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<p>A simpler way to achieve the same would be:</p>
<p>1. For deriving R-L phases, use source model that includes known
effects of antenna pointing offsets (from pointing measurements)
and measured antenna aperture illumination patterns. This can be
done in CASA.</p>
<p>2. I am less sure here, but since the celestial source is
compact, I _think_ if the data is pointing offset-corrected before
deriving R-L phases, it will effectively achieve almost the same
as above.<br>
</p>
<p>sanjay<br>
</p>
<div class="moz-cite-prefix">On 3/30/22 10:47 AM, Steven Myers via
evlatests wrote:<br>
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If the explanation is geometric, then can we write an equation
mapping (AZ,EL) of the antenna and (HA,DEC) of the source,
including the various physical offsets, to the observed R-L phase,
and then solve for these offsets using the data in hand?<br
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