Multiple scatterers identification in complex scenarios with adaptive differential tomography
ABSTRACT In the last few years, the interest is increasing in the interferometric processing of multibaseline/multitemporal SAR data from complex urban or infrastructure areas. In order to locate and monitor a high number of ground structures with the lowest signal misinterpretation, the identification, i.e. the detection and height and deformation velocity estimation, of both single and multiple layover scatterers is an important step. This issue is addressed here by extensively experimenting the technique of adaptive differential tomography, a recent interferometric framework which allows to resolve multiple moving scatterers at different heights in the same SAR cell. To this aim, adaptive differential tomography is augmented with an automated information extraction algorithm. The technique has been applied to real C-band spaceborne data over an urban area. Corresponding results are discussed.
Conference Proceeding: Polarimetric Differential-TomoSAR Imaging[show abstract] [hide abstract]
ABSTRACT: Recently, in parallel to the maturation of the operative InSAR techniques based on phase-only data, much interest has grown in techniques based on the coherent combination of SAR images at the complex (amplitude and phase) data level, for the extraction of a more rich information on the observed scene. In particular Tomographic SAR techniques constitute the frontier of this research area. Recently, the Differential Tomography framework has also been introduced and experimented, producing ‘space-time’ signatures of multiple non stationary scatterers superimposed in a SAR cell. To further increase the amount of information which can be extracted, in this work we extend the Differential Tomography framework in a polarimetric sense, allowing the extraction of joint information about the heights, the deformation velocities and the scattering mechanisms characterizing the imaged scatterers. First real data samples are presented of the new Polarimetric Differential Tomography concept.European Conference on Synthetic Aperture Radar (EUSAR);