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An improved multipath mitigation method using central hemispherical cell in precise point positioning

delete2025-02-01
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PRE
AI
W
Wei Zhan
X
Xiufeng He
H
Haijun Yuan
H
Hao Yang
J
Jinwen Zeng
D
Dongzhen Jia
DOI:10.1016/j.asr.2024.11.048delete
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摘要

摘要

En 中文
多路径误差会对精密单点定位(PPP)的性能产生显著影响。先前的研究普遍利用卫星轨道的空间重复性来进行多路径抑制。多路径半球图(MHM)是一种广泛使用的基于离散网格的模型。此外,还提出了各种改进方法,如多路径叠加(MPS)和趋势面分析(T-MHM),以增强基于离散网格的模型性能。本文提出了一种改进的基于离散网格的模型,命名为多路径中心网格(MCG),旨在进一步利用多路径误差的空间相关性。具体而言,改进方法使用距离加权来自适应计算目标卫星的多路径修正。本文系统地验证了MCG在PPP中的可行性。同时,对一些典型的基于离散网格的模型进行了测试比较。测试针对两个具有不同观测环境的水库的观测数据,进行了动态和静态PPP。结果表明,这些改进模型之间存在差异。此外,两种模型都能提升性能,且改进模型T-MHM和MCG优于原始MHM。另外,建议采用高分辨率的一致MCG模型,因为它能提供更稳健的结果。(c) 2024 COSPAR. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Keyword:
Multipath mitigation
Hemispherical map
Adaptive central cell
Precise point positioning
GNSS

期刊

Advances in Space Research 封面图
Advances in Space Research
IF:
2.8
论文数:
1.7K
被引数:
2.0W

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