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