GNSS Autonomous Integrity Monitoring with Barometric Pressure Measurements and Weather Data

Vertical navigation is essential for new aviation operations like precision approaches and automatic landing which are expected to be primarily based on Global Navigation Satellite Systems (GNSS). However, achieving tighter vertical requirements with GNSS challenging due the inherent geometrical limitations. Current Aircraft-Based Augmentation (ABAS) developments focus proving that Advanced Receiver Autonomous Integrity Monitoring (ARAIM) able provide a robust operation horizontal services guidance via use of Multi-frequency Multi-constellation GNSS. Although ARAIM can achieve high levels integrity, availability continuity system may compromised by loss satellites or presence cycle slips. For this reason, support onboard sensors barometers guarantee all extend achievable accuracy integrity future even more stringent operations. This paper aims at augmenting geodetic altitude obtained from aircraft barometric pressure measurements external weather data within architecture ARAIM. The present work describes derivations threat error models required inclusion into improvement in simulated world-wide respect uncertainty altitude. Then, real flight used show benefit barometer augmentation solution under operational scenarios. several hours collected during tests campaign performed 2018 German Aerospace Center’s (DLR) Dassault Falcon aircraft.