The “Airspace Monitoring System” (AIMS) is a system for monitoring and analyzing flight data streams with respect to the occurrence of arbitrary complex events. It is a general system that allows for a comprehensive analysis of aircraft movements, in contrast to already existing tools which focus on a single task like flight delay detection. For instance, the system is able to detect critical deviations from the current flight plan, abnormal approach parameters of landing flights as well as areas with an increased risk of collisions. To this end, tracks are extracted from cluttered radar data and SQL views are employed for a timely processing of these tracks. Additionally, the data is stored for later analysis.