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TARGET SCATTERING CHARACTERIZATION IN SAR POLARIMETRY USING MODEL-FREE APPROACHES
Journal
International Geoscience and Remote Sensing Symposium (IGARSS)
Date Issued
2021-01-01
Author(s)
Dey, Subhadip
Bhattacharya, Avik
Frery, Alejandro C.
López-Martínez, Carlos
Abstract
Target decomposition methods for polarimetric Synthetic Aperture Radar (PolSAR) data aim at explaining the scattering information. In this regard, several conventional model-based methods use scattering power components to analyze polarimetric SAR data. However, the typical hierarchical process to enumerate power components uses various branching conditions, leading to several limitations. This study uses the 3D Barakat degree of polarization (DoP) to obtain the scattered wave polarization state. We employ the DoP to obtain the even bounce, odd-bounce, and diffuse scattering power components. Besides, we propose a measure of target scattering asymmetry, which is subsequently utilized to obtain the helicity power. All the power components in our approach are roll-invariant and non-negative, and the decomposition preserves the total power. We utilized C-band full polarimetric RADARSAT-2 data to show the effectiveness of the proposed decomposition.
Volume
2021-July
Subjects