数据与计算发展前沿 ›› 2022, Vol. 4 ›› Issue (4): 103-113.

CSTR: 32002.14.jfdc.CN10-1649/TP.2022.04.010

doi: 10.11871/jfdc.issn.2096-742X.2022.04.010

• 专刊： 北斗导航数据处理 • 上一篇    下一篇

改进的非组合精密单点定位模型(MPPP)与实时授时研究

张啸1,2(),赵传宝2(),刘洋2,*()   

  1. 1.中山大学,地理科学与规划学院,广东 广州 510000
    2.广州市城市规划勘测设计研究院,广东 广州 510000
  • 收稿日期:2022-03-31 出版日期:2022-08-20 发布日期:2022-08-10
  • 通讯作者: 刘洋
  • 作者简介:张啸,广州市城市规划勘测设计研究院、中山大学, 博士后,研究方向为GNSS精密定位算法与偏差精化研究。
    在本文中主要承担模型推导、算法验证、数据采集和论文撰写的工作。
    ZHANG Xiao received his Ph.D. degree in geodesy from the Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences in 2020. He is now a postdoctoral fellow at Guangzhou Urban Planning & Design Survey Research Institute and School of Geography and Plann-ing, Sun Yat-sen University. His research interests include multi-GNSS precise point positioning algorithms and bias refi-nement.
    He undertakes the work of model derivation, algorithm verifi-cation, data acquisition, and writing in this work.
    E-mail: zxwhigg@whigg.ac.cn|刘洋,广州市城市规划勘测设计研究院,博士,技术部长,教授级高级工程师,研究方向为3S技术与应用。
    本文中主要负责部分图表绘制并为论文的撰写提供了建议。
    LIU Yang received his Ph.D. degree from Wuhan University in 2007. His research interests are 3S techn-ology and applications. He is currently working in Guangzhou Urban Planning Survey and Design Institute as the technology minister and a professor engineer.
    In this paper, he is mainly responsible for partial chart drawing and providing suggestions for paper writing.
    E-mail: liuyang@gzpi.com.cn
  • 基金资助:
    广东省重点研发计划(2020B0101130009);国家自然科学基金(41774042);国家自然科学基金(42174034);湖北省重点研发计划(2020BHB014);广州市城市规划勘测设计研究院科技基金(RDI2210201 169/041)

Study on Model and Real-Time Timing Based on Modified Uncombined Precise Point Positioning (MPPP)

ZHANG Xiao1,2(),ZHAO Chuanbao2(),LIU Yang2,*()   

  1. 1. School of Geography and Planning, Sun Yat-sen University, Guangzhou, Guangdong 510000, China
    2. Guangzhou Urban Planning and Design Survey Research Institute, Guangzhou, Guangdong 510000, China
  • Received:2022-03-31 Online:2022-08-20 Published:2022-08-10
  • Contact: LIU Yang

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摘要：

【目的】基于精密单点定位（Precise Point Positioning, PPP）的时间传递技术因其高精度、广覆盖而成为GNSS时间传递中的优势性方法。然而,实践过程中发现接收机码偏差天内短时变化是影响接收机钟差估值精准度的主要偏差之一。【方法】因此,本文提出了一种改进的非组合精密单点定位(Modified Precise Point Positioning, MPPP)模型,将接收机码偏差作为时变参数估计,并基于模拟与实测数据进行了方法验证。【结果】结果表明：同等条件下,MPPP授时精度可达0.1~1ns,相较于PPP精度提升30%以上, 【结论】可有效克服接收机码偏差变化对实时授时的影响。

关键词: GNSS授时, 精密单点定位, 实时授时, 接收机码偏差, 接收机钟差

Abstract:

[Objective] Time transfer technology based on precise point positioning (PPP) is the dominant method in GNSS time transfer because of its high precision and wide coverage. However, it is found in practice that the short-time variation of receiver code biases (RCBs) within a day is one of the main deviations that affect the accuracy of receiver clock offset estimation. [Methods] Therefore, a modified precise point positioning model (MPPP) is proposed in this paper, in which the RCBs are estimated as time-varying parameters, and the method is verified based on simulated and measured data. [Results] The results show that the timing accuracy of MPPP can reach 0.1~1ns, and the accuracy can be improved by more than 30% compared with PPP under the same conditions, [Conclusions] which can effectively overcome the influence of RCB changes on real-time timing.

Key words: GNSS timing, precise point positioning, real-time timing, receiver code biases, receiver clock offset