Modelling of Roughness Effects on Electromagnetic Waves Propagation above Sae Surface Using 3D Parabolic Equation

This paper deals with works on radar links in a three-dimensional marine environment. Radar performances prediction represents an important phase in the radar system parameterisation. This prediction is strongly related to the electromagnetic waves propagation modelling in maritime environment. The modelling of propagation, in troposphere, requires a good consideration of meteorological parameters (principally refraction index) and a realistic characterization of wave interaction with the sea surface (taking into account of reflection and surface roughness). This article will focus on three sides. The first one is the modelling of electromagnetic waves propagation, using 3D parabolic wave equation and a Split Step Fourier algorithm. The second one consists on introduction of a hybridised method for a better taking into account of sea surface roughness in wave propagation. Finally some simulation results are presented and analyzed, for different configurations and different sea states, in a three-dimensional propagation domain.