In this work we deal with the problem of analyzing and modeling marine (lake) surface scattering as seen by high resolution radars, with the aim of highlighting, where possible, the differences due to changes in the range resolution and polarization.

Interest is recently growing in exploiting the advanced multibaseline operation of synthetic aperture radar interferometry (InSAR) to solve layover effects, that can degrade conventional SAR and InSAR imagery. In this work we report about: experiments of the functionality of "layover-free" or "higher-order" interferometry with the dual-baseline single-pass SAR interferometer AER-II. Non-parametric, parametric and hybrid spatial spectral estimators are applied to process the three-antenna non uniform array data. Calibration issues, first real data results and impact of order selection are discussed for a bridge over the valley scene.

This paper is devoted to developing a scattering model for coherent imaging systems. It describes the statistical properties of the image intensity due to the distribution of scatterers on a subresolution scale. The roughness of the scatterers' strength, the randomness of the spatial architecture, and the birth-death process of the scattering centers are considered. Two parameters of the image intensity are examined for the characterization of the scattering medium: 1) the signal-to-noise ratio (SNR), which permits the distinguishing of sub-Rayleigh (SNR<1) from super-Rayleigh (SNR>1) conditions and 2) the correlation coefficient. These parameters permit the estimation of the roughness and randomness degrees of the structure. The model is then extended to account for specular effects and applied to sea clutter. A quantitative treatment of the spatial and temporal correlation characteristics, based on a physical understanding of the underlying process, is derived. Experimental results are presented to validate the model.

In this brief communication, some comments on the above paper are made. The efficiency of the method of analysis proposed by Vrana and other methods available in literature are compared.