High-precision timing system and method with navigation satellite adopted

Abstract

The invention relates to a high-precision timing system and method with a navigation satellite adopted. The method includes the steps that firstly, whether the timing system is successfully positioned or not is confirmed; secondly, whether a PPS signal provided by a satellite signal receiving module is continuously effective or not is judged; thirdly, timing is carried out through the satellite PPS signal; fourthly, punctuality is carried out through a local clock signal. According to the high-precision timing system and method with the navigation satellite adopted, a constant-temperature crystal oscillator is disciplined through the PPS signal provided by the navigation satellite, and control parameter changes are recorded in the disciplining process; under the punctuality state, the frequency of the local clock signal is compensated for and adjusted according to changing conditions of the control parameters under the timing state. After the timing system loses a navigation satellite reference signal, synchronization between the timing system and the satellite can still be kept according to a PPS reference signal obtained through local clock signal frequency demultiplication, the punctuality ability of the system is greatly improved, and long-time punctuality work can be more precisely completed.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a high-precision timing system and method using navigation satellites. Background technique [0002] Military systems, financial systems, telecommunication systems, and power systems all need to synchronize time and frequency during operation. The development of time and frequency standards is of great significance to the country's economy, science and technology, society, and national defense security. At present, the timing synchronization approach of the time-frequency standard is developing from short-wave, long-wave, television and other technical means to navigation satellites. The main principle of using navigation satellites for timing synchronization is to receive satellite signals through the navigation satellite signal receiving module, and realize system timing and network clock synchronization according to the 1PPS (pulse per second) signal in the received navigat...

AI Technical Summary

Problems solved by technology

At this stage, there are many technologies using navigation satellite timing, but the timing accuracy needs to be further improved, especially when the satellite signal is lost, the system's timing capability is poor, and it cannot meet the higher synchronous timing accuracy requirements

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