Startseite Technik GNSS positioning accuracy performance assessments on 1st and 2nd generation SBAS signals in Thailand
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GNSS positioning accuracy performance assessments on 1st and 2nd generation SBAS signals in Thailand

  • Phunsap Thari , Thayathip Thongtan und Chalermchon Satirapod EMAIL logo
Veröffentlicht/Copyright: 6. Dezember 2023
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Journal of Applied Geodesy
Aus der Zeitschrift Journal of Applied Geodesy Band 18 Heft 3

Abstract

This research evaluates the performance of the first and second-generation satellite-based augmentation system (SBAS) GAGAN and BDSBAS services in Thailand. The study initially analyses GNSS observations from 40 local continuously operating reference stations (CORS) over the past 12 months in 2022, providing initial horizontal and vertical accuracies at 2.03 and 3.66 m respectively with the single point positioning (SPP) mode. The positioning accuracies are 2.27 m horizontally and 2.54 m vertically as of GAGAN, while 2.94 m horizontally and 3.90 m vertically as of BDSBAS with the first-generation system. Since the 1st generation SBAS performance is affected by the ionosphere, especially in the equatorial and auroral regions, the ionosphere-free combination is applied in the SPP algorithm as well as the 2nd generation SBAS with the Dual-Frequency Multi-Constellation (DFMC) capable receivers for BDSBAS only. The SPP accuracies are 1.51 m horizontally and 3.26 m vertically, where the BDSBAS results are 2.16 m horizontally and 4.28 m vertically. Demonstrated results show that the positioning accuracy cannot be improved significantly when applying the 1st generation GAGAN and BDSBAS systems and the 2nd generation BDSBAS system in Thailand due to the low number of common satellites available, especially when using the SBAS outside their ground tracking network; therefore, it is expected to apply the GNSS observation and computed satellite error correction from the regional ground tracking network to enhance the performance of the 2nd generation SBAS. The positioning accuracy result could be achieved at sub-metre level, which will greatly benefit high-accuracy applications such as air, land, and sea navigation in the region.

Keywords: GNSS; SBAS; GAGAN; BDSBAS; ionosphere-free combination
Corresponding author: Chalermchon Satirapod, Department of Survey Engineering, Chulalongkorn University, Bangkok 10330, Thailand, E-mail:

Acknowledgment

The authors would like to thank the Royal Thai Survey Department for providing the GNSS CORS data used in this research.

  1. Research ethics: Not applicable.

  2. Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: The authors state no conflict of interest.

  4. Research funding: None declared.

  5. Data availability: Not applicable.

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Received: 2023-09-23
Accepted: 2023-10-26
Published Online: 2023-12-06
Published in Print: 2024-07-26

© 2023 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Original Research Articles
  3. Ionospheric TEC modeling using COSMIC-2 GNSS radio occultation and artificial neural networks over Egypt
  4. Regional GPS orbit determination using code-based pseudorange measurement with residual correction model
  5. Analysis of different combinations of gravity data types in gravimetric geoid determination over Bali
  6. Assessment of satellite images terrestrial surface temperature and WVP using GNSS radio occultation data
  7. GNSS positioning accuracy performance assessments on 1st and 2nd generation SBAS signals in Thailand
  8. Differential synthetic aperture radar (SAR) interferometry for detection land subsidence in Derna City, Libya
  9. Advanced topographic-geodetic surveys and GNSS methodologies in urban planning
  10. Detection of GNSS ionospheric scintillations in multiple directions over a low latitude station
  11. Spatiotemporal postseismic due to the 2018 Lombok earthquake based on insar revealed multi mechanisms with long duration afterslip
  12. Practical implications in the interpolation methods for constructing the regional mean sea surface model in the eastern Mediterranean Sea
  13. Validation of a tailored gravity field model for precise quasigeoid modelling over selected sites in Cameroon and South Africa
  14. Evaluation of ML-based classification algorithms for GNSS signals in ocean environment
  15. Development of a hybrid geoid model using a global gravity field model over Sri Lanka
  16. Implementation of GAGAN augmentation on smart mobile devices and development of a cooperative positioning architecture
  17. On the GPS signal multipath at ASG-EUPOS stations
https://doi.org/10.1515/jag-2023-0082
Schlagwörter für diesen Artikel
GNSS; SBAS; GAGAN; BDSBAS; ionosphere-free combination

Artikel in diesem Heft

  1. Frontmatter
  2. Original Research Articles
  3. Ionospheric TEC modeling using COSMIC-2 GNSS radio occultation and artificial neural networks over Egypt
  4. Regional GPS orbit determination using code-based pseudorange measurement with residual correction model
  5. Analysis of different combinations of gravity data types in gravimetric geoid determination over Bali
  6. Assessment of satellite images terrestrial surface temperature and WVP using GNSS radio occultation data
  7. GNSS positioning accuracy performance assessments on 1st and 2nd generation SBAS signals in Thailand
  8. Differential synthetic aperture radar (SAR) interferometry for detection land subsidence in Derna City, Libya
  9. Advanced topographic-geodetic surveys and GNSS methodologies in urban planning
  10. Detection of GNSS ionospheric scintillations in multiple directions over a low latitude station
  11. Spatiotemporal postseismic due to the 2018 Lombok earthquake based on insar revealed multi mechanisms with long duration afterslip
  12. Practical implications in the interpolation methods for constructing the regional mean sea surface model in the eastern Mediterranean Sea
  13. Validation of a tailored gravity field model for precise quasigeoid modelling over selected sites in Cameroon and South Africa
  14. Evaluation of ML-based classification algorithms for GNSS signals in ocean environment
  15. Development of a hybrid geoid model using a global gravity field model over Sri Lanka
  16. Implementation of GAGAN augmentation on smart mobile devices and development of a cooperative positioning architecture
  17. On the GPS signal multipath at ASG-EUPOS stations
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