Implementation of a High-Precision Time-Synchronization System Based on the LinuxPPS

In order to precisely calibrate the time settings of astronomical facilities in the Antarctica, we introduce a method of building a high-precision NTP server, which can collect valid timestamps from the NMEA0183 data and keep them to be of high precision using PPS signals. The paper gives the circuit schedules of using the G591 GPS module and also the building steps of the NTP server in details. Three comparative tests show that the NTP server based on the LinrxPPS is precise, stable, and reliable.