Acta Geodaetica et Cartographica Sinica >

2015 , Vol. 44 >Issue 1: 19 - 25

DOI: https://doi.org/10.11947/j.AGCS.2015.20130315

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

  • WANG Li ,
  • ZHANG Qin ,
  • TU Rui ,
  • LIU Zhanke
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  • 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 date: 2014-01-28

  Revised date: 2014-09-15

  Online 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)

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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

Cite this article

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 . DOI: 10.11947/j.AGCS.2015.20130315

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