| 基于原始观测值的单频精密单点定位算法 |
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| 引用本文： | 王利,张勤,涂锐,刘站科.基于原始观测值的单频精密单点定位算法[J].测绘学报,2015,44(1):19-25. |
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| 作者姓名： | 王利 张勤 涂锐 刘站科 |
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| 作者单位： | 1. 长安大学地质工程与测绘学院, 陕西 西安 710054;
2. 西部矿产资源与地质工程教育部重点实验室, 陕西 西安 710054;
3. 德国波茨坦地学中心, 德国 波茨坦 14469;
4. 武汉大学测绘学院, 湖北 武汉 430079;
5. 国家测绘地理信息局第一大地测量队, 陕西 西安 710054 |
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| 基金项目： | 国家自然科学基金(40902081；41104019；41274005；41202189)；国土资源大调查项目(1212011220186；1212011220142；12120114079101)；中央高校基本科研业务费专项(2013G2263003；2013G3264003；2013G3264004)Foundation supportTheNational Natural ScienceFoundation of China(Nos4．0902081；41104019；41274005；41202189)；The Project of State Land Resources Survey of China(Nos1．212011220186；1212011220142；12120114079101)；The Fundamental Research Founds for the Central Universities |
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| 摘 要： | 研究了一种基于GPS原始观测值的单频PPP算法。该算法通过增加电离层延迟先验信息、空间和时间约束的虚拟观测方程,将电离层延迟当作未知参数与其他定位参数一并进行估计来高效修正电离层延迟误差。通过使用全球178个IGS站1d的实测数据对本算法的收敛速度、定位精度和电离层VTEC的精度进行检验与分析。结果表明,该算法的收敛速度和稳定性均得到了改善,其静态单频单天PPP解的精度可达2~3cm、模拟动态单频单天PPP解的精度可达2~3dm,并且单频PPP与双频PPP提取的电离层总电子含量平均偏差小于5个TECU,可作为一种附属定位产品使用。
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| 关 键 词： | 单频精密单点定位 原始观测值 电离层延迟 虚拟观测方程 |
| 收稿时间： | 2014-01-28 |
| 修稿时间： | 2014-09-15 |
A Kind of Single-frequency Precise Point Positioning Algorithm Based on the Raw Observations |
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| WANG Li,ZHANG Qin,TU Rui,LIU Zhanke.A Kind of Single-frequency Precise Point Positioning Algorithm Based on the Raw Observations[J].Acta Geodaetica et Cartographica Sinica,2015,44(1):19-25. |
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| Authors: | WANG Li ZHANG Qin TU Rui LIU Zhanke |
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| Affiliation: | 1. College of Geology Engineering and Geomantics, Chang'an University, Xi'an 710054, China;
2. Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China;
3. GFZ, Potsdam 14469, Germany;
4. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
5. The First Geodetic Surveying Brigade of National Administration of Surveying, Mapping and Geoinformation, Xi'an 710054, China |
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| Abstract: | A kind of single‐frequency precise point positioning (PPP) algorithm based on the raw observa‐tions is presented in this paper .By this algorithm ,the ionospheric delays were corrected efficiently by means of adding the ionospheric delay prior information and the virtual observation equations with the spati al and temporal constraints ,and they were estimated as the unknown parameters simultaneously with other positioning parameters .Then ,a dataset of 178 International GNSS Service (IGS) stations at day 72 in 2012 was used to evaluate the convergence speed , the positioning accuracy and the accuracy of the retrieved ionospheric VTEC .The series of results have shown that the convergence speed and stability of the new algorithm are much better than the traditional PPP algorithm ,and the positioning accuracy of about 2‐3 cm and 2‐3 dm can be achieved respectively for static and kinematic positioning with the single‐frequency observations’ daily solution .The average bias of ionospheric total electron content retrieved by the single‐frequency PPP and dual‐frequency PPP is less than 5 TECU .So the ionospheric total electron content can be used as a kind of auxili ary products in GPS positioning . |
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| Keywords: | single-frequency precise point positioning (PPP) raw observations ionospheric delay virtual observation equation |
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