[evlatests] Quasi-calibrated visibilities and weights!

[Rick Perley]

    It appears some troubles (most hidden from public view! :) 
concerning proper application of the 'switched power' quantities are now 
behind us.   The raw visibilities and weights offered by BDF2AIPS, after 
passing through Eric's latest version of TYAPL, are now in real Jy 
(visibilities) and (1/Jy)^2 (weights), as they should be. 

    One nice advantage of this is that we can quickly find antennas 
whose TCals or presumed efficiencies are 'out of line'. On a short test 
database taken at noon today, of 3C454.3 at Ka-band, the post-TYAPL 
visibilities are mostly near the correct value  of 38 Jy, but three 
antennas are far away:  Antennas 17 and 26 give visibilities which are 
much too low, and antenna 14 gives visibilities which are much too 
high.  For the former, either the listed TCals are too low, or the 
presumed antenna efficiency is too high.  For the latter, the inverse 
applies.