An IMMKF Implementation in the PHOENIX Multi-Radar Tracker System for the Portuguese Airspace

The PHOENIX radar data processing system of the German air navigation service provider “Deutsche Flugsicherung” (DFS) has been developed for the German airspace as a one model Kalman Filter tracker (1MKF), which was efficient for a multiradar coverage situation as in Germany. Since the Portuguese airspace is mainly over sea, large areas of monoradar coverage exist. An interactive multiple model Kalman Filter implementation (IMMKF) in PHOENIX proved to be suitable in these circumstances. The problems with the 1MKF, and the improvement by the IMMKF are shown as well as the evaluation results with the tracker evaluation tool SASS-C, and finally a comparison is made with the widely used Eurocontrol tracking system ARTAS.