Evaluation of the European Geostationary Navigation Overlay System using the Satellite Navigation Avionics Package

Thomas W. Sanders, Steven J. Leighton, David Harriman, Todd Lardy and Mike Pleva

Abstract:	Within the International Civil Aviation Organisation (ICAO) member states, the development of the Global Navigation Satellite System (GNSS) is being standardised to support global navigation requirements. The United Kingdom’s National Air Traffic Services (NATS) is tasked to support the UK's implementation of GNSS; specifically the development of augmentation services for the Global Positioning System (GPS). ICAO is standardising on two different types of GNSS augmentations – Ground Based Augmentation Systems (GBAS) and Space Based Augmentation Systems (SBAS). Within the United States, the Federal Aviation Administration (FAA) is pursuing development of SBAS and GBAS systems known as the Wide Area Augmentation System (WAAS) and Local Area Augmentation System (LAAS), respectively. Similarly, the European community is developing an augmentation system similar to the US WAAS known as the European Geostationary Navigation Overlay System (EGNOS). NATS and the US Naval Air Warfare Center-Aircraft Division (NAWCAD) are co-operatively evaluating GNSS augmentations and promoting their interoperability. To facilitate this evaluation, a series of General Aviation flight demonstrations were performed throughout the UK during the summer of 2000. The demonstrations were accomplished using the Satellite Navigation Avionics Package (SNAP), consisting of the WAAS Verification Receiver, a WAAS Gamma control head and a PC-104 interface device. SNAP was previously used to assist in evaluation of the WAAS SIS. The SNAP was developed by NAWCAD for evaluating the WAAS and was used in this effort to show interoperability of international SBAS signals. NATS have installed SNAP into a civil GA aircraft and have flown a variety of profiles to demonstrate the utility of European Geostationary Navigation Overlay System (EGNOS) to the UK general aviation community. Both parties have gained valuable experience ensuring compatibility between U.S. and European Satellite Based Augmentation Systems.
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:	766 - 772
Cite this article:	Sanders, Thomas W., Leighton, Steven J., Harriman, David, Lardy, Todd, Pleva, Mike, "Evaluation of the European Geostationary Navigation Overlay System using the Satellite Navigation Avionics Package," 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. 766-772.
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