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Improvement of Single-Frequency GPS Positioning Performance Based on EGNOS Corrections in Algeria

Published online by Cambridge University Press:  17 January 2020

Lahouaria Tabti*
Affiliation:
(Tlemcen Telecommunications Laboratory, Faculty of Technology, Aboubekr Belkaid University of Tlemcen, Chetouan, Algeria) (Department of Space Geodesy, Centre of Space Techniques, Algerian Space Agency, Arzew, Algeria)
Salem Kahlouche
Affiliation:
(Department of Space Geodesy, Centre of Space Techniques, Algerian Space Agency, Arzew, Algeria)
Belkacem Benadda
Affiliation:
(Tlemcen Telecommunications Laboratory, Faculty of Technology, Aboubekr Belkaid University of Tlemcen, Chetouan, Algeria)
Bilal Beldjilali
Affiliation:
(Department of Space Geodesy, Centre of Space Techniques, Algerian Space Agency, Arzew, Algeria)
*

Abstract

The main objective of the European Geostationary Navigation Overlay System (EGNOS) is to improve the positioning accuracy by correcting several error sources affecting the Global Positioning System (GPS) and to provide integrity information to GPS signals for users in real time. This research presents analysis used to investigate improvement in the performance of single-frequency GPS positioning using EGNOS corrections in Algeria. In this study, we performed position measurements with two calculation approaches, the first based on GPS single-point positioning and the second using EGNOS differential corrections. Positioning accuracy was determined by comparison with the known precise coordinates of the sites; and then the improved ionospheric correction using EGNOS was investigated. The results revealed that GPS + EGNOS performance was significantly improved compared with GPS alone, when measurements of horizontal and vertical accuracy were taken into account, and that the EGNOS corrections improved east and north components slightly, and the up component significantly.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 2020

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