With the development of science and technology, high precision time has been applied in various fields, especially in national defense and other advanced science and technology fields. Time synchronization requires accuracy of nanosecond or higher.
As is known to all, for the national defense scientific research experiments, clock synchronization is particularly important, such as the rocket's accurate launch time relates to the success or failure of the whole experiment, but this time the accuracy of the flag is set the clock synchronization system, not just launch time, the clock synchronization system and national defense scientific research experiments of many important events,
Emission, such as the rockets before launch the ignition time after shutdown time, multi-stage rocket interstage separation time, the separation of the rockets and spacecraft, spacecraft orbit, the spacecraft recovery braking rocket ignition time, the conventional weapons test of the time of the muzzle and away from the beam and so on all need to provide an accurate time clock synchronization system.
