Security of GNSS-Based Synchronization Systems : Monitoring the quality of navigation systems

The article discusses the factors that affect the quality of the navigation field, shows the vulnerabilities of navigation receivers. Special attention is paid to deliberate dmimink attacks and spoofing. The classification of GNSS spoofing is given. The methods for ensuring the security of synchronization systems based on GNSS receivers are described, a comparative analysis of different protection methods, their disadvantages and advantages is carried out. The quality monitoring of navigation systems is considered in detail as a means of protecting critical infrastructure and effective protection against jamming and spoofing of GNNS signals. The criteria for assessing the quality of the navigation signal for determining anomalies and substitution of the GNSS signal are given. The possibility of a monitoring system for finding the optimal location of the GNSS antenna is described.