Study of Dispersive and Anisotropic Scatterers Behavior in Radar Imaging Using Time-Frequency Analysis and Polarimetric Coherent Decompositions

Konferenz: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
16.05.2006 - 18.05.2006 in Dresden, Germany

Tagungsband: EUSAR 2006

Seiten: 4Sprache: EnglischTyp: PDF

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Duquenoy, Mickaël; Ovarlez, Jean Philippe; Vignaud, Luc (ONERA, Electromagnetism and Radar Department, Signal Processing Unit, France)
Duquenoy, Mickaël; Ferro-Famil, Laurent; Pottier, Eric (Image and Remote Sensing Group, IETR, University of Rennes 1, Rennes, France)

A fully polarimetric Time-Frequency Analysis is proposed for Radar Imaging (SAR, ISAR) to analyse the anisotropic and dispersive behavior of deterministic target illuminated by a radar sensor. This method is based on the hyperimage concept which describes the response of scatterers as a function of the observation angle, of the emitted frequency and of the polarimetric decomposition. New polarimetric hyperimages point out a non-stationary behavior which can be interpreted by the physics parameters of the target (geometrical shape, relative orientation). They allow a best understanding of the scattering mechanisms. Basic statistics extracted from these representations show that they are tools to detect nonstationnary scatterers and are the first step to a new classification.