Time-frequency analysis of point target behaviour in high resolution single polarization SAR images

Conference: EUSAR 2008 - 7th European Conference on Synthetic Aperture Radar
06/02/2008 - 06/05/2008 at Friedrichshafen, Germany

Proceedings: EUSAR 2008

Pages: 4Language: englishTyp: PDF

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Spigai, Marc (Thales Alenia Space, 26, avenue J.F. Champollion, BP 33787, 31037 Toulouse cedex 1,France)
Tison, Céline; Souyris, Jean-Claude (CNES, Altimetry and Radar Department, BPI 601, 18, Avenue Edouard Belin, 31401 Toulouse Cedex 9, France)

In high resolution Synthetic Aperture Radar (SAR) images, backscattering may vary over the integration time. Such fluctuations provide additional information on the illuminated objects. A Time-Frequency Analysis (TFA) allows tracking of such instability for instance through a spectrogram. This method is developed in this paper in order to lead to a classification scheme of different backscattering behaviours. A base of canonical targets is identified and, from their TFA behaviours, a set of parameters has been defined which allows classification of pixels on this base. Moreover, classification performances are evaluated on real high resolution images.