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ajdawson / windspharm

A Python library for spherical harmonic computations on vector winds.
http://ajdawson.github.io/windspharm
MIT License
82 stars 38 forks source link

add support for SHTns #30

Open jacksilver045 opened 10 years ago

jacksilver045 commented 10 years ago

SHTns[1] is a "blazingly fast" library for Spherical Harmonic Transform. It is used in gfs-dycore[2] instead of spherepack and Jeffrey Whitaker provided a nice shallow water example in python with some wrappers[3] to equivalent pyspharm functions. It should be straitforward to implement into windspharm as an optionnal backend.

[1] http://users.isterre.fr/nschaeff/SHTns/ [2] https://code.google.com/p/gfs-dycore/ https://code.google.com/p/gfs-dycore/source/browse/trunk/src/shtns.f90 [3] http://users.isterre.fr/nschaeff/SHTns/shallow_water_8py-example.html

ajdawson commented 10 years ago

I've been thinking about this myself recently. Thanks for providing the links, they'll be helpful.

I did investigate this a year or so ago but had no luck getting the SHTns code working correctly for some simple use cases, hopefully things will be different this time.