[evlatests] AJ337 report

[Rick Perley]

    3.6cm, 50 MHz continuum, 10 second (!) averaging. 

    Antenna 11 out.  Antenna 25 mistakenly left in (it's in the barn) -- 
remarkably, the data are flagged as good! 

    On the first (calibrator) scan, antennas 5, 9, 12, 20, 22, 27 and 28 
all give zero amplitudes, which are not flagged as bad.  This shouldn't 
be an unwrap problem as (I thought) the 'on-source' flagging is 
working.  No idea what went wrong here, and the operator didn't note 
anything amiss either.  The problem is confined to this scan only, so 
there's no harm. 

    Antennas 13 and 18 were occasionally flagged as bad, but look good 
in the unflagged data. 

    The occasional correlator problem noted last week -- IF 'D' on a 
subset of baseline pairs, give huge and incorrect amplitudes, with 
phases always at 0, 90, 180, or 270 -- occurred throughout this run.  
Only a small fraction (few percent) of the data are ruined, and the bad 
data are easily removed.  This is clearly a correlator fault. 

    Otherwise, everything looks pretty good after a cursory inspection.