The Research And Implementation Of Surveillance Data Process Technology Based On ADA-B Information

With the development of China's national economy,air traffic and transportation show an increasingly busy trend.The frequency of flights taking off and landing in airports in eastern China continues to rise.Air traffic control is facing more and more serious airspace and airport congestion.The traditional secondary surveillance radar cannot meet the needs of the rapidly developing air traffic control system.Therefore,Automatic Dependence Surveillance-Broadcast(ADS-B)based on global positioning system(GPS)is adopted to generate such demands.Based on this background,this paper studies the technology based on ads-b monitoring data processing.Research content based on ADS-B monitoring data processing technology includes: 1.ADS-B data forms the path of ADS-B system;2.Aircraft flight safety warning;3.Develop software design scheme and carry out demonstration and verification work.1.ADS-B data form ADS-B system track.Research is conducted from three aspects: ADS-B data preprocessing,ADS-B track correlation and ADS-B track tracking.First,it analyzes “the Annex10 to the Convention on international Civil Aviation” 1090 MHz extended transmission specification of oscillating ADS-B data,studies the ADS-B data structure,solves the decoding of ME field and CPR,generates information such as target position,height,speed,flight number and ICAO address code,and forms single path ads-b flight path.On this basis,ADS-B flight paths formed by different ADS-B ground stations are correlated,tracked and fused,and eventually formed into ADS-B flight paths.The ADS-B system track ensures the continuity of the surveillance information of the aircraft throughout the flight2.Aircraft flight safety warning.Flight safety warning includes: short-term conflict warning,minimum safe height warning,airspace intrusion warning,special secondary code warning.Firstly,short-term conflict warning alarm is studied,short-term conflict warning algorithm is discussed,and the interval standard of short-term conflict warning is given.When the aircraft violates the interval standard,warning prompt and relief advice are given.Then,the lowest safety height alarm is studied and the algorithm of the lowest safety height warning is introduced.According to the aircraft's flight attitude and height development trend,whether the aircraft enters the lowest safety warning zone or not is judged.When entering the warning zone,the lowest safety warning and avoidance advice are given.Thirdly,it studies the alarm of airspace invasion,describes thealgorithm of airspace invasion warning,tracks the target of aircraft,judges whether the target of aircraft implement falls into the effective intrusion warning area,and gives the alarm of invasion when entering the area or violates the invasion interval standard.Finally,special secondary code alarm is studied,discussing A7500,A7600,A7700,A2000 and repeated secondary code alarm,and giving warning disposal methods.Flight safety warning technology can effectively reduce flight conflicts and improve flight safety coefficient.3.Design the ADS-B monitoring data processing software architecture,build the demonstration and verification environment for ADS-B monitoring data processing,and describe the software implementation method and the implementation process of main links from the aspects of architecture,interface,database and function module.Functional tests were carried out on technologies such as ADS-B data preprocessing,ads-b track correlation,ADS-B track tracking and flight safety warning,and the test results were analyzed to verify the feasibility and correctness of the two technologies,so as to solve practical problems in engineering construction and achieve the expected research objectives.