Ks                      Calculates Total Wavenumber for Stationary
                        Rossby Waves (Ks)
Ktotal                  Calculates Total Wavenumber for Rossby Waves
                        (K)
betaks                  Calculates Beta and Ks
betam                   Calculates Meridional Gradient of the Absolute
                        Vorticity (beta) in mercator coordinates
                        (betam)
coastlines              Coastlines
ray                     Calculates the Rossby waves ray paths
ray_path                Calculate the ray paths / segment of great
                        circles
ray_source              Calculate the Rossby waves ray paths over a
                        source region
raytracing              raytracing: Rossby Wave Ray Tracing
trin                    Performs trigonometric interpolation
wave_arrival            Filter the ray paths that arrives in an area of
                        interest
ypos                    Interpolation selecting the nearest neighbor
