SHTOOLS/pyshtools is a Fortran-95/Python library that can be used for spherical harmonic transforms, multitaper spectral analyses, expansions of gridded data into Slepian basis functions, and standard operations on global gravitational and magnetic field data. https://shtools.github.io/SHTOOLS/ Sun, 22 Feb 2026 20:39:47 +0000 Sun, 22 Feb 2026 20:39:47 +0000 Jekyll v3.10.0