The major systems related to the mission of launching in space center require accurate time information to perform functions at a given time and process and analyze interlocked data between equipment. In order to provide such time information, the Nar...
The major systems related to the mission of launching in space center require accurate time information to perform functions at a given time and process and analyze interlocked data between equipment. In order to provide such time information, the Naro Space Center has established and operated a TSDN(Time Synchronization and Display Network). The standard time signal generator, which is a main element of TSDN, performs the function of generating and distributing accurate time information by receiving GPS (Global Positioning System) signals. It has a vulnerability that may generate incorrect time information due to the time information rollover phenomenon of GPS signals or GPS interference. In this paper, we search trends in the issues and describe countermeasures.