Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Indexed in KCI (Korea Citation Index)
OPEN ACCESS, PEER REVIEWED
pISSN 2288-8187
eISSN 2289-0866

Accuracy Analysis of Predicted CODE GIM in the Korean Peninsula

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CONTENTS

Research article

Citation: Sim, E.-J., Park, K.-D., Park, J.-Y., & Park, B.-G. 2023, Accuracy Analysis of Predicted CODE GIM in the Korean Peninsula, Journal of Positioning, Navigation, and Timing, 12, 423-430.

Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 December, Volume 12, Issue 4, pages 423-430. https://doi.org/10.11003/JPNT.2023.12.4.423

Received on 06 September 2023, Revised on 10 October 2023, Accepted on 06 November 2023, Published on 15 December 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.

Accuracy Analysis of Predicted CODE GIM in the Korean Peninsula

Ei-Ju Sim1, Kwan-Dong Park1,2†, Jae-Young Park2, Bong-Gyu Park1

1Department of Geoinformatic Engineering, Inha University, Incheon 22212, Korea

2PP-Solution Inc., Seoul 08504, Korea

†Corresponding Author: E-mail, kdpark@inha.ac.kr; Tel, +82-032-873-4310; Fax, +82-32-863-1506

Abstract

One recent notable method for real-time elimination of ionospheric errors in geodetic applications is the Predicted Global Ionosphere Map (PGIM). This study analyzes the level of accuracy achievable when applying the PGIM provided by the Center for Orbit Determination of Europe (CODE) to the Korean Peninsula region. First, an examination of the types and lead times of PGIMs provided by the International GNSS Service (IGS) Analysis Center revealed that CODE’s two-day prediction model, C2PG, is available approximately eight hours before midnight. This suggests higher real-time usability compared to the oneday prediction model, C1PG. When evaluating the accuracy of PGIM by assuming the final output of the Global Ionosphere Map (GIM) as a reference, it was found that on days with low solar activity, the error is within ~2 TECU, and on days with high solar activity, the error reaches ~3 TECU. A comparison of the errors introduced when using PGIM and three solar activity indices—Kp index, F10.7, and sunspot number—revealed that F10.7 exhibits a relatively high correlation coefficient compared to Kp-index and sunspot number, confirming the effectiveness of the prediction model.

Keywords

GNSS, ionosphere, CODE GIM

References

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Acknowledgments

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음 (과제번호 RS-2022-00141819).

Author contributIons

All the authors have contributed to the presented work. K.D. conceived of the presented idea. E.J. performed the algorithm verification. J.Y. reviewed this work and edit the final manuscript. B.G. performed the tasks required for analysis. K.D. supervised the findings of this work.

Conflicts of interest

The authors declare no conflict of interest.