Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions
The orbital inclination angle of the GLONASS constellation is about 10° larger than that of GPS, Galileo, and BDS. Theoretically, the higher orbital inclination angle could provide better observation geometry in high latitude regions. A wealth of research has investigated the positioning accuracy of...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/18/4640 |
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| author | Yanli Zheng Fu Zheng Cheng Yang Guigen Nie Shuhui Li |
| author_facet | Yanli Zheng Fu Zheng Cheng Yang Guigen Nie Shuhui Li |
| author_sort | Yanli Zheng |
| collection | DOAJ |
| description | The orbital inclination angle of the GLONASS constellation is about 10° larger than that of GPS, Galileo, and BDS. Theoretically, the higher orbital inclination angle could provide better observation geometry in high latitude regions. A wealth of research has investigated the positioning accuracy of GLONASS and its impact on multi-GNSS, but rarely considered the contribution of the GLONASS constellation’s large orbit inclination angle. The performance of GLONASS in different latitude regions is evaluated in both stand-alone mode and integration with GPS in this paper. The performance of GPS is also presented for comparison. Three international GNSS service (IGS) networks located in high, middle, and low latitudes are selected for the current study. Multi-GNSS data between January 2021 and June 2021 are used for the assessment. The data quality check shows that the GLONASS data integrity is significantly lower than that of GPS. The constellation visibility analysis indicates that GLONASS has a much better elevation distribution than GPS in high latitude regions. Both daily double-difference network solutions and daily static Precise Point Positioning (PPP) solutions are evaluated. The statistical analysis of coordinate estimates indicates that, in high latitude regions, GLONASS has a comparable or even better accuracy than that of GPS, and GPS+GLONASS presents the best estimate accuracy; in middle latitude regions, GPS stand-alone constellation provides the best positioning accuracy; in low latitude regions, GLONASS offers the worst accuracy, but the positioning accuracy of GPS+GLONASS is better than that of GPS. The tropospheric estimates of GLONASS do not present a resemblance regional advantage as coordinate estimates, which is worse than that of GPS in all three networks. The PPP processing with combined GPS and GLONASS observations reduces the convergence time and improves the accuracy of tropospheric estimates in all three networks. |
| first_indexed | 2024-03-09T22:37:34Z |
| format | Article |
| id | doaj.art-40d5b6e679254b08a2daf03290b14f6f |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T22:37:34Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-40d5b6e679254b08a2daf03290b14f6f2023-11-23T18:46:05ZengMDPI AGRemote Sensing2072-42922022-09-011418464010.3390/rs14184640Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude RegionsYanli Zheng0Fu Zheng1Cheng Yang2Guigen Nie3Shuhui Li4School of Land Science and Technology, China University of Geosciences, Beijing 100083, ChinaResearch Institute for Frontier Science, Beihang University, Beijing 100191, ChinaSchool of Land Science and Technology, China University of Geosciences, Beijing 100083, ChinaGNSS Research Center, Wuhan University, Wuhan 430079, ChinaSchool of Land Science and Technology, China University of Geosciences, Beijing 100083, ChinaThe orbital inclination angle of the GLONASS constellation is about 10° larger than that of GPS, Galileo, and BDS. Theoretically, the higher orbital inclination angle could provide better observation geometry in high latitude regions. A wealth of research has investigated the positioning accuracy of GLONASS and its impact on multi-GNSS, but rarely considered the contribution of the GLONASS constellation’s large orbit inclination angle. The performance of GLONASS in different latitude regions is evaluated in both stand-alone mode and integration with GPS in this paper. The performance of GPS is also presented for comparison. Three international GNSS service (IGS) networks located in high, middle, and low latitudes are selected for the current study. Multi-GNSS data between January 2021 and June 2021 are used for the assessment. The data quality check shows that the GLONASS data integrity is significantly lower than that of GPS. The constellation visibility analysis indicates that GLONASS has a much better elevation distribution than GPS in high latitude regions. Both daily double-difference network solutions and daily static Precise Point Positioning (PPP) solutions are evaluated. The statistical analysis of coordinate estimates indicates that, in high latitude regions, GLONASS has a comparable or even better accuracy than that of GPS, and GPS+GLONASS presents the best estimate accuracy; in middle latitude regions, GPS stand-alone constellation provides the best positioning accuracy; in low latitude regions, GLONASS offers the worst accuracy, but the positioning accuracy of GPS+GLONASS is better than that of GPS. The tropospheric estimates of GLONASS do not present a resemblance regional advantage as coordinate estimates, which is worse than that of GPS in all three networks. The PPP processing with combined GPS and GLONASS observations reduces the convergence time and improves the accuracy of tropospheric estimates in all three networks.https://www.mdpi.com/2072-4292/14/18/4640GLONASSGPSdouble-differencedstatic PPP |
| spellingShingle | Yanli Zheng Fu Zheng Cheng Yang Guigen Nie Shuhui Li Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions Remote Sensing GLONASS GPS double-differenced static PPP |
| title | Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions |
| title_full | Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions |
| title_fullStr | Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions |
| title_full_unstemmed | Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions |
| title_short | Analyses of GLONASS and GPS+GLONASS Precise Positioning Performance in Different Latitude Regions |
| title_sort | analyses of glonass and gps glonass precise positioning performance in different latitude regions |
| topic | GLONASS GPS double-differenced static PPP |
| url | https://www.mdpi.com/2072-4292/14/18/4640 |
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