| 北斗三号新信号中长基线RTK定位研究 |
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| 引用本文： | 刘濛濛,高成发,张瑞成,邵沛涵,王剑超.北斗三号新信号中长基线RTK定位研究[J].大地测量与地球动力学,2022,42(7):716-721. |
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| 作者姓名： | 刘濛濛 高成发 张瑞成 邵沛涵 王剑超 |
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| 摘 要： | 针对北斗三号MEO卫星和IGSO卫星新增加的B1C和B2a信号中长基线RTK定位精度仍未确定的问题，利用4组中长基线实测数据对BDS-3新信号、BDS-3的B1I、B3I信号和GPS的 L1、L2信号进行数据质量分析和中长基线双频RTK定位研究。结果表明，在数据质量方面，BDS-3的可视卫星数和PDOP值优于GPS，BDS-3新信号的信噪比和多路径误差与BDS-3的B1I、B3I信号和GPS的L1、L2信号相当；在中长基线RTK定位方面，BDS-3新信号B1C+B2a组合的模糊度首次固定时间优于BDS-3的B1I+B3I组合，BDS-3新信号B1C+B2a组合的定位精度略优于BDS-3的B1I+B3I组合和GPS的L1+L2组合，可为用户提供cm级定位精度。
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| 关 键 词： | 北斗三号 B1C和B2a 中长基线 数据质量分析 RTK定位 |
Research on Medium-Long Baseline RTK Positioning of BDS-3 New Signal |
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| LIU Mengmeng,GAO Chengfa,ZHANG Ruicheng,SHAO Peihan,WANG Jianchao.Research on Medium-Long Baseline RTK Positioning of BDS-3 New Signal[J].Journal of Geodesy and Geodynamics,2022,42(7):716-721. |
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| Authors: | LIU Mengmeng GAO Chengfa ZHANG Ruicheng SHAO Peihan WANG Jianchao |
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| Abstract: | The positioning accuracy of medium-long baseline RTK has not been determined in the newly added B1C and B2a signals of BDS-3 MEO satellite and IGSO satellite, so to resolve this problem we analyze the data quality of new signals of BDS-3, B1I and B3I signals of BDS-3 and L1 and L2 signals of GPS. We further study the positioning of dual-frequency RTK using four groups of measured data of medium-long baseline. The results show that, in terms of data quality, the number of visible satellites and PDOP of BDS-3 are better than GPS, and the SNR ratio and multipath error of new signals of BDS-3 are equivalent to B11 and B3I signals of BDS-3 and L1 and L2 signals of GPS. In RTK positioning of medium-long baseline, the ambiguity of the new signal B1C+B2a combination of BDS-3 is better than B1I+B3I combination of BDS-3 for the first time, and the positioning accuracy of new signal combination is slightly better than B1I+B3I combination of BDS-3 and L1+L2 combination of GPS. This can provide users with centimeter-level positioning accuracy. |
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| Keywords: | BDS-3 B1C and B2a medium-long baseline data quality analysis RTK positioning |
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