Effects of Fresnel Corrections in the Scattered Field of General Ellipsoids

Abstract

The study of the scattered field of non-spherical scatterers is becoming an important field, especially in the remote sensing of vegetation. In this study, the scattered field of general ellipsoidal scatterers is formulated based on the generalized Rayleigh-Gans approximation, in which at least one of the dimensions of the ellipsoid is comparably smaller than the wavelength. The scattered field is formulated for the case in which far field approximations are used, as well as for the case in which the Fresnel zone effects are included. Results show that when the Fresnel corrections are considered, the calculated backscattering cross section gives a better match with measurement data compared to when far field approximations are used.

Cuda Implementation in the Em Scattering of a Three-Layer Canopy

“…The leaves in the crown layer are modeled by elliptical discs with random orientations and positions. The EM scattered field from each single leaf is calculated under the generalized Rayleigh-Gans (GRG) approximation [5,12,13], and the underlying surface is treated as a flat surface. The EM scattered field from each leaf is the sum EM scattered fields of the four paths.…”