北斗全球试验卫星观测数据质量分析  

Quality Analysis of Observation Data of BeiDou Global Experimental Satellites

作　　者：何义磊 王志文 王潜心[1,2] 毛亚 HE Yilei;WANG Zhiwen;WANG Qianxin;MAO Ya(NASG Key Laboratory of Land Eironment and Disaster Monitoring,China University of Mining and Technology,Xuzhou 221116,China;Schooi of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中国矿业大学国土环境与灾害监测国家测绘地理信息局重点实验室,江苏徐州221116 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《测绘通报》2018年第12期1-5,共5页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(41404033);国家科技基础性工作专项(2015FY310200);江苏省自然基金(BK20181361)

摘　　要：自2015年3月以来,中国共发射了5颗北斗全球新型IGSO和MEO试验卫星,其观测数据质量的好坏直接影响到我国北斗卫星导航系统全球化的进程,因此有必要对观测数据的质量进行全面掌握。本文选用2017年10月1日—10月21日的16个i GMAS观测站和6个MGEX观测站的观测数据,从信噪比、数据完整率、多路径效应、电离层延迟等评估指标对北斗全球试验卫星观测数据进行了质量分析。结果表明,北斗全球试验卫星与现有的北斗工作卫星的B1和B3频率数据完整率相当;试验卫星的信噪比优于北斗工作卫星;试验卫星的多路径误差和电离层延迟误差略优于北斗工作卫星。因此,北斗全球试验卫星能够满足北斗卫星导航系统正常的工作要求。Five new-generation BeiDou global experimental satellites have been launched into inclined geosynchronous orbit (IGSO) and medium orbit (MEO)since March 2015.The quality of observation data directly affects our country's BDS globalization process, so it is necessary to master the quality of the observation.In this paper,the real observation data of 16 iGMAS stations and 6 MGEX stations from October 1 to October 21,2017,are used to analyze the observation data quality of new-generation BeiDou global experimental satellites in terms of signal-to-noise ratio (SNR),data integrity rate,multipath,and ionospheric delay.The results show that the data integrity rate of the B1 and B3 frequency of the BeiDou global experimental satellites and the BeiDou working satellites are equivalent.The SNR of the experimental satellites are better than those of BeiDou working satellites.The multipath error and the ionospheric delay error of the experimental satellites are slightly better than those of the BeiDou satellites.Therefore,the BeiDou global experimental satellites can meet the normal requirements of BeiDou satellite navigation system.

关 键 词：北斗 全球试验卫星 评估指标 质量分析 

分 类 号：P228[天文地球—大地测量学与测量工程]