[Difx-users] A few surprises

[Eskil Varenius]

Hi Adam,

Apologies, but I will have to defer sending additional details as the 
data in question have already been removed after correlation. (I would 
like to verify that the files I send indeed produce the errors I claim, 
so I don't send files with other typos). Also, I have too many other 
todo-items to follow this up right now, but we regularly observe with 
similar settings so I should get another data set to play with in a few 
weeks. When I do, I will check the input-file differences and let you 
know, and keep the data on disk for additional tests. But I did 
experience the same thing for all similar data so far. Will let you know 
once I have new data.

Cheers

Eskil

On 2020-11-30 11:43, Adam Deller wrote:
> Hi Eskil,
>
> Thanks for the heads up, the first two are surprising (I'm never 
> surprised by gaps in documentation!)
>
> I've got no experience with the intel compilers, so will pass on that 
> one.  For the second, what is the difference in the .input file 
> produced by vex2difx in the two cases?  That might help shed some light.
>
> Cheers,
> Adam
>
> On Mon, 30 Nov 2020 at 21:18, Eskil Varenius via Difx-users 
> <difx-users at listmgr.nrao.edu <mailto:difx-users at listmgr.nrao.edu>> wrote:
>
>     Dear difx developers,
>     I have noted a few surprises which I would like to report:
>
>     - Compiling DiFX 2.6.1/2.6.2 with intel 2019 compiler, mpifxcorr runs
>     but refuses to actually read any data. It just sits there, never
>     starting the correlation. Using intel 2018 compiler instead,
>     everything
>     works nicely.
>
>     - Correlating mixed-polarisation data (antenna ON: R-pol, OE and
>     OW: X/Y
>     pol) delivers correlation products on the mixed circ/linear baselines
>     (R-X and R-Y pol), but not on the linear/linear baselines
>     (XX,XY,YX,YY).
>     However, if I add zoomwindows - describing the same setup already
>     in the
>     VEX file, so no actual zooming - then I get also the linear
>     polarisation
>     products. (I know mixed-pol support is limited, but might as well
>     note
>     the behaviour.)
>
>     - "difx2mark4 --help" v1.6 does not say it needs .calc files, but
>     seems
>     it does. So documentation should be amended?
>
>     Kind regards
>     Eskil
>
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> -- 
> !=============================================================!
> A/Prof. Adam Deller
> ARC Future Fellow
> Centre for Astrophysics & Supercomputing
> Swinburne University of Technology
> John St, Hawthorn VIC 3122 Australia
> phone: +61 3 9214 5307
> fax: +61 3 9214 8797
>
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