A variety of test programs can be found in the folders in `examples/fortran`

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Folder directory | Description |
---|---|

`SHCilmPlus/` |
Demonstration of how to expand spherical harmonic files into gridded maps using the GLQ routines, and how to compute the gravity field resulting from finite amplitude surface relief. |

`SHExpandDH/` |
Demonstration of how to expand a grid that is equally sampled in latitude and longitude into spherical harmonics using the sampling theorem of Driscoll and Healy (1994). |

`SHExpandLSQ/` |
Demonstration of how to expand a set of irregularly sampled data points in latitude and longitude into spherical harmonics by use of a least squares inversion. |

`SHMag/` |
Demonstration of how to expand scalar magnetic potential spherical harmonic coefficients into their three vector components and total field. |

`MarsCrustalThickness` / |
Demonstration of how to compute a crustal thickness map of Mars. |

`SHRotate/` |
Demonstration of how to determine the spherical harmonic coefficients for a body that is rotated with respect to its initial configuration. |

`SHLocalizedAdmitCorr/` |
Demonstration of how to calculate localized admittance and correlation spectra for a given set of gravity and topography spherical harmonic coefficients. |

`TimingAccuracy/` |
Test programs that calculate the time required to perform the GLQ and DH spherical harmonic transforms and reconstructions and the accuracy of these operations. |