Abstract: A computer implemented data distribution method for radar data. The method first receives distribution groups. Each distribution group corresponds to a data storage terminal and includes source code corresponding to data collection terminals. Next, the method calculates distances between the data storage terminals and the data collection terminals and selects the source code in the distribution groups with a shortest distance. In the previous comparison, if the priority levels of the source code are the same, distances between the data storage terminals and the data collection terminal corresponding to the repeated source code are calculated. The source code is selected for a distribution group which has the shortest distance. The steps are repeated until the source code is all selected.

Abstract: A track position prediction method used in combined radar and ADS surveillance environment is disclosed. Since the time interval between two successive ADS-A reports is too long, air traffic control system must be able to predict aircraft position within this time interval to increase safety. The present invention provides a way to satisfy this requirement.

Abstract: A target/track assignment method for a combined radar/ADS surveillance environment uses tandem cycles to help the air traffic control system update the order of system tracks, thereby permitting numerous target reports to be processed in real time.

Abstract: A tracking data fusion method used in a combined radar/ADS surveillance environment defines track states, track types, and track types transition rules to track aircraft. The best available flight services could be provided if the proposed method is used in an air traffic control system.