High-precision RDSS time service method

Abstract

The invention discloses a high-precision RDSS time service method, and according to the method, the calculation method of RDSS time service uplink time delay is improved, the method is simple and effective, and the time service precision can be greatly improved. The same method can also be used for reckoning the satellite position corresponding to the satellite forwarding moment, or reckoning thedownlink time delay. Through test analysis and verification, by adopting the time service method provided by the invention, the time service precision can be improved to about 10ns from 50ns of a traditional RDSS time service receiver, the bottleneck of the RDSS time service precision is overcome, breakthrough progress is made, and the method has great application potential and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of RDSS timing, and in particular relates to a high-precision RDSS timing method. Background technique [0002] RDSS (Radio Determination Satellite Service) has provided positioning and timing services for more than 10 years, and is widely used in the fields of communication, electric power, commerce, and national defense construction. Its timing service accuracy is 50ns. [0003] The working principle of RDSS timing is as follows: Different from the design of satellite navigation systems such as GPS based on the time reference of spaceborne atomic clocks, the RDSS time reference uses a ground-based high-precision atomic clock, which has higher time reference accuracy. In addition, the RDSS constellation uses GEO satellites to serve China and surrounding areas. The transmission path of the RDSS timing signal is forwarded from the ground center station to the ground user through the satellite (where, f 1 ...

AI Technical Summary

Problems solved by technology

[0004] At present, the RDSS timing receiver calculates the uplink delay at the current time by using the time delay from the center station to the satellite broadcast at the current hour and the previous hour, and at the same time uses the satellite position and speed broadcast at the hour to calculate the satellite position at the forwarding time , and then calculate the downlink time delay; on this basis, error corrections such as atmospheric time delay, hardware zero value, and earth rotation correction are performed, and the timing accuracy is about 50 ns. also more and more obvious

Images