Models for Fail-Safe positioning components w.r.t. Faults

This deliverable will be focused on identifying and defining error models and faulty events for fail-safe positioning components focusing in particular on GNSS global hazards (satellite clock and ephemeris error, rare constellation fault and anomalous ionosphere conditions) and local ones (depending on the selected railway scenario and local environment as severe multipath, attenuation foliage, orographic obstacles and presence of buildings or train stations) to be synthetically generated and simulated at the very top level of the chain (local and global hazards) with respective occurrence probabilities.