Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Kim, B.-G., Kee, C., 2023, Preliminary Analysis of Precise Point Positioning Performance Using Correction of Tropospheric Delay Gradient, Journal of Positioning, Navigation, and Timing, 12, 141-148.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 June, Volume 12, Issue 2, pages 141-148. https://doi.org/10.11003/JPNT.2023.12.2.141
Received on 03 May 2023, Revised on 16 May 2023, Accepted on 25 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.
Bu-Gyeom Kim, Changdon Kee†
Department of Aerospace Engineering and SNU-IAMD, Seoul National University, Seoul 08826, Korea
†Corresponding Author: E-mail, kee@snu.ac.kr; Tel: +82-2-880-1912 Fax: +82-2-878-0559
In this paper, impacts of tropospheric delay gradient correction on PPP positioning performance were analyzed. A correction for tropospheric delay error due to the gradient was created and applied using external data, and reference station data were collected on a sunny day and a rainy day to analyze the GPS only dual-frequency PPP positioning results. As a result, on the sunny day, the convergence time was about 35 minutes and the final 3D position error was 10 cm, regardless of whether the correction for the tropospheric delay error by the gradient was applied. On the other hand, on the rainy day, the 3D position error converges only when the correction was applied, and the convergence time was about 34 minutes. Furthermore, the final 3D position error was improved from 30 cm to 10 cm. In addition, the analysis of the PPP by reference station location on the rainy day showed that the PPP positioning performance was improved when the correction was applied to a user located in an area where the weather changes.
GNSS, PPP, tropospheric delay, tropospheric delay gradient
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Conceptualization, B.G.; methodology, B.G.; software, B.G.; validation, B.G. and C.D.; formal analysis, B.G.; investigation, B.G.; resources, B.G.; data curation, B.G.; writing—original draft preparation, B.G.; writing—review and editing, B.G.; visualization, B.G.; supervision, C.D.; project administration, C.D.; funding acquisition, C.D.
The authors declare no conflict of interest.