实时精密单点定位精度与收敛性分析  

Analysis Precision and Convergence of the Real-time Precise Point Positioning based on the IGS Real-time Products

作　　者：任晓东[1] 何俊[1] 张小红[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《全球定位系统》2011年第4期10-15,共6页Gnss World of China

基　　金：国家自然科学基金项目(40874017;41074024)

摘　　要：介绍了目前国际全球定位系统服务(IGS)组织提供的实时精密轨道和精密钟差改正系数(ROCC)的基本参数以及能够进行实时精密单点定位软件(BNC)(即BKG NtripClient,由BKG开发的一款用于实时同步接收、解码及转换的GNSS数据流管理软件)。选取了25个全球IGS跟踪站,并基于BNC软件分析了IGS提供的15种ROCC产品对测站实时精密单点定位精度与收敛性的影响。实验结果表明:采用BNC软件,15种ROCC产品均能在平均15min的时间收敛,并且在N、E方向达到6～8cm,U方向10～20cm的定位精度;且不同ROCC产品其收敛时间和定位精度都存在一定的差异。This paper first introduces the basic parameters of the real-time precision ephemeris and precision satellite clock error correction coefficient （ROCC for short, namely Real-time Orbit and Clock Correction） provided by the IGS organization. And the paper also presents the basic situation of the BKG Ntrip Client （BNC） software which can execute real- time single point positioning precisely. On this basis, the author selected 25 global IGS tracking stations, and analysed the effects of the 15 kinds of ROCC products on the precision and convergence of real-time precise point positioning on these stations based on the BNC software. The experimental results show that： using the BNC software, the real-time precise point positioning results based on 15 kinds of ROCC products can converge in about 15rain, and reach to an accuracy of about 6-8 cm positioning in the north direction and east direction, and the positioning accuracy of up direction is about 10-20 cm. Besides, the convergence time and location accuracy of different ROCC products has certain differences.

关 键 词：实时精密单点定位(RT—PPP) 精度 收敛性 BNC 

分 类 号：P228[天文地球—大地测量学与测量工程]