Design of Simulator for Time Comparison and Synchronization Method Between Ground Clock and Onboard Clock

Abstract

In the multi GNSS era, South Korea has been studying its own satellite navigation system. World-wide navigation systems, such as GPS and GLONASS, are equipped with atomic clocks, while Japan’s QZSS is equipped with crystal oscillators. Considering the onboard clock of Korean proprietary satellite system, sufficient study of various clock synchronization systems between satellite and ground station should be preceded. In this paper, we introduce time standard, the features of onboard clocks and the consideration of time comparison between satellite and ground station. This paper proposes a design of a software simulator for remote synchronization method.