Aiming at the contradictory between measurement range and resolution in the traditional time synchronization technology

a high-resolution time synchronization detection method with wide range is proposed on the basis of time interval measurement.Using the accuracy and stability of electromagnetic wave signal transmission in a specific medium

combining the different frequency phase detection principle without frequency normalization between any signals

and based on the conversion of time and space relations

a time-frequency measurement technique based on length vernier is used in navigation satellite for the synchronization detection of 1pps signal

which improves the resolution of the time difference measurement of 1pps signal.Moreover

the multi-levels measurement method formed by combining the technique and the traditional time interval measurement method with high precision has a wide measurement range in time and frequency measurement field.It was found that the method is reasonable and scientific in our experiment.Experimental results show that the measurement resolution with 50ps can be obtained in this method

and its stability is better than 10ps.The novel method may be ussful for providing the theoretical guidancethe and the key technical support of time synchronization to the chinese high-tech areas

such as aeronautics and astronautics

navigation and positioning

communication

metrologica

radar

astronomy and so on.