Study On The Influence Of Ephemeris And Clock Information On GLONASS Standard Positioning Service

Nowadays the Global Navigation Satellite System is a core element of the social-economic development and has various applications. To be able to provide users with high-end positioning service it is necessary to ensure high accuracy and precision of GLONASS system. The article addresses the issue of ephemeris and clock information accuracy and its influence on the user position accuracy. The ephemeris and clock information is comprised of ephemeris information and frequency-time corrections. This study focuses on the analysis of each component and access the influence by solving navigation problem for different scenarios. The results showed that the accuracy of the frequency-time corrections are of the greatest importance and have a great impact on the positioning error, while the ephemeris information are insignificant.