| BDS多路径效应特征及其对静态基线解精度的影响 |
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| 引用本文： | 石强,戴吾蛟,曾凡河,张超.BDS多路径效应特征及其对静态基线解精度的影响[J].大地测量与地球动力学,2016,36(10):874-878. |
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| 作者姓名： | 石强 戴吾蛟 曾凡河 张超 |
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| 摘 要： | 为研究BDS载波相位多路径效应的特征，在强多路径环境下进行连续多天短基线静态数据采集，并计算双差观测值残差序列，分GEO、IGSO、MEO 3类卫星分析BDS多路径重复性，在此基础上研究多路径效应对BDS静态基线解精度的影响。结果表明，BDS多路径误差具有较强的重复性，其中GEO及IGSO卫星的多路径误差重复周期为1 d，MEO卫星的多路径误差重复周期为7 d；GEO卫星的多路径误差具有系统性偏移，但不是一个常数，而是随时间发生缓慢变化，因此长时间的静态观测并不能平滑该误差，从而导致在较强多路径环境下，BDS多路径误差对其静态解的影响可达cm级。
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| 关 键 词： | BDS 载波相位 多路径 静态基线解 |
The Characteristics of BDS Carrier Phase Multipath and Its Effects on Static Baseline Solution |
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| SHI Qiang,DAI Wujiao,ZENG Fanhe,ZHANG Chao.The Characteristics of BDS Carrier Phase Multipath and Its Effects on Static Baseline Solution[J].Journal of Geodesy and Geodynamics,2016,36(10):874-878. |
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| Authors: | SHI Qiang DAI Wujiao ZENG Fanhe ZHANG Chao |
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| Abstract: | In order to study the characteristics of BDS carrier phase multipath, the BDS/GPS observation data of a short baseline is collected in a strong multipath environment and the repeatability of GEO, IGSO and MEO satellites are analyzed respectively using the double differenced observation residual series. Furthermore, the effects of BDS multipath on static baseline solutions are studied. The results show that BDS multipath errors have a strong repeatability, but the multipath repeat periods differ for distinctive types of satellite. The multipath repeat periods of GEO and IGSO satellites are approximately a sidereal day, while it is around seven sidereal days for the MEO satellites. The multipath errors of GEO satellites present a nearly systematic shift; not a constant, but slow, change. They cannot be mitigated by smoothing using long observation time, because the effects of BDS multipath errors on static baseline solutions could reach the centimeter level in a strong multipath environment. |
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| Keywords: | BDS carrier phase multipath static baseline solution |
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