28 January 2002 Spatial phase behavior in SAR images
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Abstract
It is well known that a SAR image is composed of two types of information: amplitude and phase. Nevertheless, the information contained in the phase is hardly exploited on its own. Indeed, the number of processes at work and the scale difference between the image resolution and the wavelength induce, with regard to the phase, a quasi-random spatial behavior. However, our recent work shows that the phase of one image can be spatially correlated. First, we define an estimator for the spatial correlation of the phase, and study its behavior with real data. We assess the phase correlation according to the resolution and the type of surface. Then, we set down the theoretical bases of a statistical model of this behavior. We highlight the conditions required with regard to the resolution, the sampling rate, and the impulse response. We therefore identify the best kinds of surfaces, so that the phenomenon occurs. Hence, we simulate the phase correlation for different cases according to the phase model defined. We choose suitable parameters to the conditions of the real data and compare measurements and simulations. Finally, we propose possible applications related to the use of this new source of information.
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David Petit, David Petit, Loic Soucille, Loic Soucille, Jean-Denis Durou, Jean-Denis Durou, Frederic Adragna, Frederic Adragna, Helene Oriot, Helene Oriot, Elisabeth Simonetto, Elisabeth Simonetto, } "Spatial phase behavior in SAR images", Proc. SPIE 4543, SAR Image Analysis, Modeling, and Techniques IV, (28 January 2002); doi: 10.1117/12.453977; https://doi.org/10.1117/12.453977
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