[evlatests] WIDAR bronze dataset - C band dual pol.

[Ed Fomalont]

Noisy data can be used.  It might be useful to determine the rms for 
each baseline with an interval of, say, 10 minutes.   Whether this data 
is noise or the visibility data minus the best source image does not 
matter.   See if these baseline rms values close.  i.e. is the rms error 
for baseline NxM equal to the rms sum of the antenna N + antenna M rms 
error.  This could isolate baseline problems.  I've done this in the 
past, but I don't think there is convenient software around.  The task 
CORER (if it still exists) may be a start here.

Ed