This paper introduces the distribution of GPS control net of hydro-junction, and analyzes on the precision design of GPS control net.
介绍了水利枢纽GPS平面控制网的布设，分析了GPS控制网的精度设计。
The long distance, high precision time synchronization is very important for SDH communication net, control of electric power system and satellite navigation system, etc.
远距离、高精度的时间同步对SDH通信网、电力系统调控和卫星导航系统等有着极其重要的意义。
The long distance, high precision time synchronization is very important for SDH communication net, control of electric power system and satellite navigation system, etc.
远距离、高精度的时间同步对SDH通信网、电力系统调控和卫星导航系统等有着极其重要的意义。
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