Investigation of Vegetation Phases Extraction Based on Polarmetric SAR Interferometry

A high precise tree height retrieval method is presented in this paper. The accuracy of ground and canopy phases in vegetation area extracted by different algorithms are firstly estimated using PolInSAR(Polarmetric SAR Interferometry) images simulated by PolSARProSim software, and then the effect of ground moisture and roughness on phases extraction are also analyzed. The research shows that the relatively "pure" phase of ground and canopy can be extracted by PD(Phase Diversity) algorithm, which can be used to build more precise tree height model. Ground moisture has little effect on phases while ground phases depend on ground roughness, which almost has no effect on canopy phases.