[evlatests] Polarization, continued

[Rick Perley]

    I have reviewed the x-band polarization characteristics from my long 
observations taken in October.  These data were taken in the same 
configuration, and at the same band, as those taken in December, which 
have given the very peculiar results for antennas 14 and 15, recently 
reported.

    The data from October show *none* of these odd problems.  Antennas 
14 and 15 behave like all the others. 

    So -- what is different?  One thing, primarily:  The October data 
were taken in continuum, 50 MHz.  The December data were taken in 
polarization spectral line mode, at 12.5 MHz. 

    Anybody have any clue as to how the PA mode can muck up the antenna 
polarizations, for a few antennas?