[evlatests] u,v,w, and UVFIX

[Walter Brisken]

Perhaps we should (re)consider this not only for the EVLA but for the VLBA 
as well.  A goal should be to use the same delay and uvw models for the 
two instruments.  With the upcoming software correlator we will be able to 
do more wide-field VLBI and the same issues we have with wide-field VLA 
will come up there.  Does the VLBA calc server already do these 
corrections?

My personal opinion is that the UVWs should be in J2000 coordinates (if 
that is the right way to put it) like everything else, meaning the 
aberation correction needs to be done.  This will make high dynamic range 
imaging using multiple configurations more likely.

-Walter

On Thu, 9 Aug 2007, Barry Clark wrote:

> Ed Fomalont <efomalon at nrao.edu> wrote:
>
>> I think it was agreed many years ago to not change the u,v,w
>> calculation on line.
>
> This was because the Modcomp debugging environment is rather difficult
> for such small effects; plus, there is the necessary increment in the
> record version number, and propagating to all users just what that meant.
> The environment is rather better now, and perhaps we should reconsider.
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.cv.nrao.edu
> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
>