Research on GNSS integrity monitoring for multilateration system

This paper introduces positioning principle of multilateration (MLAT) system. And discusses the importance of timing synchronization in this system. To avoid the occurrence of safety accidents in airports. Monitoring the integrity of GNSS is important, which can warn controller the risk of target false that may occur in the MLAT system in advance. Allowing air traffic controllers sufficient time to switch surveillance sources to the one which do not rely on GNSS. A module used to detect the risk of GNSS failed in MLAT system is designed to help MLAT system found timing risks in early time.