| 一种北斗星源伪距波动改正方法 |
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| 引用本文： | 蔡韧鸣,孙付平.一种北斗星源伪距波动改正方法[J].测绘科学技术学报,2016(6):577-581. |
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| 作者姓名： | 蔡韧鸣 孙付平 |
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| 作者单位： | 1. 信息工程大学,河南郑州450001;北斗导航应用技术河南省协同创新中心,河南郑州450001;2. 信息工程大学,河南郑州,450001 |
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| 基金项目： | 国家自然科学基金项目(41374027) |
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| 摘 要： | 北斗伪距观测值中存在与卫星相关的误差,这种误差称为星源伪距波动。为了进一步探究北斗星源伪距波动误差规律,提高定位精度及可靠性,对12个IGS multi-GNSS测站提供的三频数据进行了分析,并在此基础上建立了基于卫星高度角的多项式改正模型。实验表明,星源伪距波动主要存在于北斗IGSO和MEO卫星中,没有在GPS,GLONASS,GALILEO和北斗GEO卫星中发现类似的现象。经改正,自测测站三频伪距多路径组合的RMS分别减少了41.3%,37.2%及11.4%,与卫星高度角相关系数小于0.01。
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| 关 键 词： | 北斗系统 伪距波动 多路径误差 改正模型 高度角 |
A Mitigation Method of Satellite-Induced Beidou Code Variation |
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| CAI Renming,SUN Fuping.A Mitigation Method of Satellite-Induced Beidou Code Variation[J].Journal of Zhengzhou Institute of Surveying and Mapping,2016(6):577-581. |
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| Authors: | CAI Renming SUN Fuping |
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| Abstract: | Beidou code pseudorange measurements reveal variations because of the influence of satellite-induced errors.This phenomenon is called Satellite-induced Code Variation.In order to analyse this phenomenon,improve the positioning precision and improve the positioning accuracy and reliability,code multipath combination is used to analyze IGS multi-frequency data.After that,an elevation-dependent and frequency-dependent polynomial mitigation model is established.The result shows that the code variation mainly remains in BDS IGSO and MEO satellites.It is rarely found in other systems.Test results of using the mitigation model show that the experiment station's RMS of multi-frequency MP measurement reduced by 41.3％,37.2％,and 11.4％.The correlation between the MP measurement and elevation is less than 0.01. |
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| Keywords: | Beidou system code variation multipath effect mitigation model elevation |
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