The system adopts S-mode vehicle-mounted transponder installed on the vehicles in the airport scene, which can realize the vehicle’s ADS-B emission function. The vehicle-mounted transponder will actively broadcast the information such as the position, speed and call sign of the corresponding vehicle, and the airport ADS-B receiving station and multipoint positioning system can receive and analyze the signal and display the target to the airport controller and commander in real time, thus realizing the ADS-B monitoring function of the vehicles on the airport scene.

The system uses NFD100A to receive 1090MHz ADS-B signal, and decodes it into international standard Cat021 information for output. The device has a built-in GNSS receiver, which can provide UTC time and receiver positioning information. Realize air traffic control monitoring and command, scene activity target monitoring, etc.
The core of this system is that it can accurately capture and broadcast key information such as the position, speed and identification of moving vehicles in the airport scene. Through the integrated transponder, not only can the detailed scene position message be transmitted to ensure the accurate positioning of each vehicle, but also the identity type message can be sent to clearly identify the category and identity of each vehicle and the running status message, which can reflect the current operating status of the vehicle in real time and provide a stable and reliable monitoring source for ADS-B (Broadcast Automatic Correlation Monitoring System) and multi-point positioning system. In this way, the comprehensive monitoring of moving vehicles on the airport scene is realized, and the efficiency and safety of airport operation are greatly improved.
The system supports the provision of real-time graphical user interface (GUI), which shows the whole picture of the airport, including apron, taxiway and runway. Support real-time updating of scene information to ensure that monitoring personnel can grasp the ground situation in real time.

Runway incursion early warning
Using S-mode technology, combined with ADS-B and multipoint positioning system, a runway intrusion monitoring and early warning system is constructed. The system supports real-time monitoring of the position of aircraft and vehicles, realizes intrusion alarm through mathematical model and real-time calculation, and combines with workflow and standards, effectively tracks the illegal behavior of vehicles, and independently issues early warning and warning tips for the conflict between aircraft and vehicles without the intervention of controllers.

By monitoring and analyzing the activities in the airport in real time, the early warning system can detect potential runway incursion events in time, thus improving the security of the airport. Once a potential intrusion event is detected, the early warning system can give an alarm quickly, so that relevant personnel can respond quickly and take measures to avoid accidents. The early warning system can record the activity data in the airport, which can be used for post-event analysis to help the airport improve security measures and operational procedures.

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