Characterization of the bistatic scattered distribution

The bistatic scattering from a rough surface is simulated by a computer program for a wide angles range. The effect of shadowing and multiple scattering are taken into account. To describe the scattered field the Kirchhoff theory is used. The probability density functions (pdf) of normalized scattering pressure (modulus) are compared with the Weibull, lognormal and K-distribution pdf. The phase distribution are also studied. The values of the distribution parameters estimated using maximum likelihood (ML) estimators are obtained. The Kolmogorov-Smirnov goodness of fit test is used to determine which of the distribution fits the data better. It is observed that the effect of the size of the illuminated area is important on the phase distribution