Application of Stochastic Model in GPS Satellite Clock Estimation

被引：0
|
作者：
Li H. [1 ]
Ye Z. [1 ]
机构：
[1] College of Surveying and Geo-Informatics, Tongji University, Shanghai
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2021年 / 49卷 / 04期
关键词：
Precise point positioning (PPP); Satellite clock; Stochastic model;
D O I：
10.11908/j.issn.0253-374x.20086
中图分类号：
学科分类号：
摘要：
Satellite clock affects the positioning accuracy the most. Based on a study of the pseudorange observation accuracy of different receivers and corresponding phase variance, a reasonable stochastic model was established. The GPS data from 56 IGS stations were connected to estimate the satellite clock and to analyze the positioning performance. The estimation results of the satellite clock based on this method prove to the positioning accuracy improve about 5% in comparison with the traditional clock estimation method. The stochastic model was employed to the positioning solution using the IGS satellite clock. Within 10 stations, the convergence time and positioning accuracy of 7 stations improved significantly. Compared with the traditional fixed weight method, the convergence time improves about 78% the most, and the positioning accuracy improves about 86.55% the most. © 2021, Editorial Department of Journal of Tongji University. All right reserved.
引用
收藏
页码：554 / 560
页数：6
相关论文
共 17 条
  • [1] BOCK H, DACH R, JAGGI A, Et al., High-rate GPS clock corrections from CODE: support of 1 Hz applications, Journal of Geodesy, 83, 11, (2009)
  • [2] DOW J, NEILAN R, RIZOS C., The international GNSS service in a changing landscape of global navigation satellite systems, Journal of Geodesy, 83, 3, (2009)
  • [3] GE M, CHEN J, DOUSA J, Et al., A computationally efficient approach for estimating high-rate satellite clock corrections in realtime, GPS Solutions, 16, 1, (2012)
  • [4] HAN S, KWON J, JEKELI C., Accurate absolute GPS positioning through satellite clock error estimation, Journal of Geodesy, 75, 1, (2001)
  • [5] HAUSCHILD A, MONTENBRUCK O., Kalman-filter-based GPS clock estimation for near real-time positioning, GPS Solutions, 13, 3, (2009)
  • [6] LI H, CHEN J, WANG J, Et al., Network based real-time precise point positioning, Advances in Space Research, 46, 9, (2010)
  • [7] LI H, LI B, XIAO G, Et al., Improved method for estimating the inter-frequency satellite clock bias of triple-frequency GPS, GPS Solutions, 20, 4, (2016)
  • [8] LI H, LI B, LOU L, Et al., Impact of GPS differential code bias in dual- and triple-frequency positioning and satellite clock estimation, GPS Solutions, 21, 3, (2017)
  • [9] LI H, ZHU W, ZHAO R, Et al., Service and evaluation of the GPS triple-frequency satellite clock offset, The Journal of Navigation, 71, 5, (2018)
  • [10] LI H, XIAO J, LI B., Evaluation and application of the GPS code observable in precise point positioning, The Journal of Navigation, (2019)
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