Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Seok, H.-W., Cho, S., Kong, S.-H., Joo, J.-M., & Lim, J., 2023, A Survey on LEO-PNT Systems, Journal of Positioning, Navigation, and Timing, 12, 323-332.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 September, Volume 12, Issue 3, pages 323-332. https://doi.org/10.11003/JPNT.2023.12.3.323
Received on 19 August 2023, Revised on 27 August 2023, Accepted on 02 September 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.
Hong-Woo Seok1, Sangjae Cho1, Seung-Hyun Kong1†, Jung-Min Joo2, Jongwon Lim2
1CCS Graduate School of Mobility, Korea Advanced Institute of Science & Technology, Daejeon 34051, South Korea
2KPS R&D Directorate, Korea Aerospace Research Institute, Daejeon 34133, South Korea
†Corresponding Author: E-mail, skong@kaist.ac.kr; Tel: +82-42-350-1265 Fax: +82-42-350-1250
Today, services using Positioning, Navigation, and Timing (PNT) technology are provided in various fields, such as smartphone Location-Based Service (LBS) and autonomous driving. Generally, outdoor positioning techniques depend on the Global Navigation Satellite System (GNSS), and the need for positioning techniques that guarantee positioning accuracy, availability, and continuity is emerging with advances in service. In particular, continuity is not guaranteed in urban canyons where it is challenging to secure visible satellites with standalone GNSS, and even if more than four satellites are visible, the positioning accuracy and stability are reduced due to multipath channels. Research using Low Earth Orbit (LEO) satellites is already underway to overcome these limitations. In this study, we conducted a trend analysis of LEO-PNT research, an LEO satellitebased navigation and augmentation system. Through comparison with GNSS, the differentiation of LEO-PNT was confirmed, and the system design and receiver processing were analyzed according to LEO-PNT classification. Lastly, the current status of LEO-PNT development by country and institution was confirmed.
LEO, PNT, alternative-PNT, GNSS
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Conceptualization, H.S. and S.C.; formal analysis, H.S. and S.C.; investigation, H.S.; writing—original draft preparation, H.S and S.C.; writing—review and editing, H.S., S.C., J.J., and J.L.; supervision, S.K.; project administration, S.K.; funding acquisition, S.K.
The authors declare no conflict of interest.