Modeling and simulation of sea surface radar observations

Abstract

International audienc

Statistical Analysis of Real Aperture Radar Field Backscattered From Sea Surfaces Under Moderate Winds by Monte Carlo Simulations

“…This is not surprising, as these two models are related to each other (for a given configuration) by a constant polarization term. This constant term is suppressed after the normalization, which explains why we get the same observed results (see equations (2)(3)). As a consequence, in what follows, it is not necessary to plot each of the four cases: giving the mean µ and standard deviation σ of the four cases and plotting only one case is enough.…”

“…For all simulations that follow, we recall the following common parameters: the frequency f = 10 GHz, the surfaces are sampled at ∆ x = ∆ y = λ 0 /8, with a number of samples N ech = 16384 2 , corresponding to a surface length L = 61.4 m. The number of generated surfaces N surf = 63. Knowing that the total number of statistical data N data is related to the number of generated square surfaces N surf and the ratio of the surface length L over the radar resolution d through the equation N data = N surf E(L/d) 2 (with E the integer part operator), for d = {0.5; 1; 2; 4; 6; 8; 10} m, N data = {937, 692; 234, 423; 56, 700; 14, 175; 6, 300; 3, 087; 2, 268}, respectively. First, before studying the influence of the configurations on the backscattered field amplitude statistics, let us have a look at the statistics of the amplitude and the phase, as well as of the real and imaginary parts.…”

“…The MODENA 1 project aims at modeling and simulating the maritime environment remotely sensed by a radar [1], [2]. In this context, in order to build a realistic simulator of the sea clutter observed by a RAR (Real Aperture Radar), RAR backscattered field statistics are needed.…”

Spectral Decomposition Method for Large Sea Surface Generation and Radar Backscatter Modeling

“…More specifically, sea surface wave generation over a large area and with a high resolution is required in modeling some radar systems (Franceschetti et al, , ; Ghaleb et al, ). Indeed, building a realistic simulator of a real aperture radar in a maritime environment implies the consideration of the spatial resolution of the system and correspondingly, the appropriate scale of the model of the sea surface waves, in order to be able to compute the electromagnetic (EM) wave scattering from this particular surface (Ghaleb et al, ). Therefore, it becomes crucial to have an efficient surface generation technique that does not involve lots of computational resources.…”