卫星导航增强中的电离层扰动影响研究——基于系统可靠性工程的视角  

A study on impacts of ionospheric disturbances for GNSS augmentation——From the perspective of system reliability engineering

作　　者：刘钝[1] 李锐[2] LIU Dun;LI Rui(China Research Institute of Radiowave propagation,Qingdao 266107,China;Beihang University,Beijing 100083,China)

机构地区：[1]中国电波传播研究所,山东青岛266107 [2]北京航空航天大学,北京100083

出　　处：《全球定位系统》2023年第1期3-13,共11页Gnss World of China

基　　金：国家科技部重点研发计划项目(2020YFB0505603)。

摘　　要：电离层扰动对全球卫星导航系统(GNSS)增强系统影响严重且复杂.现有GNSS增强系统电离层扰动分析方法主要基于中纬电离层环境设计,缺乏针对低纬地区扰动环境影响的针对性,为此提出利用可靠性工程方法开展增强系统电离层扰动影响研究.利用系统可靠性工程中的故障模式分析方法对GNSS增强系统中的电离层扰动影响进行分析,明确了不同扰动现象及其相应的影响机制.分析了GNSS增强系统中的电离层扰动检测方法,指出现有技术难以满足中低纬区域电离层扰动对增强系统复杂影响的分析、识别和检测需求,中国区域增强系统应开展针对性研究工作.A variety of ionospheric disturbance phenomena could pose grave impacts on Global Navigation Satellite System(GNSS)augmentation. The existed works, mainly for mid-latitudes ionosphere condition, are insufficient in low-latitude area where various disturbances exist. A method is proposed for GNSS augmentation study from the perspective of reliability engineering system. Attempt is made to analyze different ionospheric perturbations with failure model and effect analysis(FMEA)method to show the serious impacts. Disturbance detection procedures are also assessed for its effectiveness in augmentation system. The results show the existing designs could not cope with complex ionospheric conditions in low-latitude area for irregularity detection and identification. More efforts had to be made for augmentation systems covering China areas.

关 键 词：电离层扰动 增强系统 完好性 可靠性 故障 

分 类 号：P228.4[天文地球—大地测量学与测量工程]