Air traffic control; Automation; Control systems; Control theory; Data fusion; Fusion reactions; Hybrid sensors; Industrial research; Information fusion; Nuclear physics; Remote sensing; Sensor networks; Sensors; Signal processing; Space optics; Wireless networks; Wireless sensor networks; Air Traffic; Application-specific systems; Current state; Data-fusion systems; Filter-based; International conferences; Kalman filtering; Mean square estimator; Multi-sensor data fusion; Spatially distributed sensors; Transferable belief model; Sensor data fusion