[Difx-users] problems with difx2mark4 and difx2fits in DiFX 2.4

[Walter Brisken]

Hi Alexey,

One thing that _might_ be related to this is presense of files ending in 
.flag .  These files are used to remove data that "should not exist". 
Usually this is when there are lots of separate sub-arrays running, but 
there could be other use cases.

Without more information debugging cannot really proceed.  The most 
crucial bit of info is the output of difx2fits.  I recommend running 
difx2fits with -v -v options to increase the amount of output information. 
Then capture all of this and include in your message.

If you could send all the files needed to run difx2fits / difx2mark4 that 
would be even better.  It would also be good to include the .vex file and 
the .v2d file.  It would be best if you could identify a small subset of 
data that exposes the problem.

I'll be happy to look into this when I can find a bit of time.  I'll be 
heading off for vacation shortly, so that might be a couple weeks, 
unfortunately...

 	-Walter

On Thu, 20 Jul 2017, Alexey Melnikov wrote:

> Hi all,
>
> The decoded SWIN file header for the latter case looks correct, thus I suppose
> this is a similar bug in converters difx2mark4 and difx2fits and need some
> help in debugging! Please :)
>
> regards,
> Alexey
>
>
>
> On 20170717 14:53:03, Alexey Melnikov wrote:
>> Hi all,
>>
>> I have several experiments with S and X bands and RCP and LCP mixed. In
>> attached archive is example:
>> r1091a.vex - IFs arranges in following order: S1 RCP, X1 RCP, X2 RCP, and S1 LCP,
>> frequencies of S1 in RCP and LCP are the same, X1 and X2 have different
>> frequencies.
>> This experiment is correctly correlated and then difx2mark4 and difx2fits are
>> worked well. File 'r1091a.ovex' is the ovex file generated by difx2mark4 for
>> the first scan.
>>
>> But I meet the following problem for almost identical case with following
>> setup using Ka-band: S1 RCP, X1 RCP, Ka1 RCP, Ka1 LCP. Look file rx0159.vex.
>> File rx0159.ovex is produced by difx2mark4 for the first scan.
>>
>> Somewhat it happen that Ka1 LCP was lost during conversion. The same is
>> apparently with difx2fits.
>>
>> I am using version 2.4 or 2.4.1, I think this is not significant.
>>
>> --
>> Best regards,
>> Alexey Melnikov, Scientific Researcher
>> Laboratory of Radio Astronomy Observations
>> The Institute of Applied Astronomy RAS
>> St.-Petersburg, Russia, tel. +7 (812) 2307413
>>
>>
>> Please avoid sending me Word or PowerPoint attachments.
>> See http://www.gnu.org/philosophy/no-word-attachments.html
>
>
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>
>
>

-- 
-------------------------
Walter Brisken
Director
Long Baseline Observatory
(575)-835-7133 (office)
(505)-234-5912 (cell)