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针对合成孔径雷达（ＳＡＲ） 的技术特点，以水稻为研究对象，从矢量辐射传输理论（ＶＲＴ）出发，通过模拟水稻主要器官稻叶和稻杆对电磁波的散射、衰减作用等物理过程，建立了一套完整的水稻一次后向散射作用的物理模型，用以模拟水稻层的后向散射系数σ０ ，并根据模型模拟结果初步讨论了水稻后向散射系数随时相、入射角、波段和极化等因素的变化规律。
Aiming at the technical characteristics of Synthetic Aperture Radar (SAR), taking the rice as the research object, starting from the vector radiation transmission theory (VRT), by simulating the physical processes such as the scattering and attenuation of the electromagnetic wave of paddy rice and rice straw, A complete set of physical model for backscattering of rice was used to simulate the backscattering coefficient σ0 of rice layer. According to the results of model simulation, the backscattering coefficient of rice with time phase, incident angle, wave band and polarization were preliminarily discussed Variation of factors.