[evlatests] Progress on WIDAR Imaging Woes

[Michael Rupen]

Hi folks --

   Eric reminds me that he gave a special UVFIX for Rick, which did
reproduce the uvw's given by the filler.  So the real question is whether
the antenna coordinates are correct...which (1) would not explain
the problems Ed & Rick see, and (2) would not (I assume!) give baseline-based
problems.

   So I think this is a red herring (sorry!), though I guess Rick might
have a look at his (VLA vs. WIDAR) data set...

             Michael

> Hi Ed --
>
>
>>  Has anyone checked to see if the u,v for antennas 25 and 28 are correct?
>
>
> Rick checked the uvw's, and I thought also compared UVFIX with the uvw
> from the filler.  Is this right, Rick?
>
>>  UVFIX does very bad things, even for the other good antennas.  This
>>  implies that the antenna positions in the data base may be in error,
>>  even if the u,v's are okay?
>
>
> The uvw's are generated from the antenna positions in the filler, so
> at the pre-CASA stage they were presumably OK.
>
> Obviously we should track this down however.  Vivek, Rick, have either
> of you compared UVFIX with "filled" uvw values?
>
>                  Michael
>
>
>