VERY LONG BASELINE ARRAY OBSERVING LOG
--------------------------------------
Project:      BC120AV
Observer:     Chatterjee, S.
Project type: VLBA
Obs filename: bc120avcrd.*
Date/Day:     2003JUL06/187
Ants Used:    SC HN NL FD LA PT KP OV BR MK 

=UT-Time===Comment===============================================MF#===%AD==AMD=
     1715  Begin file                                                           
           VCLOCK check ok. SC at -0.163                                        
           UT1-UTC check ok                                                     
           GPS delta < 10 us                                                    
           Operator: T. Perreault                                               
     1715  NL wea: raining                                                      
     1715  MK PCAL generator dead / turned off. No PCAL          11902          
           signal injected into the data path. Astronomical                     
           data are unaffected. If you use the PCAL signal to                   
           help calibrate your data, it won't be there.                         
1725-1734 *KP tape on recorder 1 dropped vacuum at the end of    11907  100    9
           tape on the first forward pass. I was able to                        
           reload the tape through the TAPE MOTION screen.                      
           I then started the tape moving in REVERSE, and the                   
           next source change started the tape moving FORWARD                   
           and over-writing some data on track 1 (~ 5 minutes                   
           worth). Tape stopped at the end of tape and went                     
           into REVERSE ok. TRACKUSE screen showed that TRACK                   
           ONE filled up. Footage counter looks ok, hopefully                   
           will have no more problems with the tape.                            
1821-1823 *KP tape on recorder 1 again dropped vacuum at the     11907  100    2
           end of tape. Brought up TRACKUSE screen to verify                    
           that the track usage was correct, brought up TAPE                    
           MOTION screen and did a LOAD command to the drive.                   
           Next source change the tape took off in the proper                   
           direction (reverse). Generated maintenance form                      
           so that the tape can be checked out when it comes                    
           back to the AOC for correlation.                                     
     1903  BR bad readback drive 2 track 4 - known               11856          
           readback problem, data are ok;                                       
           All other sites ok                                                   
1912-1914 *KP drive dropped vacuum with supply at about 500'     11907  100    2
           reloaded tape.                                                       
     1916  End.                                                                 


Downtime Summary:
	Total downtime : 13 min
	Percentage downtime of observing: 1.1%
	Average downtime per hour : 0.6 min

    Total scheduled observing time (# Antennas): 1210 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.