北斗三号系统中轨道地球卫星伪距多路径误差分析和改正
TN95; 2018-2019年,北斗三号系统陆续发射十几颗中轨道卫星,逐步完成全球组网.北斗三号系统卫星同时播发平稳过渡信号B1I、B3I和新体制信号B1C、B2a.实际数据分析表明,中轨道地球卫星民用B1C和B1I频点包含明显的伪距多路径误差,并且由于中轨道地球卫星的轨道特性,这种现象在卫星低高度角,即出入境时十分显著.利用多路径半天球图(Multipath Hemispherical Map,MHM)与伪距噪声和多路径校正法(Code Noise and Multipath Correction,CNMC)两种算法对伪距多路径误差进行改正.MHM算法对伪距多路径误差的改正并不明显;CNM...
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| Published in | 国防科技大学学报 Vol. 43; no. 4; pp. 1 - 8 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学院大学,北京 100049%中国科学院上海天文台天文地球动力学中心,上海 200030
28.08.2021
上海市空间导航与定位技术重点实验室,上海 200030 中国科学院上海天文台天文地球动力学中心,上海 200030 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-2486 |
| DOI | 10.11887/j.cn.202104001 |
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| Abstract | TN95; 2018-2019年,北斗三号系统陆续发射十几颗中轨道卫星,逐步完成全球组网.北斗三号系统卫星同时播发平稳过渡信号B1I、B3I和新体制信号B1C、B2a.实际数据分析表明,中轨道地球卫星民用B1C和B1I频点包含明显的伪距多路径误差,并且由于中轨道地球卫星的轨道特性,这种现象在卫星低高度角,即出入境时十分显著.利用多路径半天球图(Multipath Hemispherical Map,MHM)与伪距噪声和多路径校正法(Code Noise and Multipath Correction,CNMC)两种算法对伪距多路径误差进行改正.MHM算法对伪距多路径误差的改正并不明显;CNMC算法在高度角大于30°时可以将B1C频点伪距多路径误差从0.11 m降低至0.03 m,将B1I频点伪距多路径误差从0.074 m降低至0.024 m,从而使中轨道卫星的多路径误差降低60％以上. |
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| AbstractList | TN95; 2018-2019年,北斗三号系统陆续发射十几颗中轨道卫星,逐步完成全球组网.北斗三号系统卫星同时播发平稳过渡信号B1I、B3I和新体制信号B1C、B2a.实际数据分析表明,中轨道地球卫星民用B1C和B1I频点包含明显的伪距多路径误差,并且由于中轨道地球卫星的轨道特性,这种现象在卫星低高度角,即出入境时十分显著.利用多路径半天球图(Multipath Hemispherical Map,MHM)与伪距噪声和多路径校正法(Code Noise and Multipath Correction,CNMC)两种算法对伪距多路径误差进行改正.MHM算法对伪距多路径误差的改正并不明显;CNMC算法在高度角大于30°时可以将B1C频点伪距多路径误差从0.11 m降低至0.03 m,将B1I频点伪距多路径误差从0.074 m降低至0.024 m,从而使中轨道卫星的多路径误差降低60％以上. |
| Author | 胡小工 曹月玲 刘九龙 |
| AuthorAffiliation | 中国科学院上海天文台天文地球动力学中心,上海 200030;中国科学院大学,北京 100049%中国科学院上海天文台天文地球动力学中心,上海 200030;上海市空间导航与定位技术重点实验室,上海 200030 |
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| Author_FL | LIU Jiulong HU Xiaogong CAO Yueling |
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| DocumentTitle_FL | Analysis and correction of BDS-3 MEO satellites pseudorange multipath error |
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| Publisher | 中国科学院大学,北京 100049%中国科学院上海天文台天文地球动力学中心,上海 200030 上海市空间导航与定位技术重点实验室,上海 200030 中国科学院上海天文台天文地球动力学中心,上海 200030 |
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| Title | 北斗三号系统中轨道地球卫星伪距多路径误差分析和改正 |
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