Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products
With the evolving Global Navigation Satellite System (GNSS) landscape, the International GNSS Service (IGS) has started the Multi-GNSS Experiment (MGEX) to produce precise products for new generation systems. Various analysis centres are working on the estimation of precise orbits, clocks and bias f...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2018
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| Online Access: | https://eprints.nottingham.ac.uk/54999/ |
| _version_ | 1848799097157320704 |
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| author | Basile, Francesco Moore, Terry Hill, Chris |
| author_facet | Basile, Francesco Moore, Terry Hill, Chris |
| author_sort | Basile, Francesco |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | With the evolving Global Navigation Satellite System (GNSS) landscape, the International GNSS Service (IGS) has started the Multi-GNSS Experiment (MGEX) to produce precise products for new generation systems. Various analysis centres are working on the estimation of precise orbits, clocks and bias for Galileo, Beidou and Quasi-Zenith Satellite System (QZSS) satellites. However, at the moment these products can only be used for post-processing applications. Indeed, the IGS Real-Time service only broadcasts Global Positioning System (GPS) and Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS) corrections. In this research, a simulator of multi-GNSS observations and real-time precise products has been developed to analyse the performance of GPS-only, Galileo-only and GPS plus Galileo Precise Point Positioning (PPP). The error models in the simulated orbits and clocks were based on the difference between the GPS Real-Time and the Final products. Multiple scenarios were analysed, considering different signals combined in the Ionosphere Free linear combination. Results in a simulated open area environment show better performance of the Galileo-only case over the GPS-only case. Indeed, up 33% and 29% of improvement, respectively, in the accuracy level and convergence time can be observed when using the full Galileo constellation compared to GPS. The dual constellation case provides good improvements, in particular in the convergence time (47% faster than GPS). This paper will also consider the impact of different linear combinations of the Galileo signals, and the potential of the E5 Alternative Binary Offset Carrier (AltBOC) signal. Even though it is significantly more precise than E5a, the PPP performance obtained with the Galileo E1-E5a combination is either better or similar to the one with Galileo E1-E5. The reason for this inconsistency was found in the use of the ionosphere free combination with E1. Finally, alternative methods of ionosphere error mitigation are considered in order to ensure the best possible positioning performance from the Galileo E5 signal in multi-frequency PPP. |
| first_indexed | 2025-11-14T20:30:15Z |
| format | Article |
| id | nottingham-54999 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:30:15Z |
| publishDate | 2018 |
| publisher | Cambridge University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-549992019-02-21T04:30:18Z https://eprints.nottingham.ac.uk/54999/ Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products Basile, Francesco Moore, Terry Hill, Chris With the evolving Global Navigation Satellite System (GNSS) landscape, the International GNSS Service (IGS) has started the Multi-GNSS Experiment (MGEX) to produce precise products for new generation systems. Various analysis centres are working on the estimation of precise orbits, clocks and bias for Galileo, Beidou and Quasi-Zenith Satellite System (QZSS) satellites. However, at the moment these products can only be used for post-processing applications. Indeed, the IGS Real-Time service only broadcasts Global Positioning System (GPS) and Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS) corrections. In this research, a simulator of multi-GNSS observations and real-time precise products has been developed to analyse the performance of GPS-only, Galileo-only and GPS plus Galileo Precise Point Positioning (PPP). The error models in the simulated orbits and clocks were based on the difference between the GPS Real-Time and the Final products. Multiple scenarios were analysed, considering different signals combined in the Ionosphere Free linear combination. Results in a simulated open area environment show better performance of the Galileo-only case over the GPS-only case. Indeed, up 33% and 29% of improvement, respectively, in the accuracy level and convergence time can be observed when using the full Galileo constellation compared to GPS. The dual constellation case provides good improvements, in particular in the convergence time (47% faster than GPS). This paper will also consider the impact of different linear combinations of the Galileo signals, and the potential of the E5 Alternative Binary Offset Carrier (AltBOC) signal. Even though it is significantly more precise than E5a, the PPP performance obtained with the Galileo E1-E5a combination is either better or similar to the one with Galileo E1-E5. The reason for this inconsistency was found in the use of the ionosphere free combination with E1. Finally, alternative methods of ionosphere error mitigation are considered in order to ensure the best possible positioning performance from the Galileo E5 signal in multi-frequency PPP. Cambridge University Press 2018-08-20 Article PeerReviewed application/pdf en https://eprints.nottingham.ac.uk/54999/1/JoN%20INC%20paper%20Revised_Final.pdf Basile, Francesco, Moore, Terry and Hill, Chris (2018) Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products. Journal of Navigation . pp. 1-15. ISSN 1469-7785 http://dx.doi.org/10.1017/s0373463318000577 doi:10.1017/s0373463318000577 doi:10.1017/s0373463318000577 |
| spellingShingle | Basile, Francesco Moore, Terry Hill, Chris Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title | Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title_full | Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title_fullStr | Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title_full_unstemmed | Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title_short | Analysis on the potential performance of GPS and Galileo Precise Point Positioning using simulated Real-Time Products |
| title_sort | analysis on the potential performance of gps and galileo precise point positioning using simulated real-time products |
| url | https://eprints.nottingham.ac.uk/54999/ https://eprints.nottingham.ac.uk/54999/ https://eprints.nottingham.ac.uk/54999/ |