Research Of Land-based And Space-based ADS-B System Data Quaility

Automatic Dependent Surveillance-Broadcast,ADS-B,is a new kind of navigation technology braught up in 1990 s.After nearly 30 years' promotion and development,ADS-B has become one of the most important mainstream surveillace technology after radar surveillance system.ADS-B can help pilots maintain aircraft's safety interval between each other and help air traffic department surveil the operation of aircrafts.However,ADS-B data will be affected by factors such as transmission loss,chanel interruption and terrain occlution in practical application.The data quality of ADS-B has been studied by scholars at home and abroad.At present,the research of ADS-B data quality is focused on which factors will affect ADS-B data quality,evaluating the quality of ADS-B data and designing algorithm to improve the speed of processing massive ADS-B data.The research of data quality of land-based ADS-B and space-based ADS-B which has become a hot spot in recent years is focused on by the paper.On the one hand,according to the requirement of ADS-B required surveillance performance and combining the actual situation of ADS-B data,the quality analysis of land-based ADS-B and space-based ADS-B data is carried out from four aspects of receiving capacity,updating time interval,accuracy and continuity.Then,by combining the two,the quality of land-based and space-based ADS-B data is compared and analyzed.On the other hand,a set of comprehensive evaluation index system for data quality is established for ADS-B,and an efficient and feasible method for comprehensive evaluation of ADS-B data quality is proposed in this paper.Analyzing the data quality of land-based and space-based ADS-B system will improve and promote the research progress of ADS-B surveilling technology in China,and let land-based ADS-B technology better serve the air surveillance field,and provide theoretical basis for the propulsion of space-based ADS-B technology in China.