测绘通报 ›› 2021, Vol. 0 ›› Issue (3): 18-22,74.doi: 10.13474/j.cnki.11-2246.2021.0071

• 北斗三号定位与导航 • 上一篇    下一篇

BDS-3实时精密产品质量评估及其PPP性能分析

徐欣彤1, 杨志鑫1, 张林杰1, 杨颖2, 王怡欣1, 钱闯1, 刘晖1   

  1. 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
  • 收稿日期:2020-10-19 出版日期:2021-03-25 发布日期:2021-04-02
  • 通讯作者: 刘晖。E-mail:liuhui@wnlbs.com
  • 作者简介:徐欣彤(1996—),女,主要研究方向为实时精密单点定位算法。E-mail:312001389@qq.com
  • 基金资助:
    武汉市应用基础研究计划(2018010401011271);湖北省重点研发计划(2020BAB095)

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

XU Xintong1, YANG Zhixin1, ZHANG Linjie1, YANG Ying2, WANG Yixin1, QIAN Chuang1, LIU Hui1   

  1. 1. GNSS Center, Wuhan University, Wuhan 430079, China;
    2. Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China
  • Received:2020-10-19 Online:2021-03-25 Published:2021-04-02

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%。

关键词: BDS-3, 实时精密产品, 数据质量, RTPPP

Abstract: 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 real-time 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.

Key words: BDS-3, real-time products, quality of data, RTPPP

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