Study Of Electromagnetic Scattering From Vegetation And Rough Surface In Radar Remote Sensing

Electromagnetic scattering from vegetation and rough surfaceplays an important role in analyzing radar remote sensing information. In thisdissertation, electromagnetic scattering from vegetation is studied from threeaspects, including radar system parameters(incidence angle, polarization),vegetation structures and scattering models.Radar system in active remote sensing is introduced, especially AIRSARsystem, which provided experimental data for validating vegetation models;Parameters of vegetation structure and rough earth surface are described andmodels for calculating dielectric constants of vegetation and soil, which hadbeen verified, are given; Discrete scatters(cylindrical, discal) scatteringcharacteristics are studied, discrete vegetation scattering models based ondistorted Born approximation and radiative transfer model based on RTtheory are presented and applied to agricultural vegetation. Their utilities areproofed. At last, how vegetation backscattering changed along with radarsystem parameters variation is discussed intensively in order to optimizeradar system parameters.