基于数值天气预报模式的机载气象雷达降雨目标极化特性仿真  

Polarization Characteristics Simulation of Airborne Weather Radar Rainfall Target Based on Numerical Weather Prediction

作　　者：刘夏[1] 韩雁飞[1] 李海[1] 卢晓光[1] 吴仁彪[1] 

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《雷达学报（中英文）》2016年第2期190-199,共10页Journal of Radars

基　　金：国家自然科学基金(61471365,61231017,U1533110);中央高校基本科研业务费资助项目(3122015B002)~~

摘　　要：带有极化信息的气象目标仿真是双极化多普勒天气雷达的理论研究和设计应用的基础。目前,机载双极化气象雷达的理论研究正处于发展阶段,为了给机载双极化气象雷达的技术研究提供数据来源,该文提出了一种基于数值天气预报模式的机载气象雷达降雨目标极化特性仿真方法。该方法利用数值天气预报模式获得温度、粒子浓度、混合比等降雨目标的气象参数,从而实现气象场景的建模与仿真。在分析降雨目标微物理特性的基础上,计算降雨目标的电磁散射矩阵,从而实现降雨目标的极化特性仿真。不同微物理特性参数下的仿真结果表明:该方法可实现降雨目标的气象建模,与实测数据的对比分析可知,该方法的双极化仿真结果有效、可靠。Meteorological target simulation using polarization information is the foundation of the theoretical research and design application of dual-polarization Doppler weather radar. Currently, the theoretical research of airborne dual-polarization weather radar is in the development stage. To provide high-fidelity simulation data required for airborne dualpolarization weather radar detection technology, in this study, a simulation method of the polarization characteristics of rainfall determined using airborne weather radar based on numerical weather prediction is proposed. The numerical weather prediction model is used to realize the modeling and simulation of meteorological scenarios and provide information on meteorological parameters such as temperature, particle concentration, and mixing ratio of rainfall. In the analysis of the microphysical properties of rainfall, the electromagnetic scattering matrix is calculated and the simulation of the polarization characteristics of rainfall is achieved. The simulation results for different microphysical property parameters have led to the establishment of a high-fidelity rainfall model and demonstrated （via comparison with the real radar data） that the simulation of polarization characteristics using the proposed method is effective and reliable.

关 键 词：机载气象雷达 极化特性 微物理特性:降雨目标建模 数值天气预报模式 

分 类 号：TN959.4[电子电信—信号与信息处理]