基于GPU的机载气象雷达仿真系统设计与实现

摘要

The design ideas and implementation of an airborne weather radar simulation system is described in detail.First,3D cloud field data is acquired based on 3D reconstruction technology of satellite image,adding in virtual terrain data,setting up an atmosphere environment module of weather radar.Based on the 3 D cloud field,according to the flight route and radar's scanning type,compute the radar echo,analyze the echo data and visualize it.Among the computing of radar echo data,very large intense computing will be involved,so solution of CPU + GPU heterogeneous parallel is proposed.The simulation result shows that the method accelerated the system significantly.%详细描述了一种基于GPU的机载气象雷达仿真系统的设计思想和实现方法.首先对卫星图像进行三维重建,得到三维云场体数据,通过加入虚拟地形数据,搭建气象雷达的大气环境激励模块.然后在建立三维云场基础上,根据飞机飞行姿态以及真实雷达的扫描方式,计算飞机前方扇形区域的雷达回波强度,并对雷达回波数据进行数据分析和显示.最后为了实现雷达回波模拟的大规模数据密集型计算,提出CPU+ GPU异构并行的解决方案.实验结果表明,可以实现飞机在大范围飞行情形下对机载气象雷达回波进行实时仿真的效果.