Simulation and Analysis for the Microwave Backscattering Coefficient of Rice
水稻微波后向散射系数的模拟分析

Based on the Vector Radiative Transfer Theory (VRT) and SAR technology characteristics, several sub_models for rice are constructed such as leaf scattering model, leaf extinction models, trunk scattering model, trunk extinction model and water reflection model. Then an integrated model including all the main physical processes of rice first_order scattering mechanisms is achieved. By simulations using the validated model, the backscattering coefficient of the rice canopy which can be deduced from the SAR data will be obtained. It will be helpful in theoretical and methodological guidance for using SAR data to make rice fields mapping, rice growth monitoring and rice production forecasting more effectively, more economically and more expediently. In this paper, all of the models are introduced in detail and systema tically. Based on the simulation results, the variations of the rice backscattering coefficient with the date, incidence angle, wave band and polarization change are discussed. At the end of this article, some valuable quantificational results and practical conclusions are summarized.