Abstract
GNSS (Global Navigation Satellite Systems)-based navigation is not sufficient to support air navigation in specific applications; so it is necessary to introduce Augmentation Systems. Since 1993, the civil aviation community through RTCA (Radio Technical Commission for Aeronautics) and the ICAO (International Civil Air Navigation Organization) have been working on the definition of GNSS augmentation systems that will provide improved levels of accuracy and integrity. These augmentation systems have been classified into three distinct groups: Aircraft Based Augmentation Systems (ABAS), Space Based Augmentation Systems (SBAS) and Ground Based Augmentation Systems (GBAS). The first category is based on integration of airplane sensors. The purpose of this work is to investigate the performance of an ABAS based on the integration of GPS and Barometer sensor in terms of position accuracy and system integrity, key Required Navigation Parameters (RNP) of an air navigation system.
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