Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Lee, Y., Lim, C., Cha, Y., Park, B., Park, S. G., & Park, S. H., 2023, Performance Analysis of GNSS Residual Error Bounding for QZSS CLAS, Journal of Positioning, Navigation, and Timing, 12, 215-228.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 September, Volume 12, Issue 3, pages 215-228. https://doi.org/10.11003/JPNT.2023.12.3.215
Received on 11 May 2023, Revised on 15 August 2023, Accepted on 26 August 2023, Published on 30 September 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.
Yebin Lee1, Cheolsoon Lim2, Yunho Cha1, Byungwoon Park1†, Sul Gee Park3, Sang Hyun Park3
1Department of Aerospace Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Korea
2Department of Aerospace Engineering, Sejong University, Seoul 05006, Korea
3Maritime PNT Research Office, Daejeon 34103, Korea
†Corresponding Author: E-mail, byungwoon@sejong.ac.kr; Tel: +82-2-3408-4385 Fax: +82-2-3408-4333
The State Space Representation (SSR) method provides individual corrections for each Global Navigation Satellite System (GNSS) error components. This method can lead to less bandwidth for transmission and allows selective use of each correction. Precise Point Positioning (PPP) – Real-Time Kinematic (RTK) is one of the carrier-based precise positioning techniques using SSR correction. This technique enables high-precision positioning with a fast convergence time by providing atmospheric correction as well as satellite orbit and clock correction. Currently, the positioning service that supports PPPRTK technology is the Quazi-Zenith Satellite System Centimeter Level Augmentation System (QZSS CLAS) in Japan. A system that provides correction for each GNSS error component, such as QZSS CLAS, requires monitoring of each error component to provide reliable correction and integrity information to the user. In this study, we conducted an analysis of the performance of residual error bounding for each error component. To assess this performance, we utilized the correction and quality indicators provided by QZSS CLAS. Performance analyses included the range domain, dispersive part, non-dispersive part, and satellite orbit/clock part. The residual root mean square (RMS) of CLAS correction for the range domain approximated 0.0369 m, and the residual RMS for both dispersive and non-dispersive components is around 0.0363 m. It has also been confirmed that the residual errors are properly bounded by the integrity parameters. However, the satellite orbit and clock part have a larger residual of about 0.6508 m, and it was confirmed that this residual was not bounded by the integrity parameters. Users who rely solely on satellite orbit and clock correction, particularly maritime users, thus should exercise caution when utilizing QZSS CLAS.
GNSS, SSR, QZSS, CLAS, monitoring system
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This research was supported by a grant from National R&D Project “Development of ground-based centimeterlevel maritime precise PNT technologies” funded by the Ministry of Oceans and Fisheries (1525013759).
The authors declare no conflict of interest.