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Beidou precise time service technology

A technology, Beidou technology, is applied in the field of hardware timing technology, which can solve the problems of insufficient time transmission equipment, synchronization, and inability to perform high-precision time and frequency.

Active Publication Date: 2014-10-29
GUANGZHOU SOUTH SATELLITE NAVIGATION INSTR +1
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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a Beidou precision time service technology, which aims to solve the problem in the prior art that due to the lack of precision of time transfer equipment, my country cannot perform high-precision time in the fields of communication, electric power, transportation, and high-speed digital network synchronization. Problems with Frequency Synchronization

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] In the embodiment of the present invention, GNSS dual-device common viewing means that two stations observe the same satellite or the same group of satellites at the same time to achieve time synchronization between the two stations. In order to be able to calibrate, the receiver A receiver (reference station) The clock difference with B receiver (mobile station), we use CDTpps to express. attached figure 1 It is the relationship diagram of N, M, △t, CDTpps.

[0037] RTD is a pseudo-range differential positioning method. According to RTD, △t is calculated, △t=tB-tA, tA=tA′+N; tB=tB′+M

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Abstract

The invention discloses a Beidou precise time service technology. According to the technology, the Beidou second-generation satellite navigation system is used for carrying out high-precision dual-machine common-view time service, thereby solving a problem of poor accuracy of time and frequency transmission in the communication field and the national defence building of our country. On the basis of utilization of the Beidou second-generation machine, GPS, and a dual-satellite four-frequency special-purpose time service receiver as well as a pseudo-range difference and a synchronous pseudo-range difference of a mobile radio station, a precise clock difference between two receives can be calculated, wherein the precision can achieve the nanosecond level; and the clock difference is used for fulfill the following tasks: (1), precise determination of deviation between the user clock and the standard time; and (2), realization of precise synchronization of the user clocks at different places.

Description

technical field [0001] The invention relates to a hardware timing technology, in particular to the precision timing technology of China's Beidou satellite navigation technology and global satellite navigation technology. Background technique [0002] Beidou, GPS (Global Navigation Satellite System), and GLONASS are global satellite navigation and positioning systems established by China, the United States and Russia respectively. Beidou satellite navigation system, especially Beidou second-generation satellite navigation system. [0003] With the development of science and technology, high-precision time and frequency transmission plays an increasingly important role in the development of the national economy. It is widely used in the fields of national economic construction and high-tech industries such as communications, electric power, transportation, and high-speed digital network synchronization. [0004] In recent years, with the development of national defense and s...

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Application Information

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IPC IPC(8): H04J3/06G04R20/02G04R20/04
Inventor 王永泉文述生王江林
Owner GUANGZHOU SOUTH SATELLITE NAVIGATION INSTR
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