[Difx-users] DiFX version for VGOS data correlation {External}

[Mike Titus]

Just an FYI on something I discovered only a couple weeks ago because I 
have not tested the trunk in a long time.  The trunk currently refuses 
to parse VGOS vex/v2d setups I have used for years and work in all 
tagged versions (including your latest 2.7 build) i.e. right now it's 
entirely broken for VGOS.  Have not had time to pursue it yet. 
Probably coincident with the vex2 changes.

Also just because it's been so long, I tried to run my little heartbeat 
test schedule on the trunk (totally generic i.e. from the example on the 
DIFX site) and that won't run either, complaining about shared 
libraries:

python3: error while loading shared libraries: libssl.so.1.1: cannot 
open shared object file: No such file or directory

Note the same test works with 2.5.4 and 2.7 (tested at the same time). 
This is on po, BTW.

On Thu, 10 Mar 2022, Geoff Crew via Difx-users wrote:

> The issues have to do with the way complex spectra are processed and 
> handled in the backends and DiFX.  2.5.4 was created as a stable 
> processing release for VGOS until the resources were free to guarantee 
> operation in a "current" release.  And fixing this situation requires 
> some coordination with the way backends are operated.  I'm not fluent in 
> the details.
>
> A 2.7.1 release for the EHT processing of the 2021 campaign is likely to 
> occur in the next few months (as the media need to be recycled) and a 
> 2.7-based release suitable for VGOS was one of the options discussed, 
> but I do not know the current plan for VGOS.
>
>
> On 3/10/22 15:07, Michael Dutka via Difx-users wrote:
>> Hi Difx Users,
>> Currently, as I understand things, it is advised that DiFX version
>> 2.5.4 should be used to correlate VGOS data.  I was wondering if
>> anyone here had any documentation explaining why that's necessary and
>> why we can not use the latest tagged release?  I was also wondering if
>> anyone is working on making sure VGOS correlation will be able to be
>> done with future versions of DiFX?
>> Any help with this would be greatly appreciated!
>> -Mike
>>
> -- 
> Geoff Crew
> gbc at haystack.mit.edu
>
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