.CalculateGaussCoef     Lookup Table for Gauss coefficients g & h
.CalculateGeocentricFieldSum
                        Calculate sum of geocentric field components
.CalculateMagneticField
                        Calculate Expected Magnetic Field from WMM2015
.CalculateRadiusCurvature
                        Radius of curvature of prime vertical
.CalculateRecursiveLegendre
                        Run recursion to compute associated Legendre
                        functions
.CheckVersionWMM        Check if given time is consistent with
                        available WMM versions
.ConvertGeocentricToGeodeticFieldComponents
                        Geocentric Coordinates to Geodetic Coordinates
.ConvertGeodeticToGeocentricGPS
                        Convert from Geodetic to Geocentric Coordinates
.DeriveVersionInfo      Derive WMM version based on given time
.RunLegendreProcedure   Compute Associated Legendre Functions Given
                        Sequence of (degree, order) Indices
GetMagneticFieldWMM     Calculate Expected Magnetic Field from WMM
wmm                     wmm: R Implementation of World Magnetic Model
