[Difx-users] FITS Card format? {External}

[Mark Kettenis]

> Date: Fri, 3 Dec 2021 09:48:49 +0100
> From: Eskil Varenius via Difx-users <difx-users at listmgr.nrao.edu>
> 
> Hello,
> 
> I used DiFX 2.5.4 to correlate some data, then difx2fits (bundled with 
> 2.5.4 release) to generate fits-IDI. When using CASA importfitsidi to 
> read this into Measurement Set format, I get the interesting log message
> 
> 2021-12-03 08:44:56    WARN        FITS card 46: EQUINOX = 'J2000   ' /
> 2021-12-03 08:44:56    WARN        Keyword value has wrong data type.
> 
> I assume either difx2fits or CASA is wrong here. Do we know if difx2fits 
> is correct, and if not: can this be fixed to avoid the message? Seems 
> benign, but warnings are annoying...

Hi Eskil,

CASA is correct here; see section 8.3 of the FITS standard (version 3.0).

Cheers,

Mark