[Difx-users] vex2 has landed {External}

[Mark Kettenis]

> Date: Thu, 27 Jan 2022 23:56:19 +0000
> From: "Phillips, Chris \(S&A,
>  Marsfield\) via Difx-users" <difx-users at listmgr.nrao.edu>
> 
> Hi Walter,
> 
> It would be useful to make available some vex2 compliant schedules,
> to allow us to test other aspects of the system (for example the LBA
> has a whole suite of perl scripts for paring vex 1.5 and generating
> telescope specific schedule files (ie equivalent of drudg) and wiki
> summaries etc.

Hi Chris,

pySCHED can create VEX2 schedules (in parallel to VEX 1.5 schedules),
so that's probably a good way to test.

Cheers,

Mark

> > On 28 Jan 2022, at 10:12, Walter Brisken via Difx-users <difx-users at listmgr.nrao.edu> wrote:
> > 
> > 
> > Hi DiFX Users,
> > 
> > I have merged the Goddard/NVI vex2 parser and related vex2difx changes (which were developed under the vex2 branch over the last several months) into the vex2difx trunk.
> > 
> > Behavior for vex1.5 files should remain largely unchanged.  There has been a report of an incomplete vex1.5 file that used to work not working anymore -- such non-compliant cases are not likely to receive any development attention :)
> > 
> > However, if you see any regression when using a valid vex1.5 file, please send me all the files needed to run vex2difx and I will work to resolve the issue.
> > 
> > Support for new vex2 features in vex2difx is not complete and has not been extensively tested -- both due to lack of an adequate supply of vex2 files that span the huge space of possible use cases.  Test reports (fails and successes) and sample files would be appreciated.  That said, some of the critical new features (support for the BITSTREAM and DATASTREAM tables that better support Mark5B and VDIF formats) are supported, at least to some degree.
> > 
> > The ChangeLog file in the SVN repository has some details on the supported features.
> > 
> > The vex2 defining document is available at the NRAO wiki, but note that this location is subject to change:
> > 
> > https://safe.nrao.edu/wiki/bin/view/VLBA/Vex2doc
> > 
> > 
> > 	-Walter
> > 
> > -------------------------
> > Walter Brisken
> > NRAO
> > Deputy Assistant Director for VLBA Development
> > (505)-234-5912 (cell)
> > (575)-835-7133 (office; not useful during COVID times)
> > 
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