| 北斗三号多频相位模糊度无几何单历元固定方法 |
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| 引用本文： | 章浙涛,李博峰,何秀凤.北斗三号多频相位模糊度无几何单历元固定方法[J].测绘学报,1957,49(9):1139-1148. |
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| 作者姓名： | 章浙涛 李博峰 何秀凤 |
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| 作者单位： | 1. 河海大学地球科学与工程学院, 江苏 南京 211100;2. 轨道交通工程信息化国家重点实验室(中铁一院), 陕西 西安 710043;3. 同济大学测绘与地理信息学院, 上海 200092 |
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| 基金项目： | 轨道交通工程信息化国家重点实验室（中铁一院）开放课题（SKLK20-07）；中国博士后科学基金（2020M671324）；中央高校基本科研业务费专项资金（2019B03714）；江苏省博士后科研资助计划项目（2020Z412）；大地测量与地球动力学国家重点实验室开放基金（SKLGED2020-3-8-E）；国家自然科学基金（41830110；41874030） |
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| 摘 要： | 北斗三号全球卫星导航系统目前已提供5个频率的观测数据，因此理论上可进行多频相位模糊度解算（MCAR）。本文系统研究了MCAR的基本理论和方法，包括三频（TCAR）、四频（FCAR）和五频（FiCAR）相位模糊度固定。首先，从线性组合角度出发，给出了TCAR、FCAR和FiCAR方法在内的基本数学模型。其次，探讨了高质量信号及在不同基线长度条件下的最优线性组合。此外，分析了利用无几何模型单历元模糊度固定的常用方法。最后，利用实测北斗三号五频观测数据进行了试验。结果表明，MCAR可有效进行单历元模糊度固定，同时频率数增加可显著提高模糊度固定成功率。
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| 关 键 词： | 北斗三号 模糊度固定 多频观测值 无几何模型 单历元 |
| 收稿时间： | 2020-07-21 |
| 修稿时间： | 2020-08-25 |
Geometry-free single-epoch resolution of BDS-3 multi-frequency carrier ambi-guities |
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| ZHANG Zhetao,LI Bofeng,HE Xiufeng.Geometry-free single-epoch resolution of BDS-3 multi-frequency carrier ambi-guities[J].Acta Geodaetica et Cartographica Sinica,1957,49(9):1139-1148. |
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| Authors: | ZHANG Zhetao LI Bofeng HE Xiufeng |
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| Institution: | 1. School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China;2. State Key Laboratory of Rail Transit Engineering Informatization(FSDI), Xi'an 710043, China;3. College of Surveying and GeoInformatics, Tongji University, Shanghai 200092, China |
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| Abstract: | The BDS-3 navigation satellite system currently provides five-frequency observations, so theoretically it can perform multi-frequency carrier ambiguity resolution (MCAR). This paper systematically studies the basic theory and method of the MCAR, including three-frequency (TCAR), four-frequency (FCAR) and five-frequency (FiCAR) carrier ambiguity resolution. Firstly, from the perspective of linear combination, basic mathematical models including TCAR, FCAR and FiCAR methods are given. Secondly, the high-quality signals and the optimal linear combinations under different conditions of baseline lengths-are discussed. In addition, single-epoch ambiguity resolution using geometry-free model is analyzed. Finally, experiments were conducted using the real BDS-3 five-frequency data. The results showed that the MCAR can effectively fix the ambiguities in single epoch, and the increase of the frequency number can significantly improve the success rates of the ambiguity resolution. |
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