Design And Implementation Of A Highly Reliable Air Traffic Control Radar Data Recording And Playback System

Air traffic control(ATC) system is responsible for flight management and security work. It's a necessary condition to achieve radar-control. When ATC system is working, the real-time radar data and voice information should be recorded. And them can be replayed. These can help us to find the reason when accident investigation, and also providing condition to the simulation control training.In this study, DRP is a radar data record and playback subsystem of ATC, and with dual-server and dual-network. DRP system can record single-radar and multi-radar data incessantly. When received playback command,it would send radar data to control terminal (SDD) according to the command. DRP system also has dual machine data synchronization and master-standby switching functions. The following 4 function points and technical innovations is emphases of this paper.1. Radar data recording. Using a index structure like dictionary, easy to search and replay the suited data quickly.2. Radar data playback. The head of each data frame has the reception time interval with the previous frame. The time interval would as clock cycle when replay data. It help to reappearance the real air-status.3. Dual machine data synchronization. To achieve make up the lossing data of two DRPs, rather than simply mirror copy;4 Master-standby switching. This function ensure there is only one DRP is master-working at any time. This DRP can respond playback command. The standy one only record data and does not respond playback command.These functions have been proved achieve the request of ATC system design by testing, and have been running normally for 3 years.