A Comparison of Navigation by Basic GPS Lateral Guidance to Navigation by GPS/WAAS for Various Aircraft Final Approach Categories

David P. Stapleton

Abstract:	A survey of the performance of various hand-flown, instrument-guided aircraft during the final approach phase of test flights is presented. The cases of category A, B and C airplane approaches and helicopter approaches are included. Statistics are presented within each case for aircraft that used basic GPS (i.e. GPS only) lateral guidance with either GPS or barometric vertical guidance and for aircraft that used the GPS Wide Area Augmentation System (GPS/WAAS). Calculations are made separately for Navigation System Error (NSE), Flight Technical Error (FTE) and Total System Error (TSE). Helicopter statistics are presented for different GlidePath Angles (GPAs). Additional comparisons are made in terms of spectral analysis of error frequency components, calculation of correlation between error components, and testing the goodness-of-fit of error components to Gaussian probability densities.
Published in:	Proceedings of the 2005 National Technical Meeting of The Institute of Navigation January 24 - 26, 2005 The Catamaran Resort Hotel San Diego, CA
Pages:	629 - 642
Cite this article:	Stapleton, David P., "A Comparison of Navigation by Basic GPS Lateral Guidance to Navigation by GPS/WAAS for Various Aircraft Final Approach Categories," Proceedings of the 2005 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2005, pp. 629-642.
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