Feature request: calculate velocity of nodal feature, and subtract from winds

[kwilliams-mo]

Feature request

It would be really useful to

• Output the velocity of the nodal feature e.g. in StitchNodes.
• Be able to subtract velocity of nodal feature from the winds around it (to get system-relative winds) before using NodeFileCompose to make a composite.

Thanks :)

[paullric]

This should now be available in commit 0ae6268. Please test it out and let me know if it works as expected.

The argument StitchNodes --add_velocity now adds two additional columns to the nodefile output that describe the eastward and northward velocity at the feature location.

The argument NodeFileCompose --in_fmt "lon,lat,slp,wind,phis,uvel,vvel" --var "UBOT,VBOT" --minus_nodefile_col "uvel,vvel" now subtracts those columns in the nodefile from the output of snapshots, mean, min, max and histograms.