水稻后向散射的模拟、验证及参数敏感性分析

Rice Backscattering Simulation, Verification and Parameter Sensitivity Analysis

根据蒙特卡洛方法建立的水稻微波散射模型,针对水稻的生长特征对模型进行了修正,利用散射计实测数据验证了修正后模型模拟结果的准确性。结果表明,基于蒙特卡洛方法建立的水稻后向散射模型能够很好地模拟水稻的后向散射特征。根据水稻生长参数实测数据设定模型输入参数的变化范围,模拟不同输入参数对应的水稻后向散射系数,获得了系统参数、稻杆和稻叶等水稻生长参数与后向散射系数之间的定量关系,并针对各类参数进行了敏感性分析。

This paper establishes rice microwave scattering model according to the Monte Carlo method, and modifies the model to meet the rice growth characteristics. The model simulation results were compared with scatterometer measured data, the result show that the proposed rice backscatter model can well simulate the backscattering characteristics of rice. The variation ranges of input parameters of the model were set according to the actual growth parameters of rice. The rice backscattering coefficients with different input parameters, such as rice straw and rice leaf parameter, were simulated. Finally, the sensitivity analysis according to the rice backscatterin coefficient and growth Dararneters is presented.