Galileo三频非组合PPP相位小数偏差估计与模糊度解算

熊博文; 潘林; 裴根; 刘宁; 章湘粤; 邓民

doi:10.12265/j.gnss.2023157

Galileo三频非组合PPP相位小数偏差估计与模糊度解算

doi: 10.12265/j.gnss.2023157

中南大学地球科学与信息物理学院, 长沙 410083

基金项目: 国家自然科学基金项目(41904030)

详细信息

作者简介:
熊博文：(2000—)，男，硕士研究生，研究方向为GNSS精密定位. E-mail：bowenxiong@csu.edu.cn

潘林：(1989—)，男，博士，副教授，研究方向为GNSS精密定位及其地学应用. E-mail：linpan@csu.edu.cn

裴根：(1998—)，男，硕士研究生，研究方向为GNSS数据处理. E-mail：genpei@csu.edu.cn

通讯作者:
潘　林E-mail: linpan@csu.edu.cn

中图分类号: P228.4
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- 被引次数: 0
出版历程
- 收稿日期: 2023-07-26
- 录用日期: 2024-03-14
- 网络出版日期: 2024-04-25

Fractional cycle bias estimation and ambiguity resolution for Galileo triple-frequency uncombined PPP

School of Geoscience and Info-Physics, Central South University, Changsha 410083, China

摘要

摘要: 欧洲的Galileo系统目前已经有28颗在轨可用卫星，具备全球精密定位能力，并且所有卫星均能够播发多频信号，多频信号融合有望进一步改善精密单点定位(precise point positioning，PPP)模糊度固定解性能. 本文研究了Galileo三频非组合PPP相位小数偏差(fractional cycle bias，FCB)估计与模糊度解算(ambiguity resolution，AR)方法，并将其结果同双频非组合PPP模糊度固定解与浮点解结果进行了对比分析. 结果表明：利用155个全球分布的地面跟踪站数据进行FCB估计，单个频率上的FCB估值序列标准差(standard deviation，STD)优于0.04周；双频PPP浮点解在E、N、U方向收敛时间分别为32.0 min、10.0 min、43.5 min，双频PPP固定解收敛时间分别减少到30.5 min、8.5 min、32.0 min，三频PPP固定解收敛时间分别进一步缩短到16.5 min、8.0 min、32.0 min.
- 相位小数偏差(FCB) /
- 模糊度解算(AR) /
- 精密单点定位(PPP) /
- 三频信号 /
- Galileo
Abstract: Galileo already has 28 in-orbit satellites, with precise positioning capabilities on a global scale. All Galileo satellites are capable of broadcasting multi-frequency signals, and multi-frequency integration is expected to further improve the performance of precise point positioning (PPP) ambiguity-fixed solutions. In this paper, the fractional cycle bias (FCB) estimation method and ambiguity resolution (AR) method for Galileo triple-frequency uncombined (UC) PPP are developed, and the derived results are compared with those of dual-frequency UC PPP ambiguity-fixed and ambiguity-float solutions. The results indicate that the standard deviation (STD) of UC FCB series on a single frequency is better than 0.04 cycles using datasets from 155 globally distributed ground tracking stations. The convergence time of Galileo dual-frequency PPP float solutions in the east, north and up directions is 32.0 min, 10.0 min and 43.5 min, respectively, and the corresponding statistic of dual-frequency PPP fixed solutions is reduced to 30.5 min, 8.5 min and 32.0 min in the three directions, respectively. The convergence time of triple-frequency PPP fixed solutions is further shortened to 16.5 min, 8.0 min and 32.0 min in the three directions, respectively.
- fractional cycle bias (FCB) /
- ambiguity resolution (AR) /
- precise point positioning (PPP) /
- triple-frequency signals /
- Galileo

HTML全文

图 1 155个MGEX站地理分布

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图 2 2021年11月8日E5a-E5b超宽巷、E1-E5a宽巷、4×E1-3×E5a窄巷FCB估值序列

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图 3 2021年11月8日E1、E5a、E5b非组合FCB估值序列

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图 4 用于定位验证的35个MGEX站地理分布

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图 5 ARHT站三种PPP方案前1 h定位误差

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图 6 BRUX站三种PPP方案前1 h定位误差

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图 7 三种PPP方案前1 h定位精度(采样间隔30 s)

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参考文献(13)

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