is nothing                     
           consistant - some 4cm files are perfectly fine,                      
           others have the elevated TSYS. When the elevated                     
           TSYS do happen, they rise (or fall) gradually.                       
           Baseband switched power is low and autolevels are                    
           being driven negative as if something is saturating                  
           the signal.                                                          
     1613  OV wea: clear, no precipitation                                      
     1704 %LA wea: snowing, 2.5" on ground, dish 100% covered                   
1739-1806 *PT stowed so site tech can do some investigating      22012  100   27
           on the 4cm TSYS problem.                                             
1806-1914 %PT TSYS slightly lower but still higher than          22012  100   68
           what they should be.                                                 
     1914  End.                                                                 


Downtime Summary:
	Total downtime : 418 min
	Percentage downtime of observing: 18.7%
	Average downtime per hour : 11.2 min

    Total scheduled observing time (# Antennas): 2240 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.