Forward Radar Propagation Over Oil Slicks on Sea Surfaces Using the Ament Model With Shadowing Effect

Abstract

Abstract-This paper is devoted to the forward radar propagation over clean and contaminated seas, using the Ament model and by taking the shadowing effect into account. The well-known Rayleigh parameter, which characterizes the degree of roughness of a corrugated surface for the case of reflection on a rough surface, is presented. Then, it is extended to the transmission through a rough surface, and to the reflection on a layer of two rough interfaces. This extended Rayleigh parameter allows then to calculate the forward radar propagation over oil slicks on sea surfaces, using the Ament model. Moreover, the model is improved by taking the shadowing effect into account. Numerical results of contaminated seas are presented, and compared to that of clean seas.

CA-CFAR DETECTION PERFORMANCE OF RADAR TARGETS EMBEDDED IN €œNON CENTERED CHI-2 GAMMA” CLUTTER

“…Gaussian model has been widely considered but it showed limitations when considering high resolution radars [1][2][3][4][5][6]. Many other models have been considered such Lognormal law, Weibull model and the K-distribution [7,8]. K-distribution is the most suitable model to fit sea clutter in high resolution radars and quantity of work [9][10][11][12][13][14] has been related to this area.…”

Sparse Time-Frequency Representation Based Feature Extraction Method for Landmine Discrimination

“…As seen from Fig. 7, the classical PDFs contain Gauss, Rayleigh, Weibull and Logarithmic normal [32,33]. Table 1 shows that Gauss function has the minimum MSE with the distributions of feature 1 and feature 2.…”

Degree of Roughness of Rough Layers: Extensions of the Rayleigh Roughness Criterion and Some Applications

“…For the case of a thin layer with identical surfaces, the reflected field modulus |E tot r | is equal to |r eq (θ i ) × E i |, with E i the incident wave amplitude and r eq the equivalent Fresnel reflection coefficient given by Equation (17) in [29]. From Equation (6), it can be seen that |E 0 | = |r 12 (θ i )E i |.…”

“…For instance, in ocean remote sensing, it is used in the Ament model [5,6,16,17] to calculate the grazing incidence forward (i.e., in the specular direction) radar propagation over sea surfaces, in optics to determine optical constants of films [7,8] and other applications [9][10][11][12][13][14][15], or in indoor propagation, in ray-tracing based wave propagation models that take the wall roughness into account by introducing a power attenuation parameter [21][22][23][24][25].…”