The proposal to “snapshot” raim method for GNSS vessel receivers working in poor space segment geometry

• Autorzy: Nowak A.
• Języki publikacji: EN

Abstrakty

EN

Nowadays, we can observe an increase in research on the use of small unmanned autonomous vessel (SUAV) to patrol and guiding critical areas including harbours. The proposal to “snapshot” RAIM (Receiver Autonomous Integrity Monitoring) method for GNSS receivers mounted on SUAV operating in poor space segment geometry is presented in the paper. Existing “snapshot” RAIM methods and algorithms which are used in practical applications have been developed for airborne receivers, thus two main assumptions have been made. The first one is that the geometry of visible satellites is strong. It means that the exclusion of any satellite from the positioning solution don’t cause significant deterioration of Dilution of Precision (DOP) coefficients. The second one is that only one outlier could appear in pseudorange measurements. In case of SUAV operating in harbour these two assumptions cannot be accepted. Because of their small dimensions, GNSS antenna is only a few decimetres above sea level and regular ships, buildings and harbour facilities block and reflect satellite signals. Thus, different approach to “snapshot” RAIM is necessary. The proposal to method based on analyses of allowable maximal separation of positioning sub-solutions with using some information from EGNOS messages is described in the paper. Theoretical assumptions and results of numerical experiments are presented.

Słowa kluczowe

EN

GNSS; RAIM; navigation; Autonomous Vessels

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2015
• Tom: nr 4
• Strony: 3--8
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Nowak A.

• Gdansk University of Technology, G. Narutowicza 11/12 St., 80-233 Gdansk Poland, tel.: [phone]

Bibliografia

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• 5. R.G. Brown: Receiver Autonomous Integrity Monitoring, Global Positioning System: Theory and Applications vol. II, Denver, 1996, pp.143-164
• 6. A. Nowak: Nowa metoda oceny dokładności wyznaczeń GNSS na potrzeby monitoringu pojazdow, LOGISTYKA 3 (2014) 4706-4717
• 7. R.G. Brown, P.W. McBurney: Self-Contained GPS Integrity Check Using Maximum Solution Separation as the Test Statistic, Proceedings of the International Technical Meeting of The Institute of Navigation (1987) 263-268
• 8. M.A. Sturza: Fault Detection and Isolation (FDI) Techniques for Guidance and Control Systems, AGARDOGRAPH 314 (1991), AGARD, NATO
• 9. A. Nowak: Influence of Pseudorange Measurement Errors and Space Segment Geometry on GPS Fixes Distribution, Advances in Computer Science-Network Centric Warfare, Gdynia, 2009, pp.148-154
• 10. A. Nowak: Protection Level of “Snapshot” RAIM Methods in Poor Geometry of Satellites, Advances in Computer Science-Network Centric Warfare, Gdynia, 2009, pp.156-162.
• 11. C. Specht, A. Nowak: Limitations of Satellite Positioning in Inland Shipping, Polish Journal of Environmental Studies 16, No 6B (2007) 83-86
• 12. A. Nowak, D. Szulc: Poziom Ochrony metod RAIM typu “snapshot” w warunkach niekorzystnej geometrii segmentu kosmicznego, LOGISTYKA 6 (2009)
• 13. A. Nowak: Problemy pozycjonowania satelitarnego w aglomeracjach miejskich, LOGISTYKA 3 (2011)
• 14. A. Nowak: Symulacje numeryczne wpływu przeszkod terenowych na dokładność wyznaczeń GNSS, LOGISTYKA 3 (2011)
• 15. A. Janowski, A. Nowak, M. Przyborski, J. Szulwic: Mobile indicators in GIS and GPS positioning accuracy in cities, Rough Sets and Intelligent Systems Paradigms, Lecture Notes in Computer Science 8537 (2014) 309-318
• 16. A. Nowak, C. Specht: Computer Simulator of GNSS Measurements, Annual of Navigation 12 (2008)