复杂环境下多模GNSS接收机性能评估  

Performance evaluation of multimode GNSS receiver for CORS network

作　　者：唐龙江[1] 徐爱功[1] 徐宗秋[1,2] 李凯 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]武汉大学卫星导航定位技术研究中心,武汉430079 [3]上海华测导航技术有限公司,上海201702

出　　处：《导航定位学报》2017年第4期105-109,共5页Journal of Navigation and Positioning

基　　金：国家863计划项目(2014AA121301);国家青年基金项目(41504030;41504010);辽宁省高等学校创新团队项目(LT2015013);辽宁省教育厅科学研究一般项目(L2014139);辽宁省科技厅博士启动基金项目(201501126)

摘　　要：针对城市CORS建设中无法模型化的误差逐渐成为影响CORS提供高精度服务的主要因素的问题,提出使用超短基线详细分析多模GNSS接收机在复杂环境下的定位效果,重点测试其在强磁场和多路径环境下的性能;利用一加一RTK模式模拟网络CORS,从系统定位精度和服务性能2方面评估多模GNSS接收机的CORS组网性能。实验结果表明:在强磁场环境下,使用多模GNSS接收机无明显优势;在多路径环境下,使用GNSS接收机不会明显增大多路径效应的影响并且能够提高解的稳定性,其中GPS/GLONASS组合观测值解算的结果最稳定;通过模拟CORS网中参考站对流动站的服务模式,可以发现在强磁场、遮挡和多路径等复杂环境中使用GNSS接收机来组建CORS网能够明显提高CORS系统的精度。Aiming at the problem that the errors unable to model are becoming the main factor of influencing the highly precise service of CORS in the construction of urban CORS,the paper proposed to use the method of ultra-short baseline to analyze the positioning effect of multimode GNSS receiver under complex environment,and specially tested the performance in the condition of strong magnetic fields and multipath.Moreover,the one plus one RTK mode was used to simulate CORS network,and the performance of CORS network for multimode GNSS receiver was evaluated from the two aspects of positioning precision and serving quality.Expermental result showed that using of multimode GNSS receiver would have no superiority in the situation of strong magnetic fields,however,have better stability in the situation of multipath.By simulating the service mode of reference station to flow station in CORS network,it was found that the CORS network constructed by multimode GNSS receiver could help improve the precision of CORS system in the situation of strong magnetic fields,shade and multipath.

关 键 词：多模GNSS CORS 多路径 强磁场 

分 类 号：P228[天文地球—大地测量学与测量工程]