[Radioig] ObsCore extension last news

[Mark Kettenis]

> Date: Wed, 8 Nov 2023 20:55:17 +0100
> From: BONNAREL FRANCOIS <francois.bonnarel at astro.unistra.fr>
> 
> Dear all,

Hello Francois,

> 2 )
> https://wiki.ivoa.net/internal/IVOA/ObsCoreExtensionForRadioData/ADQLusecasesForObsCoreExtensionForRadioData.pdf

Thanks.  It is good to have these ADQL examples.  But I think we need
a scientific use case associated with these ADQL examples as well.  I
still think the current set of additional columns is larger than it
should be as there is overlap between e.g. the ones that characterize
the uv coverage and the ones that characterize the field of view
and/or resolution.  I think we should drop the ones for which we do
not of have a scientific use case (including an ADQL example).

Another somewhat questionable example is use case 1.10.  The minimum
number of antennas for a "good" observation really is
instrument-specific and the maximum distance between antennas really
is just a very poor way of expressing a resolution or uv-coverage
constraint for which we already have columns.  So unless someone can
come up with a scientific use case for these parameters, I think they
should be dropped from the extension.

Thanks,

Mark