An improved high-precision rdss timing method

A time and delay technology, applied to radio-controlled timers, instruments, etc., to achieve great application potential and economic benefits, overcome the bottleneck of time service accuracy, and improve the accuracy of time service

Active Publication Date: 2017-07-07
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The traditional RDSS timing receiver uses the satellite speed to estimate the satellite position, and then calculates the downlink delay and corrects the uplink delay; on this basis, it performs error corrections such as atmospheric delay, hardware zero value, and earth rotation correction, and the timing accuracy is about 50ns. With the improvement of users' requirements for accuracy, the disadvantages of the existing timing accuracy become more and more obvious

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  • An improved high-precision rdss timing method
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  • An improved high-precision rdss timing method

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Embodiment Construction

[0042] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0043] In the past 10 years, although the traditional RDSS time service user machine has met the system index requirements, there has been no breakthrough development. The laboratory has been committed to the research and development of RDSS positioning and timing technology for many years. After several analyzes, researches, evaluations, and demonstrations in the past two years, it has finally achieved breakthroughs in RDSS timing technology over the past 10 years: First, the research found that GEO satellite motion produces The Doppler frequency shift has a great impact on RDSS timing, which has not been considered in traditional receivers; second, the use of satellite speed to estimate satellite position will also bring a large error, and a new method needs to be proposed Improvement strategy; if these two aspects can be improved, the accuracy of RDSS t...

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Abstract

The invention discloses an improved high precision RDSS time service method. On one hand, the method herein overcomes the calculation method of traditional RDSS time service receiver which utilizes the position and velocity of satellites at integral and fractional points in calculating satellite position by adopting an improved method in calculating satellite position; on the other hand, the method herein increases Doppler frequency shift in correcting impact on the RDSS time service so as to substantially increase the precision of time service; the improved method herein, through our test analysis and research demonstration, can increase the time service precision of traditional time service receiver from 50 ns to better than 10 ns, and overcomes the precision bottleneck of the RDSS time service. Therefore, the method herein achieves a breakthrough development and has great application potential and economic benefits.

Description

technical field [0001] The invention relates to RDSS timing technology, in particular to an improved 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 and f 3 is th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/04
Inventor 曲江华袁洪欧阳光洲李子申唐阳阳李文
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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