基于数字地形图的机场导航台遮蔽角计算方法  

Research on calculation method of shelter angle of airport navigation station based on digital topographic map

作　　者：钱学飞 沈映政[1] 王友昆 瞿华蓥[1] 杨根新 QIAN Xuefei;SHEN Yingzheng;WANG Youkun;QU Huaying;YANG Genxin(Yunnan Land Resources Vocational College, Kunming 652501, China;Kunming Surveying and Mapping Institute, Kunming 650051, China;Kunming University of Science and Technology Oxbridg College, Kunming 650106, China)

机构地区：[1]云南国土资源职业学院,云南昆明652501 [2]昆明市测绘研究院,云南昆明650051 [3]昆明理工大学津桥学院,云南昆明650106

出　　处：《测绘工程》2021年第6期60-64,共5页Engineering of Surveying and Mapping

基　　金：云南省地矿局科技创新基金资助项目(2017JJ05);云南省教育厅科学研究基金资助项目(2019J0481)。

摘　　要：机场导航台遮蔽角的计算能够为飞机提供飞行保障,保障雷达在各方向上的安全扫描。常规的计算方法都是基于格网DEM采用通视分析(LOS)的方法进行计算,无法使用机场建设前期未经格网化的地形图数据。文中针对机场设计阶段的需求,提出一种基于数字地形图高程线的改进LOS分段斜率比较法(SK-LOS),通过对数字地形图上的高程线数据进行抽稀和索引,筛选符合求交条件的高程线,实现各方向遮蔽角的快速计算,并结合工程实践实现计算的流程化处理。通过在云南省某通用机场导航台建设中的实践表明,该方法较传统的LOS方法效率提高100%以上,计算结果准确可靠,精度满足机场导航台的设计要求。The calculation of the shelter angle in the airport navigation station can provide flight support for the aircraft and ensure the scanning safety of the radar in all directions.The conventional calculation method is based on grid DEM and the method of LOS(Light of Sight),which is not applicable to non-gridded map data.According to the needs of airport design stage,based on the elevation line data of digital topographic map,this paper adopts a method of dividing and indexing the elevation line,which uses the improved algorithm(SK-LOS)to realize the fast calculation of shelter angle in all directions and to streamline the procession.Taking the calculation of shelter angle of a general airport in Yunnan Province as an example,this paper shows that the efficiency of this method is more than 100%higher than that of the traditional LOS method,and the calculation results are accurate and reliable which can meet the design requirements of the airport navigation station.

关 键 词：DEM 遮蔽角 地形图 LOS 

分 类 号：P208[天文地球—地图制图学与地理信息工程]