Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Park, D., Lee, Y. J., 2023, A Modified Klobuchar Model Reflecting Characteristics of Ionospheric Delay Error in the Korea Region, Journal of Positioning, Navigation, and Timing, 12, 121-128.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 December, Volume 12, Issue 2, pages 121-128. https://doi.org/10.11003/JPNT.2023.12.2.121
Received on 21 Mar 2023, Revised on 11 May 2023, Accepted on 16 May 2023, Published on 30 June 2023.
License: Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/bync/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Dana Park, Young Jae Lee†
Department of Mechanical and Aerospace Engineering, Konkuk University, Seoul 05029, South Korea
†Corresponding Author: E-mail, younglee@konkuk.ac.kr; Tel: +82-2-450-3358
When calculating the user’s position using satellite signals, the signals originating from the satellite pass through the ionosphere and troposphere to the user. In particular, the ionosphere delay error that occurs when passing through the ionosphere delays when the signal is transmitted, generating a pseudorange error and position error at a large rate. Therefore, to improve position accuracy, it is essential to correct the ionosphere layer error. In a receiver capable of receiving dual frequency, the ionosphere error can be eliminated through a double difference, but in a single frequency receiver, an ionosphere correction model transmitted from a Global Navigation Satellite System (GNSS) satellite is used. The popularly used Klobuchar model is designed to improve performance globally. As such, it does not perform perfectly in the Korea region. In this paper, the characteristics of the delay in the ionosphere in the Korean region are identified through an analysis of 10 years of data, and an improved ionosphere correction model for the Korean region is presented using the widely employed Klobuchar model. Through the proposed model, vertical position error can be improved by up to 40% relative to the original Klobuchar model in the Korea region
GNSS, ionospheric delay correction, Klobuchar model, single frequency receiver
European Commission 2016, Galileo Open Service – Ionospheric Correction Algorithm for Galileo Single Frequency Receiver. https://www.gsc-europa.eu/ sites/default/files/sites/all/files/Galileo_Ionospheric_ Model.pdf
GNSS Data Center, reference station information [Internet], cited 2023 Mar 17, available from: https://gnssdata. or.kr/cors/getCorsView.do
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Klobuchar, J. A. 1987, Ionospheric time-delay algorithm for single-frequency GPS users, IEEE Transactions on aerospace and electronic systems, AES-23, 325-331. https://doi.org/10.1109/TAES.1987.310829
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Yoon, M. S., Ahn, J. S. & Joo, J.-M. 2021, A Residual Ionospheric Error Model for Single Frequency GNSS Users in the Korean Region, Journal of Advanced Navigation Technology, 25, 194-202. https://doi. org/10.12673/jant.2021.25.3.194
Conceptualization, D. Park. and Y. J. Lee.; methodology, D. Park. and Y. J. Lee.; software, D. Park. and Y. J. Lee.; validation, D. Park. and Y. J. Lee.; data curation, D. Park. and Y. J. Lee.; writing—original draft preparation, D. Park.; writing—review and editing, D. Park. and Y. J. Lee.; visualization, D. Park.; supervision, Y. J. Lee.; project administration, Y. J. Lee.; funding acquisition, Y. J. Lee.
The authors declare no conflict of interest.