Ground-Agriculture Separation my Means of PolInSAR.

POLINSAR coherence is a sensitive parameter for both, the vertical structure of the resolution cell and the types of scattering mechanisms inside the cell. It is being utilized in various areas, including natural media parameter inversion. Different applications have been developed in combination with the ”Random Volume over Ground” (RVoG) and the ”Oriented Volume over Ground” (OVoG) models. The later one expects generally horizontally and vertically oriented volume and surface. Furthermore, the phase shift effects, induced by refractivities inside the vegetation, are neglected. This work analyses these two restrictions and extends the formulation of the OVoG model for the coherency matrices to the propagation effects caused by differential refractivity and orientation effects of the vegetation and the surface. Based on this model, its applicability for monitoring sub– vegetation parameters is investigated. For this purpose, the ground to volume coherence ratio is maximized and ground sensitive parameters are extracted. To evaluate the results, a coherent volume over ground model simulation has been developed. Initial experimental results from the simulations will be presented.