Analysis of GNSS time scales

In all GNSS satellite time scales are referenced to GNSS Time and GNSS Time is synchronized to Reference Time which is steered to UTC. GNSS Time accuracy parameters influence the accuracy of positioning and timing as well as the accuracy of calculating and predicting GNSS-GNSS Time Offsets for GNSS interoperability. GNSS time scales generation and maintenance have been analyzed and the results of their accuracy estimation are provided on the basis of available information.