基于视窗采样的大规模三维电磁环境可视化

摘要

目前三维电磁环境可视化大多针对局部地形区域,为了实现大规模场景三维电磁环境的可视化,提出了一种基于视窗采样的体数据组织方式.通过提取视窗所显示的数字地球经纬度范围,确定三维电磁环境的绘制区域,进行等间隔采样并使用Longley-Rice电波传播模型计算得到体数据.采用面绘制的方法对大规模场景三维电磁环境进行可视化.采取基于频域、时域的展示方法对三维电磁环境进行实时动态的展示.实验结果表明,能够较好地展示大规模场景三维电磁环境的整体特征和局部细节,体数据计算速度相比传统方法取得了一定提高.%Visualization of electromagnetic environment mostly focuses on local area. An approach of rendering large-scope electromagnetic environment is presented by screen-based sampling method. Determine the rendering area by extracting the latitude and longitude range shown in the screen. Volume data is calculated using uniformly sampling and longley-rice radio propagation model. Visualize electromagnetic environment by using surface rendering method. Frequency domain and time domain method is used to make visualization dynamically. The result shows that the approach can visualize the large scope the electromagnetic environment, and accelerate the speed of processing volume data.