一种基于SRTM的雷达可视域图绘制方法

A Plotting Method of Radar Viewshed Maps Based on SRTM

针对目前雷达选址时可能遇到地物遮挡的问题,需要分析雷达站周围一定范围内的可视域情况,本文提出并实现了一种基于SRTM的雷达可视域图绘制方法,首先通过解析输入参数、获取SRTM高程数据和坐标转换建立各个方位上的高程线方程;然后计算出高程线上各个采样点处的最大遮蔽角;再计算出目标高度下高程线上各个采样点处的可视性;最后,使用Matlab软件绘制出了可视域图。本文还将Matlab仿真结果与地图绘制软件GlobalMapper进行了对比,验证了该方法的可行性和有效性。

Focusing on the problem that the radar site may be occluded by ground objects,it is necessary to analyze the viewshed situation within a certain range around the radar station.In this paper,a plotting method of the radar viewshed map based on SRTM was proposed.First,the elevation line equation in each direction was established after analyzing the input parameters,obtaining the SRTM elevation data and converting coordinates.Then the maximum defilade angles of each sampling point on the elevation line were calculated.The visibility of each sampling point on the elevation line under the target height were also calculated.Finally,the viewshed map was drawn by using Matlab.The simulation results of Matlab were also compared with the maps generated by the map drawing software GlobalMapper,and the comparison results verified the feasibility and effectiveness of the proposed method.