Design And Implementation Of Mode-S Multiradar Data Processing System

With the development of civil aviation,air traffic control performance of the intensive and reliable requirements are getting higher and higher,the data fusion of Mode-S multiradar is the core component of improving surveillance performance.This system deals with the design and implementation of multiradar data processing and display.The system can provide the Mode-S multiradar tracks fusion,which the ATC surveillance’s coverage can be expanded,the precision and reliability can be improved.The system also evaluated radar data integrity,accuracy and link isolation by ASTERIX CAT048 and CAT034 data frame.The format of Mode-S radar datais analyzed,coordinate transformation,time calibration and error analysis which is the key problem of multiradar data processing.From civil aviation standpoint,data fusion model is constructed,which composed of four sections such as plot clustering,plot-track correlation,track-track association and track filtering.Onthe basis of summarizing previous achievements,the K-Means clustering algorithm is adopted by point clustering.In plot-track correlation part,the mathematical expression of the elliptical gate has derived,based on the analysis of traditional nearest neighbor data association method,considering the application scope of civil aviation special,it proposed ATC plot-track association algorithm.This algorithm incorporates additional attributes of plot and tracks into associated programs,greatly reducing the traditional nearest neighbor data association algorithm.The least square filter,??-filter and Kalman filter are simulated,their advantages and disadvantages are compared.The Kalman filter is used to filter the tracks.In the track-track correlation algorithm,the advantages and disadvantages of mosaic algorithm,simple fusion,weight covariance and adaptive fusion are compared,the adaptive fusion method is used to track / track correlation.On this basis,Mode-S multiradar data processing system is designed and implemented.Thesoftware is divided into two parts: background and human-computer interaction.Distributed radar tracks fusion can display to the air traffic controllers by the graphical interface.All the radar channel data is preserved to provide playback function.