Development of Local Area Augmentation System Requirements

Ray Swider, Dean Miller, Arek Shakarian, Sean Flannigan, James P. Fernow

Abstract:	It is expected that properly augmented satellite-based navigation systems will be able to perform the landing system function currendy implemented in the Instrument Landing System (ILS). The FAA and industry are now engaged in the research and development of local area differential technologies to augment the existing satellite constellations. The development concept and process for determining the requirements for a GNSS Landing System (GLS) are presented herein. The requirements cover the major system parameters of accuracy, integrity, continuity of function, and availability. The requirements cover Category I through IIIb weather minimums. The FAA has recently released the Local Area Augmentation System &AA% Operational Requirements Document (ORD) which contains preliminary 0perationaI requirements. This paper presents the development and rationale of “ILS- Lookalike” requirements for transport aircraft that will minimize the impact on the other components of the landing system. The requirements analyses for the other classes of aircraft which will use the system have not been completed yet. High lidelity airplane certification simulations were used to derive the accuracy requirements. F’reliminary unvalidated requirements are presented along with the major unresolved GLS requirements issues.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	35 - 49
Cite this article:	Swider, Ray, Miller, Dean, Shakarian, Arek, Flannigan, Sean, Fernow, James P., "Development of Local Area Augmentation System Requirements," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 35-49.
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