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The benefit of Galileo E6 signals and their application in the real-time instantaneous decimeter-level precise point positioning with ambiguity resolution.
- Source :
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Advances in Space Research . May2022, Vol. 69 Issue 9, p3319-3332. 14p. - Publication Year :
- 2022
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Abstract
- With the development of commercial services in the European Union, the advanced designs of Galileo E6 signals can be freely offered to Global Navigation Satellite System (GNSS) users. However, only a few studies have analyzed the benefit of Galileo E6 signals, and their application in the real-time instantaneous precise point positioning (PPP) with ambiguity resolution (AR) has not been investigated. In this study, based on the triple-frequency ionosphere-free combination, the positioning performance of instantaneous decimeter-level PPP AR was assessed with real-time orbit, clock and phase biases provided by the Centre National d'Études Spatiales Navigation Team (CNES/NAV). Experimenting on the GPS/Galileo observations from the 42 globally distributed stations, the wide-lane (WL) ambiguity residuals within ± 0.25 cycle for GPS L1/L2/L5, Galileo E1/E5a/E5b and E1/E5a/E6 frequency combinations were 92.54%, 90.72% and 96.48% with single-epoch data, respectively. When the WL ambiguities are fixed instantaneously, owing to the low combination noise of Galileo E1/E5a/E6, the positioning performance of instantaneous PPP AR with GPS/Galileo (E1/E5a/E6 used) outperforms that of GPS/Galileo (E1/E5a/E5b used). If the position dilution of precision is <1.5, the Root Mean Square (RMS) of GPS/Galileo (E1/E5a/E6 used) for east, north and up components are 0.13 m, 0.13 m and 0.57 m, respectively, while those of GPS/Galileo (E1/E5a/E5b used) are 0.17 m, 0.19 m and 0.62 m, respectively. Moreover, the WL ambiguity fixing rate of GPS/Galileo (E1/E5a/E6 used) is higher than that of GPS/Galileo (E1/E5a/E5b used), which shows an improvement of approximately 9% in the relatively low satellite elevation angles (20°< elevation angle < 40°). The results indicate that the Galileo E6 signal can bring a significant improvement in real-time instantaneous decimeter-level PPP AR. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02731177
- Volume :
- 69
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Advances in Space Research
- Publication Type :
- Academic Journal
- Accession number :
- 156050370
- Full Text :
- https://doi.org/10.1016/j.asr.2022.02.029