Standard time sub-nanosecond level time service method based on RTK improved technology

Abstract

The invention provides a standard time sub-nanosecond level time service method based on an RTK improved technology. A server generates a GNSS real-time track product based on GNSS observation data generated by an iGMAS and IGS tracking network, and broadcasts the GNSS real-time track product to a client through a communication network. A user side comprises a reference station and a moving station, the reference station is provided with a GNSS multimode receiver and measures a coordinate, and the reference station is externally connected with standard time UTC (K). The moving station is provided with the GNSS multimode receiver. A network link is established between the reference station and the moving station, and the reference station sends collected observation data to the moving station through the network link in real time. And the moving station differentiates the received reference station observation data with the observation data of a local station, and solves a local stationclock and a reference station clock, which is a difference of standard time, by combining the received GNSS real-time track product of the server. Real-time time service precision from a sub-nanosecond level to a nanosecond level can be obtained.

Description

technical field [0001] The invention relates to a high-precision timing method, in particular to a sub-nanosecond timing method. Background technique [0002] Determining and maintaining a certain time scale, and transmitting the time information representing this scale in a certain way for users to use, this whole set of work is called time service in China and time service in other countries. The timing service provides users with three kinds of basic information: one is the date and time of the day, which tells people when something happened; Standard frequency, which marks the rate at which certain events occur. With the development of human society and the advancement of science and technology, timing technology has made significant progress. Today, time service has been called an indispensable public welfare project in the national economy and people's livelihood, and it is even related to national security. [0003] At present, according to the different means of t...

AI Technical Summary

Problems solved by technology

Because the satellite clock model is difficult to accurately determine, high-precision real-time satellite clock error has always been a difficulty in GNSS real-time applications

Therefore, it is difficult to accurately realize high-precision timing based on PPP technology

Finally, the current GNSS timing is based on the system time maintained by each navigation system, such as GPST, etc. Compared with the standard time, its stability is lower

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