[evlatests] Antenna IDs and UV Coords O.K.

[Rick Perley]

    I have an observation of 0217+738 taken with the VLA and its 
correlator, and another one, taken the preceding day at the same HA with 
the EVLA. 

    I have already noted that the UV coverages of each are the same.  
But that was a global statement -- I plotted all baselines at once. 

    I have now reviewed these two databases in detail.  The individual 
antenna pairs (baselines) are in the same positions for each of the two 
databases.  Hence, the antenna labels and the (uv) coordinates 
associated with each baseline, are correct. 

    I claim that the actual visibilities attached to each baseline are 
wrong -- they belong to another pair.    Such a scrambling would 
certainly account for all the problems we've seen in imaging the low 
frequency (L and C band) datasets, and would also account for why the 
X-band observations of 0217+738 have been so good -- nothing else in the 
field, so it doesn't matter where the visibilities are gridded.