Multi-station differential post-processing high-precision time synchronization method and multi-station differential post-processing high-precision time synchronization system

Abstract

The invention relates to a multi-station differential post-processing high-precision time synchronization method and a multi-station differential post-processing high-precision time synchronization system. The multi-station differential post-processing high-precision time synchronization system comprises satellite navigation receivers. Each satellite navigation receiver is mounted on a corresponding aircraft, satellite navigation signals can be received by the satellite navigation receivers, PPS (pulse per second) signals can be generated at generation moments T<A0> and T<B0>, baseband original observation information of the satellite navigation receivers and the generation moments T<A0> and T<B0> can be transmitted to data transmission systems, received baseband original observation information can be transmitted to a ground receiver system by the data transmission systems, and the aircrafts do not need to be communicated with one another; original observation information of the satellite navigation receivers on the multiple aircrafts can be simultaneously received by the ground receiver system and can be transmitted to a data processing system, resolving can be simultaneously carried out on the original observation information of the multiple satellite navigation receivers by the data processing system to obtain common-view satellites, PPS trigger time marks of each receivercan be corrected by means of relative differential calculation, and accordingly the time of multiple stations can be highly synchronized. The multi-station differential post-processing high-precisiontime synchronization method and the multi-station differential post-processing high-precision time synchronization system can be applied to the field of satellite navigation high-precision time service.

Description

technical field [0001] The invention relates to the field of high-precision time service of satellite navigation, in particular to a multi-station differential post-processing high-precision time synchronization method and system. Background technique [0002] Satellite navigation technology is very common in aircraft, providing real-time position and time. Since the satellite receivers have their own clock sources, although they all receive the spread spectrum information of the navigation satellites to obtain the synchronized time and keep synchronized with the Universal Time Coordinated (UTC), they are affected by the jitter of the satellite's own clock source, the interference of the space ionosphere error, and the satellite Influenced by various factors such as the drift of the navigation receiver's own crystal oscillator, the PPS accuracy triggered by the general receiver is on the order of ±30ns relative to the UTC time, and the time accuracy between two satellite rec...

AI Technical Summary

Problems solved by technology

However, the premise of the implementation of this technology is that the satellite navigation receivers in the two places are static, and the antenna position of the satellite receiver is accurately measured in advance. The common-view synchronization process takes 10 to 30 minutes, and it cannot be directly used on aircraft occasions.

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