System Architecture-based Design Methodology for Monitoring the Ground-based Augmentation System: Category I - Integrity Risk

This paper has described a method to accomplish the Ground-Based Augmentation System signal-in-space integrity risk monitoring for a ground station specified by ICAO, Annex 10, Vol.1 and RTCA DO-245-A, wich is a mandatory requirement to meet the certification aspects for a Ground-Based Augmentation System station. The proposed methodology was based on the Risk Tree Analysis technique, which is an optional way to design and develop an engineering solution named as integrity risk monitor that assures the integrity risk requirement for standard system architecture. The achieved results concern the qualitative and quantitative aspects of solution, which are met throught the system architecture and the system safety assessment process, in special by risk assessment concepts. Finally, the integrity risk monitor is an optional architectural solution (a practical way) that has demonstrated a satisfactory result to meet the certification basis of the Brazilian Aeronautical Authorities.