Multi SBAS Interoperability Flight Trials with A380

L. Azoulai, S. Virag, R. Leinekugel-Le-Cocq, C. Germa, B. Charlot

Abstract:	Airbus will equip its A350 XWB with a new function enabling to fly RNAV LPV approaches down to 200 ft minima. This function is called Satellite Landing System. The first technical enabler of this function is the SBAS system like WAAS, EGNOS or MSAS, all defined by ICAO SARPS and RTCA DO-229D, which provide in theory all the requirements to ensure interoperability. In an effort to contribute to enhanced interoperability between SBAS systems, assuming SBAS may provide a worldwide coverage, enabling other services than precision approach, Airbus has decided to perform flight trials with an A380 equipped with one or two modified Multi-Mode-Receivers embedded with SBAS sensor. These trials have led the A380 to use EGNOS over Europe, WAAS over North-America and MSAS over South-East Asia, analysing when possible, behaviour during transitions. This paper presents differences between existing SBAS that could be potential sources of non interoperability in order to take benefit of worldwide SBAS as soon as possible. Examples of operational cases where these cases could be experienced are described complemented by experimental results, with comparison of ground and airborne data. This paper will conclude on the performance and the interoperability between the existing SBAS, and will provide lessons learned as well as recommendations for future GNSS systems and standardization bodies.
Published in:	Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010) September 21 - 24, 2010 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	1449 - 1464
Cite this article:	Azoulai, L., Virag, S., Leinekugel-Le-Cocq, R., Germa, C., Charlot, B., "Multi SBAS Interoperability Flight Trials with A380," Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010), Portland, OR, September 2010, pp. 1449-1464.
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