         * Computes the distance between two points in meters following a rhumb line          * @param lat0Rad          *   The start latitude in radians          * @param lon0Rad          *   The start longitude in radians          * @param lat0Rad          *   The end latitude in radians          * @param lon0Rad          *   The end longitude in radians          * @param radius          *    The radius of the earth in meters          * @returns          *   