基于原始观测值的单频精密单点定位算法

doi:10.11947/j.AGCS.2015.20130315

测绘学报 ›› 2015, Vol. 44 ›› Issue (1): 19-25.doi: 10.11947/j.AGCS.2015.20130315

基于原始观测值的单频精密单点定位算法

王利^1,2, 张勤^1,2, 涂锐³, 刘站科^4,5

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

收稿日期:2014-01-28 修回日期:2014-09-15 出版日期:2015-01-20 发布日期:2015-01-22
通讯作者: 张勤 E-mail:zhangqinle@263.net.cn
作者简介:王利(1975-), 男, 博士, 副教授, 研究方向为GPS精密定位和变形监测理论与应用. E-mail: wangli@chd.edu.cn
基金资助:
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)

A Kind of Single-frequency Precise Point Positioning Algorithm Based on the Raw Observations

WANG Li^1,2, ZHANG Qin^1,2, TU Rui³, LIU Zhanke^4,5

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

Received:2014-01-28 Revised:2014-09-15 Online:2015-01-20 Published:2015-01-22
Supported by:
The National Natural Science Foundation of China(Nos.40902081 41104019 41274005 41202189) The Project of State Land Resources Survey of China(Nos.1212011220186 1212011220142 12120114079101) The Fundamental Research Founds for the Central Universities(Nos.2013G2263003 2013G3264003 2013G3264004)

摘要/Abstract

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2~3 cm、模拟动态单频单天PPP解的精度可达2~3 dm,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.

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

Abstract:

A kind of single-frequency precise point positioning (PPP) algorithm based on the raw observations 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 spatial 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 auxiliary products in GPS positioning.

Key words: single-frequency precise point positioning (PPP), raw observations, ionospheric delay, virtual observation equation

中图分类号:

P228

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.

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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基于原始观测值的单频精密单点定位算法

A Kind of Single-frequency Precise Point Positioning Algorithm Based on the Raw Observations

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