近固定坐标的GNSS PPP时间传递技术的性能分析

doi:10.13474/j.cnki.11-2246.2025.0516

测绘通报 ›› 2025, Vol. 0 ›› Issue (5): 94-99.doi: 10.13474/j.cnki.11-2246.2025.0516

• 学术研究 • 上一篇

近固定坐标的GNSS PPP时间传递技术的性能分析

陈梦实^1,2, 袁海波^1,2, 李宗源^1,2, 王一桁^1,2, 刘素芳^1,2, 张继海¹

1. 中国科学院国家授时中心, 陕西西安 710600;
2. 中国科学院大学, 北京 101408

收稿日期:2024-08-15 发布日期:2025-06-05
通讯作者: 袁海波。E-mail:Yuanhb@ntsc.ac.cn
作者简介:陈梦实(1997—),男,博士生,研究方向为GNSS PPP时间传递技术。E-mail:chenmengshi@ntsc.ac.cn
基金资助:
国家重点研发计划(2023YFB3906500);国家自然科学基金面上项目(12273045);国家天文数据中心时间频率开放运行(E058KJ1801)

Performance analysis of multi-GNSS PPP time transfer technology with near-fixed coordinates

CHEN Mengshi^1,2, YUAN Haibo^1,2, LI Zongyuan^1,2, WANG Yiheng^1,2, LIU Sufang^1,2, ZHANG Jihai¹

1. National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
2. University of Chinese Academy of Sciences, Beijing 101408, China

Received:2024-08-15 Published:2025-06-05

摘要/Abstract

摘要： 多系统精密单点定位(GNSS PPP)技术在时间传递领域已经有了广泛和深入的应用。在守时实验室时间比对和固定站点机动时间比对测试等应用环境中,可以提前测得观测接收机天线的精密坐标。该条件下进行GNSS PPP解算时,可以利用已知的高精度坐标加快解算时间偏差的收敛时间。本文提出了一种方法,采用已知的三维精密坐标作为卡尔曼滤波器的初始参数,为表征系统不确定度的协方差矩阵设置较小的初始值,以此降低三维坐标解算对整个计算收敛过程的影响。结果表明,在已知精密坐标的情况下,本文提出的近固定坐标的GNSS PPP时间传递方法与传统GNSS PPP时间比对方法相比,结果的收敛速度提升约30%～50%,收敛后的时间比对准确度和稳定度与传统GNSS PPP相当,均方根可达亚纳秒量级,小时稳定度可达1E-13。

关键词: 多系统精密单点定位, 时间频率传递, 全球卫星导航系统

Abstract: The multi-constellation global navigation satellite system precise point positioning(GNSS PPP) technology has been extensively and deeply applied in the field of time transfer. In environments such as time comparison in time keeping laboratories and mobile time comparison tests at fixed sites, the precise coordinates of the receiver's antenna can be measured in advance. When performing GNSS PPP calculations under these conditions, the known high-precision coordinates can be used to accelerate the convergence time of the time transfer result. A method is proposed that uses the known 3D precise coordinates as the initial parameters of the Kalman filter. The corresponding system uncertainty, the elements of the Kalman filter covariance matrix, is set to small values. This reduces the impact of 3D coordinate calculation on the overall convergence process. The results show that, with known precise coordinates, the proposed method improved the convergence speed by approximately 30%～50% compared to traditional GNSS PPP time comparison methods. The accuracy and stability of the time comparison after convergence are comparable to traditional GNSS PPP. The RMS can reach the nanosecond level, and the stability can reach 1E-13 per hour.

Key words: multi-constellation global navigation satellite system precise point positioning, time and frequency, GNSS

中图分类号:

P228

陈梦实, 袁海波, 李宗源, 王一桁, 刘素芳, 张继海. 近固定坐标的GNSS PPP时间传递技术的性能分析[J]. 测绘通报, 2025, 0(5): 94-99.

CHEN Mengshi, YUAN Haibo, LI Zongyuan, WANG Yiheng, LIU Sufang, ZHANG Jihai. Performance analysis of multi-GNSS PPP time transfer technology with near-fixed coordinates[J]. Bulletin of Surveying and Mapping, 2025, 0(5): 94-99.

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近固定坐标的GNSS PPP时间传递技术的性能分析

Performance analysis of multi-GNSS PPP time transfer technology with near-fixed coordinates

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