npm

shtools

Spherical harmonic analysis and synthesis tools for geophysical data

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About

Spherical Harmonic Tools

Commands

shtoolsMakeMagneticGravityGridsSHExpandDHSHExpandLSQ

Examples

Expand spherical harmonic coefficients from a gridded dataset$ SHExpandDH inputgrid.dat -n maxdegree -o coefficients.txt
Synthesize a grid from spherical harmonic coefficients$ MakeMagneticGravityGrids coefficients.txt outputgrid.dat -n maxdegree
Perform least-squares spherical harmonic expansion with data weights$ SHExpandLSQ data.txt -n maxdegree -w weights.txt -o coeff.txt