| 整数相位钟法精密单点定位模糊度固定模型及效果分析 |
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| 引用本文： | 刘帅,孙付平,郝万亮,刘婧,李海峰.整数相位钟法精密单点定位模糊度固定模型及效果分析[J].测绘学报,2014,43(12):1230-1237. |
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| 作者姓名： | 刘帅 孙付平 郝万亮 刘婧 李海峰 |
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| 作者单位： | 信息工程大学 导航与空天目标工程学院, 河南 郑州 450001 |
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| 摘 要： | 精密单点定位(PPP)模糊度固定方法有3种:星间单差法、整数相位钟法和钟差解耦法,但目前仅法国CNES公开发布用于整数相位钟法PPP模糊度固定的产品,因此研究基于整数相位钟法的用户端PPP模糊度固定模型很有必要.本文分析了整数相位钟法PPP模糊度固定模型,着重指出该模型与传统浮点解PPP模型的区别;提出一种顾及质量控制的逐级模糊度固定策略用于具体实施PPP模糊度固定.大量动态PPP解算试验表明:与浮点解PPP相比,固定解PPP具有更快的收敛速度且定位精度和稳定性更好.
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| 关 键 词： | 精密单点定位(PPP) 整数相位钟法 模糊度固定 逐级模糊度固定策略 |
| 收稿时间： | 2014-05-28 |
| 修稿时间： | 2014-08-14 |
Modeling and Effects Analysis of PPP Ambiguity Fixing Based on Integer Pha se Cl ock Method |
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| LIU Shuai,SUN Fuping,HAO Wanli ang,LIU Jing,LI Haifeng.Modeling and Effects Analysis of PPP Ambiguity Fixing Based on Integer Pha se Cl ock Method[J].Acta Geodaetica et Cartographica Sinica,2014,43(12):1230-1237. |
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| Authors: | LIU Shuai SUN Fuping HAO Wanli ang LIU Jing LI Haifeng |
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| Institution: | College of Navigation and Aerospace Engineering, Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | Three representative precise point positioning (PPP) ambiguity fixing methods have been developed, which include the single-difference between-satellite method, the integer phase clock method and the decoupled clock method. Currently, only the French CNES published products applied to PPP ambiguity fixing using the integer phase clock method. Therefore, it is necessary to study the client PPP ambiguity fixing model based on integer phase clock method. This paper analyzes PPP ambiguity fixing model based on the integer phase clock method, and highlights the difference between the ambiguity-fixed PPP model and the traditional ambiguity-float PPP model. A cascaded ambiguity fixing strategy is proposed to perform PPP ambiguity fixing with special regard to quality control. Numerous kinematic PPP experiments show that ambiguity-fixed PPP can obtain a fast convergence, a better and stability positioning accuracy, compared with ambiguity-float PPP. |
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| Keywords: | precise point positioning (PPP) integer phase clock method ambiguity fixing cascaded ambiguity fixing strategy |
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