在基于数字地形的雷达图像仿真中,海量数字地形数据调度成为影响仿真实时性的瓶颈。分析了数字地形在雷达图像仿真中的特点,提出了基于规则格网的分块地形组织形式,基于内存映射文件技术,采用数据地形预加载与实时加载相结合的数据调度策略,解决了海量地形数据调度的难题,提高了系统仿真的性能。该方法目前已应用于某型机载雷达仿真系统设计中,取得了较好的效果。 In digital terrain-based radar image simulation, massive digital terrain data scheduling becomes a bottleneck that affects the real-time simulation. This paper analyzes the characteristics of digital terrain in radar image simulation and proposes a block terrain organization based on regular grid. Based on the memory-mapped file technology, a data scheduling strategy based on data terrain preloading and real-time loading is applied to solve the problem that mass terrain Data scheduling problems, improve the performance of system simulation. The method has been applied to the design of a certain type of airborne radar simulation system and has achieved good results.