The code generates a pegsertd file, which is a printed output useful only if something goes wrong and you need to debug, but as this code has been tested extensively, debugging should not become necessary. In addition, it produces a pegtdc and a pegtdt file that contain information on the tidal sea level field everywhere in the model domain, and time series information at selected coastal stations respectively. It also produces a pegmovtd file that can be used to animate tides. The file pegtdc contains co-amplitude (the maximum tidal sea surface height at each grid point) and co-phase (and the corresponding time at which maximum tidal sea surface height occurs, referred to Greenwich standard time, in degrees) fields. File pegtdt contains time series of observed and model tidal heights at selected stations where tide gauge data are available for comparison. It gives a graphic description of how well the model does.
The input on bottom depths etc. needed by the model is contained in pegtdu40. The model needs only the bottom depths to be derived from national archives. It does not need any forcing data, winds or buoyancy fluxes. File pegtdstn contains observed data from tidal coastal stations for comparison with model output and for assimilation into the model, as we will discuss shortly.