DGPS Positioning Using WAAS and EGNOS Corrections

Mohamed Abousalem, Sergey Lusin and Oleg Tubalin

Abstract:	With the growing demand for accurate and reliable worldwide differential GPS positioning, there has been a significant move towards the use of real-time GPS augmentation systems with wide area differential positioning capabilities. The US Wide Area Augmentation System (WAAS) and the European Geostationary Navigation Overlay system (EGNOS) are good examples of such a move. While these augmentation systems are developed to provide differential corrections and integrity data for satellite-based aviation, their signal will be available free of charge to all other non-aviation satellite positioning users in the respective coverage areas. Accordingly, non-aviation GPS users with WAAS/EGNOS-capable receivers will be able to do differential positioning across the United States and Europe with a free differential signal and achieve real-time 2-to-3 meter positioning. The Ashtech® G12™ and GG24™ receivers have been modified to track WAAS and EGNOS geostationary satellites and utilize their differential corrections in the navigation solution. This paper presents DGPS performance results using the newly modified G12 and GG24 receivers with EGNOS signals during Selective Availability.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	320 - 328
Cite this article:	Abousalem, Mohamed, Lusin, Sergey, Tubalin, Oleg, "DGPS Positioning Using WAAS and EGNOS Corrections," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 320-328.
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