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PE: Parabolic Equation module

Analysis of the radio-wave propagation over land and sea for medium and large distances

PE module simulates the radio-wave propagation over land and sea for medium and large distances. It takes into account the topographical detail of terrains, the Earth’s curvature and the refraction in the atmosphere. It is based on the solution of the Parabolic Equation (PE) using one-way and two-way Split-Step Algorithm and wide-angle propagator.

The Graphical User Interface of PE allows the user to import terrain models with GeoTIFF or ARC/INFO ASCII GRID formats. The GUI has features that permit extract topographic profiles and create new topographic profiles from the currently imported terrain model. The topographic profiles can be:

  • Radial topographic profiles: Allows the user to extract multiple topographic profiles by choosing a starting point {also referred to as "the center"), and a radius {which will be the length of each topographic profile). The obtained profiles will match the radii of the circle with the specified radius and center point.
  • Profile between two points: Allows the user to extract a single topographic profile between two points of the terrain model.
    The Topographic Profile Editor allows the user to create new topographic profiles or edit the existing ones.

The Simulation Case Editor consists of two different tabs:

  • Refraction Profiles: This tab allows the user to create and edit the refraction profiles that will be used in the simulation. A refraction profile specifies how the refraction index of the air varies along with the height.
  • Case Definition: This tab allows the user to configure the numerical parameters of the simulation case, such as the parameters of the antenna and the spatial bounds of the simulation. In this tab, the user also needs to set the topographic profile used for the simulation case, as well as the assignation of the refraction profiles created in the previous tab to the different range values.

Three result types are provided:  field levels, propagation factor and path losses. There are three possible visualization options: show the results at a given height for every possible value of the range, show the results at a given range for every value of height, or show a colour map of the value of the results of all the profile.

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