| 基于GNSS网络的实时精密单点定位及精度分析 |
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| 引用本文： | 李浩军,王解先,陈俊平,胡丛玮,王虎.基于GNSS网络的实时精密单点定位及精度分析[J].地球物理学报,2010,53(6):1302-1307. |
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| 作者姓名： | 李浩军 王解先 陈俊平 胡丛玮 王虎 |
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| 作者单位： | 1.同济大学测量与国土信息工程系,上海 200092;2.现代工程测量国家测绘局重点实验室,上海 200092;3.德国地球科学研究中心,波茨坦 14473 |
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| 基金项目： | 国家自然科学基金项目，中国大陆构造环境监测网络工程项目 |
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| 摘 要： | 基于局域GNSS网络，以历元间、星间差分技术实时估计了GPS卫星相对钟差的历元间差值；针对所估计实时精密钟差的特征，推导了实时精密单点定位的估计模型.对所估计得到的相对钟差的历元间差值、实时定位结果分别进行了比较、分析.结果表明，相对钟差的历元间差值与IGS的最终星历相比其精度可以达到0.08 ns；每小时观测的实时静态定位结果在N、E、U三个方向的精度分别为1.47、3.62、4.09 cm.动态模式，实时结果在N、E、U三个方向的精度分别为2.63、3.82、5.20 cm.与采用IGS最终轨道和钟差解算的结果相比较，实时计算结果优于采用精密轨道和精密钟差计算结果.
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| 关 键 词： | 实时精密单点定位 GNSS网络 历元间差分 星间差分 |
| 收稿时间： | 2009-10-29 |
The realization and analysis of GNSS network based real-time precise point positioning |
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| LI Hao-Jun,WANG Jie-Xian,CHEN Jun-Ping,HU Cong-Wei,WANG Hu.The realization and analysis of GNSS network based real-time precise point positioning[J].Chinese Journal of Geophysics,2010,53(6):1302-1307. |
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| Authors: | LI Hao-Jun WANG Jie-Xian CHEN Jun-Ping HU Cong-Wei WANG Hu |
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| Institution: | 1.Department of Surveying and Geo-informatics Engineering, Tongji University, Shanghai 200092, China;2.Key Laboratory of Modern Engineering Surveying, State Bureau of Surveying and Mapping, Shanghai 200092, China;3.Deutsches GeoForschungsZentrum-GFZ, 14473, Potsdam, Germany |
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| Abstract: | Based on the regional GNSS (Global Navigation Satellite System) network, the real-time epoch-differenced values of relative clock are estimated using the algorithm of epoch-differential and satellite-differential derived model. On account of the character of precise real-time clocks, the estimation model of real-time precise point positioning is deduced by a satellite-differential algorithm. Comparing the epoch-differenced values of relative clock and the IGS final products, the accuracy can be at 0.08 ns. The hourly data was processed using the real-time precise point positioning algorithm based on the estimated real-time precise clocks. In static mode, the hourly positioning accuracy in the N、E and U directions are 1.47、3.62、4.09 cm respectively. The kinematic positioning accuracy in the N、E and U directions are 2.63、3.82、5.20 cm respectively. The accuracy of real-time solution is better than the precise point positioning using the IGS final orbits and clocks in the N, E and U three directions. |
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| Keywords: | Real-time precise point positioning GNSS network Epoch-differenced Satellite-differenced |
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