The application of 3-D coherent backscattering model on sar imaging of virtual vegetation

The interaction of electromagnetic wave and ground vegetation is very complex, so it's necessary to build a coherent scattering model to calculate the field distribution of vegetation. Coherent scattering model was developed based on distorted Born approximation (DBA) which can be obtained from volume integral equations with half-space dyadic Green Functions. In this paper, we combine a 3-D coherent scattering model that calculated the backscattering fields of forest canopies and the real SAR imaging process together. We use a 3-D coherent scattering model with the positions of leaves and branches explicitly specified to simulate SAR data and then field imaging algorithm was used to process the simulated SAR data to reconstruct the two-dimensional image of virtual vegetation. Tree crown information can be distinguished from the imaging results and multiple scattering influences can be also presented.