基准站辅助的区域实时精密单点定位  

Regional real-time precise point positioning assisted by reference stations

作　　者：范士杰[1] 胡锦民 彭秀英[1] 陈岩[1] 刘兆健 FAN Shijie;HU Jinmin;PENG Xiuying;CHEN Yan;LIU Zhaojian(College of Oceanography and Space Informatics,China University of Petroleum,Qingdao,Shandong 266580,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

出　　处：《测绘科学》2021年第5期45-50,134,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41876106);山东省自然科学基金项目(ZR2019MD005,ZR2017LD009)。

摘　　要：针对常规实时精密单点定位(PPP)精度低、稳定性差的问题,该文采用附加基准站改正信息的精密单点定位算法,开展了基准站辅助的区域实时PPP应用研究。依托山东省卫星定位连续运行综合应用服务系统(SDCORS),采用IGU预报星历和钟差产品获取实时卫星轨道和钟差改正,探讨站间距、不同基准站、单/双基准站等对区域实时PPP的影响。实验结果表明,以事后PPP单天解坐标为参考,基准站辅助的流动站实时PPP坐标分量和点位平均精度均可达到厘米级水平;流动站实时PPP定位精度与站间距没有明显的相关性;基准站的选择对区域实时PPP结果略有影响,附加双基准站改正的PPP相比于单基准站改正PPP的结果更优,点位精度平均提升约8.6%。Due to the low precision and poor stability of the conventional real-time precise point positioning(PPP),in this paper a PPP algorithm with reference station corrections was used to conduct the research of regional real-time PPP assisted by reference stations.Based on Shandong Continuous Operation Reference System(SDCORS),this paper uses IGU predicted ephemeris and clock products to obtain real-time satellite orbit and clock offsets,and discussed the effects of station spacing,different reference stations,and single/dual reference stations on regional real-time PPP.The results show that the real-time PPP of the rover station assisted by reference stations can reach centimeter level in N,E,U components and point position accuracy,referenced to the post-processed PPP single-day solution.There is no significant correlation between the accuracy of real-time PPP of the rover station and the distance from the rover to the reference station.The choice of the reference stations has a slight impact on the regional real-time PPP,and the accuracy of real-time PPP assisted by dual reference stations is better than that of PPP with single reference station corrections,which has an average improvement in point position accuracy of about 8.6%.

关 键 词：基准站改正信息 SDCORS IGU预报星历和钟差 实时精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]