SBAS-based navigation system for precision approach in CAT II LVC

Abstract Due to lack of advanced navigation systems, secondary airports are normally unable support instrument approaches in low visibility conditions (LVC) more adverse than Category (CAT) I, making them inaccessible during such conditions. Incoming flights then delayed, diverted adjacent airports, or cancelled before take-off. This paper presents an onboard solution, under development scope SESAR 2020 Solution PJ02-W2- 17.2, which focuses on technology mitigate these traffic disruptions by enabling CAT II LVC with minimum airport and air service provider investments. The concept builds upon global satellite systems (Global Positioning System L1 frequency – GPS L1, satellite-based augmentation system), currently enables Localizer Performance Vertical guidance (LPV) operation down LPV 200 minima. designed system includes radio altimeter-based aiding innovative integrity algorithm improve performance operations below 200ft / 100 As no requirements have yet been officially published, authors also defined sets candidates based Instrument Landing Collision Risk Model other sources. team developed verified a Monte-Carlo fast-time simulation toolset enable representative statistically significant evaluation the feasibility via its availability throughout Europe, as well sensitivity proposed alert limits. Also, flight data collection software prototype allow for further validations. Simulations demonstrated over 95% average best results achieving level 99% depending used set requirements. solution allows unlocking various benefits business/airline operators (e.g., avoided extra costs, increased predictability), passengers (avoided opportunity loss) (retained profit from flights, less at diversion airports). Technology marks important step towards gate-to-gate autonomous operations.