Abstract
The German air navigation service provider “Deutsche Flugsicherung” (DFS) has been developing the PHOENIX project since October of 2001. PHOENIX is a distributed client-server-based multi-radar tracking and air situation display system, primarily for use in ATC towers and as a fallback Radar Data Processing System in Area Control Centers. The PHOENIX system is designed to handle up to 50 radar systems and up to 3,000 tracks. This text describes the selected system architecture, the tracker design decisions, and presents the observed accuracy and performance results.The multi-radar tracker is based on a 4+2 variables Kalman Filter, and uses multi-plot fusion instead of multi-track fusion. Combined with accurate projection corrections these techniques provide a precise and powerful air situation display, which has been proven to cope with about 1600 tracks of live traffic from 28 radars in an area of interest that covers the whole of Germany. For this performance the tracker utilises less than 5% of the available resources of LINUX-based PCs used for this application. Even for this volume of airspace, the positional accuracy is good enough to meet existing ATC requirements.
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