Correction of Time and Coordinate Systems for Interoperability of Multi-GNSS
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GNSS receivers capable of tracking multiple Global Navigation Systems (GNSSs) simultaneously are widely used. In order to estimate accurate user position and velocity, it is necessary to consider the key elements that contribute to the interoperability of the different GNSSs. Typical examples are the time system and the coordinate system. Each GNSS is operated based on its own reference time system depending on when the system was developed and whether the leap seconds are applied. In addition, each GNSS is designed based on its own coordinate system based on earth model constant values. This paper addresses the interoperability issues from the viewpoint of Single Point Positioning (SPP) users utilizing multiple GNSS signals from GPS, GLONASS, BeiDou, and Galileo. Since the broadcast ephemerides of each GNSS are based on their own time and coordinate systems, the time and the coordinate systems should be unified for any user algorithm. For this purpose, this paper proposes a method of converting each GNSS coordinate system into the reference coordinate system through Helmert transformation. The error of the broadcast ephemerides was calculated with the precise ephemerides provided by the International GNSS Service (IGS). The effectiveness of the proposed multi-GNSS correction and transformation method is verified using the Multi-GNSS Experiment (MGEX) station data.
Abstract
GNSS receivers capable of tracking multiple Global Navigation Systems (GNSSs) simultaneously are widely used. In order to estimate accurate user position and velocity, it is necessary to consider the key elements that contribute to the interoperability of the different GNSSs. Typical examples are the time system and the coordinate system. Each GNSS is operated based on its own reference time system depending on when the system was developed and whether the leap seconds are applied. In addition, each GNSS is designed based on its own coordinate system based on earth model constant values. This paper addresses the interoperability issues from the viewpoint of Single Point Positioning (SPP) users utilizing multiple GNSS signals from GPS, GLONASS, BeiDou, and Galileo. Since the broadcast ephemerides of each GNSS are based on their own time and coordinate systems, the time and the coordinate systems should be unified for any user algorithm. For this purpose, this paper proposes a method of converting each GNSS coordinate system into the reference coordinate system through Helmert transformation. The error of the broadcast ephemerides was calculated with the precise ephemerides provided by the International GNSS Service (IGS). The effectiveness of the proposed multi-GNSS correction and transformation method is verified using the Multi-GNSS Experiment (MGEX) station data.
참고문헌 (25)
- Zuheir Altamimi, "ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions", Journal of Geophysical Research: Solid Earth, 121(8), pp.6109~6131 (2016), American Geophysical Union (AGU)[DOI]
- CURTIS COHENOUR, "GPS Orbit and Clock Error Distributions", Navigation, 58(1), pp.17~28 (2011), Institute of Navigation[DOI]
- IERS Annual Report 2018, "Dick, W. R.", International Earth Rotation and Reference Systems Service, ~ (2020)
- John M. Dow, "The International GNSS Service in a changing landscape of Global Navigation Satellite Systems", Journal of Geodesy, 83(3-4), pp.191~198 (2009), Springer Science and Business Media LLC[DOI]
- Duan, K., "GPS", GLONASS, 2017 24th Saint Petersburg International Conference on Integrated Navigation Systems (ICINS), pp.2017[DOI]
- H. T. Elshambaky, "A novel three-direction datum transformation of geodetic coordinates for Egypt using artificial neural network approach", Arabian Journal of Geosciences, 11(6) (2018), Springer Science and Business Media LLC[DOI]
- Jake Griffiths, "Combined orbits and clocks from IGS second reprocessing", Journal of Geodesy, 93(2), pp.177~195 (2019), Springer Science and Business Media LLC[DOI]
- Hidekazu Hachisu, "Absolute frequency measurement with uncertainty below $$1\times 10^{-15}$$ using International Atomic Time", Applied Physics B, 123(1) (2017), Springer Science and Business Media LLC[DOI]
- "MGEX Product Analysis" (2021)[URL]
- "Products" (2021)[URL]
- Lewandowski, W., "GNSS times and UTC", Metrologia, 48, pp.S219~ (2011)[DOI]
- W. Lewandowski, "GPS time transfer", Proceedings of the IEEE, 79(7), pp.991~1000 (1991), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Xiaping Ma, "Positioning Performance Comparison Between GPS and BDS With Data Recorded at Four MGEX Stations", IEEE Access, 8, pp.147422~147438 (2020), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Stephen Malys, "Compatibility of Terrestrial Reference Frames used in GNSS broadcast messages during an 8 week period of 2019", Advances in Space Research, 67(2), pp.834~844 (2021), Elsevier BV[DOI]
- O. Montenbruck, "GNSS satellite geometry and attitude models", Advances in Space Research, 56(6), pp.1015~1029 (2015), Elsevier BV[DOI]
- Oliver Montenbruck, "Broadcast versus precise ephemerides: a multi-GNSS perspective", GPS Solutions, 19(2), pp.321~333 (2015), Springer Science and Business Media LLC[DOI]
- Luca Nicolini, "Investigation on Reference Frames and Time Systems in Multi-GNSS", Remote Sensing, 10(2), pp.80~ (2018), MDPI AG[DOI]
- M.R. Pearlman, "The International Laser Ranging Service", Advances in Space Research, 30(2), pp.135~143 (2002), Elsevier BV[DOI]
- Paul Rebischung, "The IGS contribution to ITRF2014", Journal of Geodesy, 90(7), pp.611~630 (2016), Springer Science and Business Media LLC[DOI]
- H. Schuh, "VLBI: A fascinating technique for geodesy and astrometry", Journal of Geodynamics, 61, pp.68~80 (2012), Elsevier BV[DOI]
- Ke Su, "Evaluation of Ionospheric Delay Effects on Multi-GNSS Positioning Performance", Remote Sensing, 11(2), pp.171~ (2019), MDPI AG[DOI]
- Warren, D. L., "Broadcast vs precise GPS ephemerides: a historical perspective", Proceedings of the 2002 National Technical Meeting of The Institute of Navigation, pp.733~741 (2002)
- "Geodetic Transformations, MATLAB Central File Exchange" (2018)[URL]
- Yang, X., "Random optimization algorithm on GNSS monitoring stations selection for ultra-rapid orbit determination and real-time satellite clock offset estimation", Mathematical Problems in Engineering (2019)[DOI]
- 윤성현, "공간정보의 측지기준체계 변환 기법 도출에 관한 연구", 한국측량학회지, 38(6), pp.561~571 (2020), 한국측량학회[DOI]