| 精密单点定位整周模糊度快速固定 |
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| 引用本文： | 张宝成,Teunissen J G Peter,Odijk Dennis,欧吉坤中国科学院测量与地球物理研究所,动力大地测量学重点实验室,蒋振伟.精密单点定位整周模糊度快速固定[J].地球物理学报,2012,55(7):2203-2211. |
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| 作者姓名： | 张宝成 Teunissen J G Peter Odijk Dennis 欧吉坤中国科学院测量与地球物理研究所 动力大地测量学重点实验室 蒋振伟 |
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| 作者单位： | 1. 中国科学院 测量与地球物理研究所, 动力大地测量学重点实验室, 湖北 武汉 430077;2. 中国科学院研究生院, 北京 100049;3. GNSS Research Centre, Department of Spatial Sciences, Curtin University, Perth 6845, Australia;4. Delft Institute of Earth Observation and Space Systems, Delft University of Technology, 2600 GB Delft, The Netherlands |
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| 基金项目： | 国家自然科学基金，中国科学院计算地球动力学重点实验室开放基金课题，中国卫星导航学术年会青年优秀论文获得者资助课题和国家海洋局第二海洋研究所基本科研业务经费 |
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| 摘 要： | 提出利用GPS参考网估计电离层延迟、卫星相位偏差的算法,用于实现区域内精密单点定位(Precise Point Positioning, PPP)的整周模糊度快速固定.利用站间距约为100~200 km的参考网进行实验,结果表明:电离层延迟的内插和外推精度均优于1 dm,卫星相位偏差估值的日内变化不超过0.2周;此外,单天内不同时刻始,固定PPP整周模糊度所需时长最多不超过10 min,且当模糊度成功固定后,三维位置解较之相应浮点解的精度改善优于80%.新算法可望解决PPP普遍存在的收敛时间过长问题,增强了PPP技术的实用性.
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| 关 键 词： | GPS 精密单点定位 整周模糊度固定 电离层延迟 卫星相位偏差 |
| 收稿时间： | 2011-03-30 |
Rapid integer ambiguity-fixing in precise point positioning |
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| ZHANG Bao-Cheng
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TEUNISSEN J G Peter
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ODIJK Dennis
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OU Ji-Kun
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JIANG Zhen-Wei.Rapid integer ambiguity-fixing in precise point positioning[J].Chinese Journal of Geophysics,2012,55(7):2203-2211. |
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| Authors: | ZHANG Bao-Cheng TEUNISSEN J G Peter ODIJK Dennis OU Ji-Kun JIANG Zhen-Wei |
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| Institution: | 1. Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3. GNSS Research Centre, Department of Spatial Sciences, Curtin University, Perth 6845, Australia;4. Delft Institute of Earth Observation and Space Systems, Delft University of Technology, 2600 GB Delft, The Netherlands |
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| Abstract: | In this contribution, a method of isolating ionospheric delays, Satellite Phase Biases (SPBs) from a regional GPS network is presented to enable Precise Point Positioning (PPP) with rapid integer ambiguity-fixing. Experimental results based upon a reference station network whose inter-station distances range from 100~200 km demonstrate that the interpolation and extrapolation errors of the ionospheric delays are less than 1 dm, and the intra-day variation of the SPBs is no more than 0.2 cycles. Besides, starting from arbitrary epochs within the test day, the durations required for integer ambiguities fixing in PPP are at most 10 min, and after successful ambiguity-fixing, the obtainable accuracy of the 3-dimension positions can reach 80% improvements in contrast to their ambiguity-float counterparts. The proposed method is likely to overcome the long convergence behavior that is commonly experienced during PPP implementations and therefore promotes the practicability of the PPP. |
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| Keywords: | GPS Precise point positioning Integer ambiguity fixing Ionospheric delays Satellite phase bias |
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