Beidou wide area timing system and method

Abstract

The invention discloses a Beidou wide area timing system and method. The Beidou wide area timing method comprises the following steps: obtaining a phase observation value and a pseudo-range observation value of a China Beidou satellite navigation system of each ground Beidou tracking station network, time difference monitoring data of the time of the China Beidou satellite navigation system and the Beijing time of a laboratory atomic clock group, a satellite ephemeris of the China Beidou satellite navigation system, earth rotation and antenna phase center parameters; performing preprocessing of data check, gross error elimination and cycle slip detection on the obtained data; performing error model correction and fine data processing on the preprocessed data; encoding the corrected data togenerate a telegraph text, and uploading the telegraph text to a communication satellite for broadcasting; and performing, by a user, non-difference precise timing solution and time difference parameter correction on the received corrected data and the local observation data to obtain a user local time consistent with the standard time. By adoption of the Beidou wide area timing system and methoddisclosed by the invention, single-station wide area timing service can be achieved, the timing precision is high, the operability is high and the action range is limited.

Description

technical field [0001] The invention relates to the technical field of Beidou satellite timing, in particular to a Beidou wide-area timing system and method. Background technique [0002] Accurate timing plays an important role in national defense and military activities such as rocket launch, precise missile control, and satellite formation flight. High-precision time-frequency measurement based on an all-weather, global satellite navigation system is a new technology that has been widely studied and used. The United States has made important progress in GPS satellite timing, and occupies an important weight in participating in international time comparisons. China's BDS (BeiDou Navigation Satellite System, Beidou Satellite Navigation System) timing is catching up with the construction and improvement of the basic system. . [0003] The current BDS (Beidou Satellite Navigation System) one-way timing accuracy is on the order of 20-100ns, and the two-way timing accuracy is ...

AI Technical Summary

Problems solved by technology

[0003] The current BDS (Beidou Satellite Navigation System) one-way timing accuracy is on the order of 20-100ns, and the two-way timing accuracy is on the order of 10-20ns, and requires special timing terminal equipment support; its common-view time transfer and full-view time transfer can reach 3 -5ns precision, but it can only provide point-to-point time service, which cannot meet the requirements of unlimited number of users in time service, cannot realize single-station wide-area time service, user operability is poor, and the scope of action is limited; and there are only low-precision pseudo-ranges Observation Limitations

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