Abstract: Aiming at the problem that topography affects the signal coverage, a new method of analyzing DME/DME navigation signal coverage combined with the actual topography is proposed. This paper based on Digital Elevation Model(DEM), analyzes the signal coverage of single DME by using visual analysis theory. Combined with geographic information systems, it analyzes the DME/DME signal effective coverage of Beijing-Shanghai route. Simulation results show that the method can more accurately predict the DME/DME signal effective coverage and avoid potential security risks.

Key words: area navigation, DME/DME system, signal coverage, terrain masking, Geographic Information System(GIS)

摘要： 针对地形因素对信号覆盖范围存在遮蔽的问题，提出一种结合实际地形分析DME/DME导航信号有效覆盖范围的方法。采用可视性分析方法，通过数字高程模型数据定量分析单个DME台站的信号覆盖范围，并与地理信息系统相结合，以京沪区域导航航路为例对DME/DME信号的有效覆盖范围进行分析与研究。仿真结果证明，该方法可准确地预测DME/DME信号的覆盖范围，能为区域导航程序设计提供可靠的理论支持，避免潜在的安全风险。

关键词: 区域导航, DME/DME系统, 信号覆盖, 地形遮蔽, 地理信息系统

CLC Number: 

• TP391