Utility to generate weights for interpolation.

[aerorahul]

The global-workflow houses a utility weight_gen. Its description is contained in this README.

This utility is not used in the workflow and does not belong in the workflow.

This issue is opened to document migrating the utility from global-workflow to ufs-utils. The developers can assist in creating appropriate tests.

Tagging @yangfanglin @GeorgeGayno-NOAA for next steps.

[GeorgeGayno-NOAA]

Do you want just 'weight_gen' or the entire 'gaussian_sfcanl' suite of programs?

[aerorahul]

Just weight_gen, as it seems a much more general utility. The Gaussian Surface analysis utility has a specific application for global applications.
We can discuss it's use and appropriate location later.
This issue was to start that conversation.
Thank you.

[GeorgeGayno-NOAA]

Just weight_gen, as it seems a much more general utility. The Gaussian Surface analysis utility has a specific application for global applications. We can discuss it's use and appropriate location later. This issue was to start that conversation. Thank you.

I will look at weight_gen today.

[aerorahul]

Thank you @GeorgeGayno-NOAA
The version in develop has not been converted to cmake.
I have a branch in review that builds this utility w/ CMake.
It is here

[GeorgeGayno-NOAA]

Thank you @GeorgeGayno-NOAA The version in develop has not been converted to cmake. I have a branch in review that builds this utility w/ CMake. It is here

Thanks. It is working.

[GeorgeGayno-NOAA]

@aerorahul I think I have everything working. Do you have some existing 'scrip' files I can use for a baseline test? If not, can you try my branch at 5934dbc and let me know if it is working.

[GeorgeGayno-NOAA]

@aerorahul I think I have everything working. Do you have some existing 'scrip' files I can use for a baseline test? If not, can you try my branch at 5934dbc and let me know if it is working.

@KateFriedman-NOAA Are there some existing 'scrip' files in our 'fix' directories?

[KateFriedman-NOAA]

@GeorgeGayno-NOAA Did you meant "script"? Please clarify.

In case it's useful, here is the list of high-level diffs between fix and fix_NEW right now:

/scratch1/NCEPDEV/global/glopara/diff_fix_fix_NEW.out

[GeorgeGayno-NOAA]

@GeorgeGayno-NOAA Did you meant "script"? Please clarify.

In case it's useful, here is the list of high-level diffs between fix and fix_NEW right now:

/scratch1/NCEPDEV/global/glopara/diff_fix_fix_NEW.out

No, I mean ESMF 'scrip'. When I run the 'weight_gen' program, it outputs a gaussian 'scrip' file (in NetCDF) for different resolutions. Are those files stored under 'fix' somewhere? I saw some 'scrip' files under 'fix_reg2grb2', but they were not gaussian.

@aerorahul and @yangfanglin Who uses this program?

[yangfanglin]

@GeorgeGayno-NOAA You can find similar files under /scratch1/NCEPDEV/global/glopara/fix_nco_gfsv16/fix_fv3_gmted2010 on Hera. They were use to convert forecast output on tiles written out by FMS to Gaussian grid. I and Phil/Jeff used these SCRIP files for FV3GFS early development when the WRITE GRID COMPONENT capability was still under development. The driver script that uses these SCRIP files is ./global-workflow/ush/fv3gfs_regrid_nemsio.sh

[KateFriedman-NOAA]

@GeorgeGayno-NOAA I think @yangfanglin answered your question, he would know more than me anyway. :)