[evlatests] Oct 20 Cband: Phase transfer

[Mike Revnell]

I found the deformatter acting up. Had to reset the formatter to fix it. 
This antenna/if seems to have a problem with this.

Mike.

Ed Fomalont wrote:
> Some initial results from the C-band data taken on Oct 20
>
> Observation summary:
>    2.6 hours, 12 telescopes, 5 sources,
>    four sub-bands, 4.6 -> 5.0 GHz
>
> Main reference source:  1310+323
> Other sources: 1326+319, 1331+305, 1330+251, 1327+221
>
> Major problem:
>
>    Telescope 8, pol L has a sinusoidal bandpass response with a period of
>    63+/-2 MHz.  It is like the true bandpass is rotated in phase with a
>    revolution every 63 MHz.
>
>    Other telescopes have reasonable sensitivity.
>
> Angular stretching of Sources:
>
>    The angular stretching of source positions away from the direction
> of the phase reference location is now very small
>
> Band    Date   Frequency Range       Stretching factor
> C     Sep 27   4.63 - 5.00           7.8^(-5) ± 0.3
> C     Oct 19   4.63 - 5.00           0.5^(-5) ± 0.3
>
> It is a more than a factor of 10 less than the C-band observations of
> Sep 27, and whatever remains could be caused by other effects such as
> the lack of round-trip phase or remaining elevation dependence of the
> phase.
>
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