应用网络时间协议的卫星综合测试时间同步系统

Time Synchronization System of Satellite Integration Test Using NTP

针对广域网环境下卫星综合测试系统存在的测试设备之间时间不同步问题,提出应用网络时间协议(NTP)构建卫星综合测试时间同步系统。该系统以NTP作为时间同步协议,以GPS或"北斗"导航设备终端作为高精度时间源,以用户数据包协议(UDP)组播形式实现同网段内各测试设备之间的时间同步,以uDP客户机/服务器形式实现跨网段测试设备之间的时间同步。文章提出的时间同步系统,可解决广域网卫星综合测试系统时间不同步问题,也能满足综合测试系统对时间精度的要求。

In order to resolve the time unsynchronization problem existing in satellite integration test system under WAN （wide area net） environment, the paper puts forward a time synchronization system of satellite integration test based on NTP. This system uses NTP as time synchronization standard, and uses a GPS or Beidou navigation equipment as high precision time source. Time of test equipments in one net segment is synchronized by UDP group broadcast, and time of test equipments in different net segments is synchronized by UDP client/server. The system proposed can not only solve the problem of the time unsynchronization problem existing in satellite integration test system under WAN environment, but also satisfy the time precision requirement of satellite integration test system.