Study of Dispersive and Anisotropic Scatterers Behavior in Radar Imaging Using Time-Frequency Analysis and Polarimetric Coherent Decompositions
Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany
Proceedings: EUSAR 2006
Pages: 4Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
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.