北斗GBAS着陆系统信号覆盖评估方法  

Assessment method of signal effective coverage for BDS-based GBAS landing system

作　　者：焦卫东[1] 唐志虎 沈笑云[1] 万棣[1] 张思远[1] 

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300 [2]中国民用航空中南地区空中交通管理局湖北分局,武汉430000

出　　处：《电波科学学报》2016年第5期978-987,共10页Chinese Journal of Radio Science

基　　金：国家自然科学基金委员会-中国民航局民航联合研究基金(U1533115);天津市应用基础与前沿技术研究计划(14JCYBJC16000);中央高校基本科研业务费项目(3122013C016;3122013Z001)

摘　　要：提出了北斗地基增强系统(Ground-based Augmentation Systems,GBAS)的着陆系统(GBAS Landing System,GLS)信号覆盖评估方法,从卫星对地覆盖及甚高频数据广播电台(VHF Data Broadcast,VDB)信号覆盖两方面进行评估.卫星对地覆盖评估中首先利用网格点分析法和视函数法评估卫星对地覆盖重数及4个覆盖性能指标:覆盖百分比、最大覆盖间隙、平均覆盖间隙及时间平均间隙,然后从用户角度分析卫星覆盖问题(卫星可见性).VDB信号覆盖评估中,对电磁波传播过程综合考虑了地球曲率及地形影响.另外,综合考虑目标机场的卫星可见性及VDB信号覆盖范围,结合美国联邦航空管理局规定的VDB信号最小覆盖空域,给出了本文评估方法在VDB选址中的应用.仿真结果表明该方法可以合理确定北斗GLS信号的覆盖情况及VDB位置.An assessment method of signal coverage is proposed for GBAS（ground-based augmentation system）landing system（GLS）based on BeiDou Navigation Satellite System（BDS）.The covering situation is discussed from two aspects：the satellite coverage on earth and the covering of VHF data broadcast （VDB）radio signal.In the first aspect,firstly the grid-point analysis method and visibility function are used to evaluate the cover multiplicity of BDS and other four performance index which are percent cover-age,maximum coverage gap,mean coverage gap and time average gap.Then the satellite visibility is ana-lyzed from the user perspective.In the second aspect,the earth curvature and the terrain occlusion are con-sidered into the propagation of electromagnetic wave.In addition,combining with the minimum cover air-space of the VDB signal which is regulated by Federal Aviation Administration ,a VDB locating method is proposed based on the proposed assessment method.Experimental results show that the signal coverageof GLS based on BDS and the location of VDB can be determined reasonably by the proposed methods.

关 键 词：北斗卫星导航系统 地基增强系统 着陆系统 甚高频数据广播电台 信号覆盖 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]