Spatial phase behavior in SAR images

David Petit; Loic Soucille; Jean-Denis Durou; Frederic Adragna; Helene Oriot; Elisabeth Simonetto

doi:10.1117/12.453977

28 January 2002 Spatial phase behavior in SAR images

David Petit, Loic Soucille, Jean-Denis Durou, Frederic Adragna, Helene Oriot, Elisabeth Simonetto

Proceedings Volume 4543, SAR Image Analysis, Modeling, and Techniques IV; (2002) https://doi.org/10.1117/12.453977
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

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.

Citation Download Citation

David Petit, Loic Soucille, Jean-Denis Durou, Frederic Adragna, Helene Oriot, and Elisabeth Simonetto "Spatial phase behavior in SAR images", Proc. SPIE 4543, SAR Image Analysis, Modeling, and Techniques IV, (28 January 2002); https://doi.org/10.1117/12.453977

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