为了实现南极天文观测设备的精确校时,采用搭建高精度网络时间协议NTP(Network Time Protoc01)服务器的方法实现。基本思路是从NMEA0183数据中提取时间信息,通过PPS信号保证高精度。具体实现方法:主要采用GPS接收芯片G591构造硬件电路,软件部分需要LinuxPPS(Linux Pulse Per Second)和NTP服务器软件的正确安装和配置。对照实验表明基于LinuxPPS的NTP服务器是精确、稳定而可靠的。
In order to precisely calibrate the time introduce a method of building a high-precision NTP settings of astronomical facilities in the Antarctica, we 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.