Simulated Landing Performance for GLS and ILS Systems

Tim Murphy, Len Anderson and Nancy Hien Tang

Abstract:	This paper presents the application of a signal model for GNSS Ground Based Augmentation System (GBAS) to the simulated landing performance of several aircraft. This landing performance evaluation using the GBAS model is a step in the development and validation of satellite based landing systems. Standards groups such as the International Civil Aviation Organization (ICAO), Radio Technical Commission for Aeronautics (RTCA) and the European Organization for Civil Aviation Equipment (EUROCAE) are maturing and harmonizing standards for ground based augmentation (GBAS) of the Global Navigation Satellite System (GNSS) for aviation use including precision approach operations. Within the US National Air Space (NAS), the GPS/LAAS system (Global Positioning System augmented with a local area augmentation system) will provide this service. The development of the infrastructure within the aviation community to widely field systems compliant with the standards is well underway. Certification and approvals for use of GNSS/GBAS equipment on aircraft is one area being addressed. Historically, models of navigation system errors (NSE) based on the requirements for the NAVAID have been used in the aircraft certification process in the context of Monte Carlo simulation trials. In addition to NSE, the simulations exercise the range of conditions an aircraft may see during service, including the variation of atmospheric effects (wind speed and direction, turbulence level, etc.) and aircraft configuration (weight, center of gravity location, flap settings, etc.). Samples of aircraft landing performance from Monte Carlo simulations are presented in this paper to compare the expected performance of autoland using GLS and ILS.
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:	1224 - 1233
Cite this article:	Murphy, Tim, Anderson, Len, Tang, Nancy Hien, "Simulated Landing Performance for GLS and ILS Systems," 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. 1224-1233.
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