基于预报星历和基准站辅助的BDS实时精密单点定位  

BDS real-time precise point positioning based on forecasting ephemeris and reference station

作　　者：范士杰[1] 顾宇翔 胡锦民 陈岩[1] 舒国权 FAN Shijie;GU Yuxiang;HU Jinmin;CHEN Yan;SHU Guoquan(College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China;Maanshan Iron & Steel Co. Ltd, Ma’anshan 243011,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]马鞍山钢铁股份有限公司,安徽马鞍山243011

出　　处：《测绘工程》2022年第2期8-13,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41876106);山东省自然科学基金资助项目(ZR2019MD005)。

摘　　要：基于预报星历的常规实时精密单点定位存在相位模糊度难以收敛、定位精度低等问题。文中采用附加基准站改正信息的PPP算法,消除与卫星有关误差影响。依托香港卫星定位参考站网,采用WHU预报星历获取实时卫星轨道和钟差改正,开展基于预报星历和基准站辅助的中国北斗卫星导航系统实时PPP应用研究,并对其定位性能进行分析。试验结果表明,基准站辅助的BDS实时静态PPP单天解的重复测量精度在水平方向优于1 cm,高程方向优于2 cm;基准站辅助的BDS实时动态PPP相位模糊度能够快速收敛,收敛后的定位精度大幅提升,其重复测量精度在水平方向优于4 cm,高程方向优于10 cm,相对于参考坐标的外符合精度在水平方向优于7 cm,高程方向优于15 cm。Conventional real-time precise point positioning(PPP)based on forecasting ephemeris has some problems such as difficult convergence of phase ambiguity and low precision.The PPP algorithm with reference station correction is used to eliminate the influence of satellite-related errors.Relying on the Hong Kong satellite positioning reference station network,this paper uses WHU forecasting ephemeris products to obtain real-time satellite orbit and clock offsets,and carries out the application study of China’s BeiDou navigation satellite system(BDS)real-time PPP based on forecasting ephemeris and reference station.The positioning performance of the above BDS real-time PPP is analyzed.The result shows that the repetition measurement accuracy of BDS real-time static single-day solution assisted by reference station is better than 1cm in the horizontal direction and 2 cm in the elevation direction;the ambiguity of BDS real-time dynamic PPP assisted by reference station can quickly converge,and the positioning accuracy of the BDS PPP is also greatly improved,which has the repetition measurement accuracy better than 4cm in the horizontal direction and 10 cm in the elevation direction.Referenced to the GPS post-processed relative positioning week solution,the average positioning accuracy of BDS real-time dynamic PPP assisted by reference station is better than 7 cm in the horizontal direction and 15 cm in the elevation direction.

关 键 词：预报星历 基准站改正信息 BDS 实时精密单点定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]