数据与计算发展前沿 ›› 2025, Vol. 7 ›› Issue (3): 194-201.

CSTR: 32002.14.jfdc.CN10-1649/TP.2025.03.016

doi: 10.11871/jfdc.issn.2096-742X.2025.03.016

• 技术与应用 • 上一篇    下一篇

基于BDS异步RTK差分定位的数据分析

应俊俊1,2,*(),马立烨1,2,盛传贞1,2,陈秀德1,2   

  1. 1.中国电子科技集团公司第五十四研究所，河北 石家庄 050081
    2.卫星导航系统与装备技术国家重点实验室，河北 石家庄 050081
  • 收稿日期:2023-09-14 出版日期:2025-06-20 发布日期:2025-06-25
  • 通讯作者: *应俊俊（E-mail: yingjjcetc@163.com）
  • 作者简介:应俊俊，中国电子科技集团公司第五十四研究所,高级工程师，硕士，研究方向为高精度数据处理及软件总体设计。
    本文承担工作为：数据分析与论文撰写。
    YING Junjun, with a master’s degree, is a senior engineer at the 54th Research Institute of China Electronics Technology Group Corporation. Her current research interests include GNSS high-precision data processing and software design.
    In this paper, she is responsible for data analysis and paper writing.
    E-mail: yingjjcetc@163.com
  • 基金资助:
    国家重点研发计划308项目;河北省战略性技术专项基金项目(23319902L);国家重点课题(22684X023)

Data Analysis Based on BDS Asynchronous RTK

YING Junjun1,2,*(),MA Liye1,2,SHENG Chuanzhen1,2,CHEN Xiude1,2   

  1. 1. The 54th Research Institute of China Electronics Techenology Group Corporation, Shijiazhuang, Hebei 050081, China
    2. State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang, Hebei 050081, China
  • Received:2023-09-14 Online:2025-06-20 Published:2025-06-25

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摘要：

【目的】在实时动态差分（Real-Time Kinematic, RTK）定位中，基准站观测数据通过数据通信链路传播到达移动站时会有一定的时延，同时可能出现数据中断、数据频度不一致情况。【方法】为解决上述问题，基于异步差分的RTK模型受到了广泛关注。为探讨时间不同步问题对差分相对定位的精度影响以及评估异步差分模型的应用效果，本文在介绍基本原理方法的基础上，采用多组不同观测条件下的北斗实测静态和动态数据，并设置了不同的时延条件，进行了算例验证。【结论】采用异步差分模型后，相比于同步差分，随着时延的增加，水平精度和高程精度均呈下降趋势。当时延为30 s时，定位精度下降可维持在1倍以内，当时延为60 s时，定位精度维持在水平方向5~10 cm、高程方向10~20 cm，仍可基本满足高精度定位应用的需求。

关键词: 北斗卫星导航系统, 异步RTK, 时延, 数据分析

Abstract:

[Objective] In Real-time Kinematic (RTK) positioning, there is a certain delay when observation data from the reference station propagates to the rover station through a data communication link, along with potential issues such as data interruption and inconsistent data frequencies. [Methods] To solve these problems, asynchronous differential RTK models have garnered significant attention. This study investigates the impact of time asynchrony on the accuracy of differential relative positioning and evaluates the effectiveness of the asynchronous differential RTK model. Based on the fundamental principles and methods, multiple sets of static and dynamic BDS measurements data under varying observation conditions and time delay configurations are used for case validation. [Conclusions] The results indicate that when adopting the asynchronous differential RTK model, compared to synchronous differential processing, both horizontal and vertical accuracies degrade as time delay increases. At a delay of 30 seconds, the positioning accuracy decline remains twice to the synchronous case, while at 60 seconds, positioning accuracies are still maintained within 5-10 cm horizontally and 10-20 cm vertically, which generally meet the requirements of high-precision positioning applications.

Key words: BDS, asynchronous real-time kinematic, time delay, data analysis