BDS-3实时精密产品质量评估及其PPP性能分析  

Quality assessment of BDS-3 real-time precision product and analysis of PPP performance

作　　者：徐欣彤 杨志鑫 张林杰 杨颖[2] 王怡欣 钱闯[1] 刘晖[1] XU Xintong;YANG Zhixin;ZHANG Linjie;YANG Ying;WANG Yixin;QIAN Chuang;LIU Hui(GNSS Center,Wuhan University,Wuhan 430079,China;Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [2]中国科学院微电子研究所,北京100029

出　　处：《测绘通报》2021年第3期18-22,74,共6页Bulletin of Surveying and Mapping

基　　金：武汉市应用基础研究计划(2018010401011271);湖北省重点研发计划(2020BAB095)。

摘　　要：随着北斗三号全球卫星导航系统的正式开通,各数据分析中心陆续开始提供北斗三号系统的实时精密产品,使基于北斗三号的实时精密单点定位(PPP)成为可能。实时精密产品质量是影响实时PPP定位性能的重要因素,直接决定了实时PPP的可用性、收敛时间和定位精度。为了促进基于北斗三号的实时PPP的研究和应用发展,本文对现有的北斗三号实时精密产品质量进行了评估,包括数据完整率、钟差精度和轨道精度,并结合全球均匀分布的5个基准站的观测数据,分析了北斗三号的实时PPP性能。试验结果表明,北斗三号实时数据完整率为98.3%,精密钟差和轨道精度分别为0.8 ns、8 cm,加入北斗三号系统后,相比GPS的实时PPP收敛速度提高了30%,定位精度提高了8%。With the official opening of the BDS-3,various data analysis centers have successively begun to provide real-time precision products of the BDS-3 system,making real-time precise point positioning( PPP) based on the BDS-3 is possible. The quality of realtime precision products is an important factor affecting real-time PPP positioning performance,and directly determines the availability,convergence time and positioning precision of real-time PPP. In order to promote the research and application development of real-time PPP based on BDS-3,this paper evaluates the quality of the existing BDS-3 real-time precision products,including data integrity rate,clock bias precision,and orbit precision,combined with observation data from 5 reference stations evenly distributed around the world,and analyzes the real-time PPP of BDS-3 performance. Experimental results show that the real-time data integrity rate of BDS-3 is 98.3%,and the precise clock bias and orbit precision are 0. 8 ns and 8 cm respectively. Compared with GPS,the real-time PPP convergence speed is increased by 30%,and the positioning precision is increased by 8% after joining the BDS-3 system.

关 键 词：BDS-3 实时精密产品 数据质量 RTPPP 

分 类 号：P228[天文地球—大地测量学与测量工程]