摘要
北斗三号PPP服务在海洋环境调查和海洋工程建设等方面有着广阔的应用前景。为了评估PPP-B2b信号在海上的服务性能,利用船载北斗三号接收机采集到的PPP-B2b信号改正数,评估了PPP-B2b信号的轨道和钟差精度,并开展了海上PPP定位试验。研究显示,PPP-B2b改正数对不同轨道卫星改正精度不同,修正后的轨道R、A、C、钟差精度最高可达0.35 m、0.32 m、0.43 m、1.14 ns;不同GEO卫星的改正数精度不同,修正后的轨道R、A、C、钟差精度最高可达0.46 m、0.33 m、0.38 m、3.05 ns;北斗三号海上PPP的首次收敛时间为32.5 min,稳定后N、E、U精度达到0.058 m、0.069 m、0.114 m。结果表明,北斗三号MEO卫星的改正效果整体优于IGSO卫星,C61卫星播发的改正数精度整体优于C59,PPP服务在收敛稳定后能够满足海洋高精度位置服务需求。
BeiDou-3 PPP service has a broad application prospect in marine environmental survey and marine engineering construction.In order to evaluate the service performance of PPP-B2b signal at sea,the orbit and clock error accuracy of PPP-B2b signal is evaluated using PPP-B2b signal correction collected by the shipboard BeiDou-3 receiver,and the marine precise point positioning experiment is carried out in this paper.The research shows that the accuracy of PPP-B2b correction is different for satellites in various orbits.The orbit accuracy in radial(R),along(A),cross(C)directions and clock error accuracy is up to 0.35 m,0.32 m,0.43 m and 1.14 ns,respectively,after correction.The correction accuracy of various GEO satellites is different.The orbit accuracy in R,A,C directions and clock error accuracy is up to 0.46 m,0.33 m,0.38 m and 3.05 ns,respectively,after correction.The first convergence time of BeiDou-3 marine PPP is 32.5 min,and the positioning accuracy in north(N),east(E),and up(U)directions can reach 0.058 m,0.069 m and 0.114 m,respectively,after stabilization.The results show that BeiDou-3 MEO satellite has better correction effect than IGSO satellite,and the correction accuracy broadcasting by C61 satellite broadcast is better than C59 satellite on the whole.PPP service can meet the requirements of marine high-precision location service after convergence and stability.
作者
余德荧
金际航
刘一
边少锋
YU Deyingi;JIN Jihang;LIU Yi;BIAN Shaofeng(Department of Navigation,Naval University of Engineering,Wuhan 430033,China;Naval Research Institute,Tianjin 300061,China)
出处
《海洋测绘》
CSCD
北大核心
2022年第6期51-55,64,共6页
Hydrographic Surveying and Charting
基金
国家自然科学基金优秀青年科学基金(42122025)
国家自然科学基金面上项目(41971416)。
关键词
北斗三号系统
精密单点定位
PPP-B2b信号
卫星轨道修正
卫星钟差修正
海上定位性能
BeiDou-3 navigation satellite system
precise point positioning
PPP-B2b signal
satellite orbit correction
satellite clock correction
maritime positioning performance
作者简介
余德荧(1998-),男,广东潮州人,博士研究生,主要从事GNSS精密定位技术研究。
