Galileo HAS와 IGS RTS의 보정정보 비교 및 Galileo HAS 기반 GNSS 측위 알고리즘 개발
Comparison of Galileo HAS and IGS RTS Corrections and Development of a Galileo HAS Based GNSS Positioning Algorithm
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The International GNSS Service (IGS) provides real-time satellite orbit, clock, and bias corrections through its Real-Time Service (RTS). In addition, Galileo has offered the Galileo High Accuracy Service (HAS) since January 24, 2023, further improving positioning accuracy for GPS and Galileo satellites. HAS data are available through Galileo's E6 signal and Ntrip, enhancing positioning accuracy for GPS and Galileo satellites. This study compared Galileo HAS corrections data and IGS RTS corrections data obtained from the BKG Ntrip client (BNC) on February 1 and June 23, 2024. The orbit, clock, and bias corrections of each satellite were analyzed, revealing that HAS and IGS RTS correction values followed similar trends for most satellites. Additionally, satellite position and clock values computed from these corrections were compared with SP3 and CLK data for accuracy. To perform positioning using HAS, a Code-PPP algorithm was developed, and positioning accuracy was evaluated for GPS-only, Galileo-only, and multi-constellation modes using both GPS and Galileo. Tropospheric errors were mitigated using the Global Model of Pressure and Temperature (GPT) with the Global Mapping Function (GMF), and ionospheric corrections were applied using the Global Ionospheric Map (GIM). As a result, sub-meter level positioning accuracy was achieved. Among the correction types, IGS RTS corrections provided better accuracy for GPS-only measurements, while Galileo HAS corrections yielded superior accuracy for Galileo-only positioning.
Abstract
The International GNSS Service (IGS) provides real-time satellite orbit, clock, and bias corrections through its Real-Time Service (RTS). In addition, Galileo has offered the Galileo High Accuracy Service (HAS) since January 24, 2023, further improving positioning accuracy for GPS and Galileo satellites. HAS data are available through Galileo's E6 signal and Ntrip, enhancing positioning accuracy for GPS and Galileo satellites. This study compared Galileo HAS corrections data and IGS RTS corrections data obtained from the BKG Ntrip client (BNC) on February 1 and June 23, 2024. The orbit, clock, and bias corrections of each satellite were analyzed, revealing that HAS and IGS RTS correction values followed similar trends for most satellites. Additionally, satellite position and clock values computed from these corrections were compared with SP3 and CLK data for accuracy. To perform positioning using HAS, a Code-PPP algorithm was developed, and positioning accuracy was evaluated for GPS-only, Galileo-only, and multi-constellation modes using both GPS and Galileo. Tropospheric errors were mitigated using the Global Model of Pressure and Temperature (GPT) with the Global Mapping Function (GMF), and ionospheric corrections were applied using the Global Ionospheric Map (GIM). As a result, sub-meter level positioning accuracy was achieved. Among the correction types, IGS RTS corrections provided better accuracy for GPS-only measurements, while Galileo HAS corrections yielded superior accuracy for Galileo-only positioning.
참고문헌 (13)
- Boehm, J., "Short note : a global model of pressure and temperature for geodetic applications", Journal of Geodesy, 81, pp.679~683 (2007)[DOI]
- "Galileo high accuracy service (HAS)" (2023)[URL]
- Hadas, T., "IGS RTS precise orbits and clocks verification and quality degradation over time", GPS Solutions, 19, pp.93~105 (2015)[DOI]
- Hauschild, A., "Orbit determination of Sentinel-6A using the Galileo high accuracy service test signal", GPS Solutions, 26, pp.120~ (2022)[DOI]
- "RTS Monitoring"[URL]
- Kang, M. -W., "Accuracy Evaluation of IGS-RTS Corrections to Stand-Alone Positioning Based on GPS Code-Pseudorange Measurements", JPNT, 5, pp.59~66 (2016)[DOI]
- Kim, M. S., "Development of PPP Algorithms based on GPS Code Pseudoranges by Applying Real-Time SSR Corrections", Master, pp.2016
- Lee, H. C., "Development of GNSS Precise Point Positioning Algorithm Based on Real-time CLAS Messages Provided by QZSS", Master, pp.2021
- Lee, H. C., "Development of Code-PPP Based on Multi-GNSS Using Compact SSR of QZSS-CLAS, Journal of the Korean Society of Surveying, Geodesy", Photogrammetry and Cartography, 38, pp.521~531 (2020)[DOI]
- Martini, I., "Satellite Anomaly Detection with PPP Corrections: A Case Study with Galileo’s High Accuracy Service", Proceedings of the 2022 International Technical Meeting of The Institute of Navigation, pp.1246~1262 (2022)
- Misra, P., "Global Positioning System: Signals, Measurements, and Performance" (2006), Ganga-Jamuna Press
- Naciri, N., "Assessment of Galileo High Accuracy Service(HAS)test signals and preliminary positioning performance", GPS Solutions, 27, pp.73~ (2023)[DOI]
- Zumberge, J. F., "Precise point positioning for the efficient and robust analysis of GPS data from large networks", JGR, 102, pp.5005~5017 (1997)[DOI]