Precise timing system and method and timing service system

A service system and system time technology, which is applied in the field of timing service systems, can solve the problems of limited common-view timing, unsuitable size and power consumption, and low timing accuracy of atomic clocks for popular applications, and achieves high timing speed and time synchronization accuracy. High, weakening the effect of time synchronization errors

Pending Publication Date: 2018-09-14
QIANXUN SPATIAL INTELLIGENCE INC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0013] The problem solved by the invention is that the timing accuracy of the atomic clock is low, the size and power consumption are large, it is not suitable for popular applications, and the common-view timing is limited by the length of the baseline.

Method used

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  • Precise timing system and method and timing service system
  • Precise timing system and method and timing service system

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Embodiment Construction

[0031] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0032] see figure 1 , the principle adopted by the precision timing method of the present invention is described as follows. In China, the national standard time is selected as the reference time (UTC or NTSC). Of course, those skilled in the art should know that in other countries or regions, the locally recognized standard time can be selected as the reference time. The present invention will be described below by taking the reference time being the national standard time in China as an example.

[0033] Assume that there are m master control stations, and each master station is synchronized with the standard time center (China National Time Service Center Punctuality Laboratory) through satellite two-way time and frequency transmission...

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Abstract

The invention discloses a precise timing system and method and a timing service system. The precise timing system comprises a satellite-based enhancement system, the timing service system and a user terminal. The satellite-based enhancement system sends wide area enhancement information to the timing service system. The timing service system receives GNSS observation data from satellites, the widearea enhancement information and reference time from a timing service center, processes the observation data and the wide area enhancement information to obtain system time of each satellite, and obtains a real-time system time difference of the system time of each satellite relative to the reference time on the basis of the system time of each satellite and the reference time. The user terminalreceives the GNSS observation data from the satellites, the real-time system time difference of the timing service system and the reference time at least, processes the GNSS observation data to obtainlocal time of a user and system time of a navigation system, obtains a difference between the user local time and the reference time according to the real-time system time difference and the difference between the user local time and the navigation system, and the user local time is corrected to the reference time according to the obtained difference between the user local time and the referencetime.

Description

technical field [0001] The invention relates to a time service system, in particular to a precise time service system and method based on a GNSS augmentation system, and also to a time service system. Background technique [0002] Global Navigation Satellite System (GNSS) is a satellite-based radio positioning, navigation and timing system, mainly including GPS, GLONASS, BDS and Galileo systems. GNSS broadcasts navigation signals through navigation satellites, which can realize precise transmission of position and time, and has a wide range of applications in many fields. In the application field of time service / time synchronization, the GNSS receiver can use the radio signals broadcast by navigation satellites to correct the local clock, so that the time of the receiver is synchronized with the GNSS system time, achieving the purpose of time service or time synchronization between different terminals. However, the timing accuracy of commonly used GNSS receivers is only 20n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R20/02
CPCG04R20/02
Inventor 熊超
Owner QIANXUN SPATIAL INTELLIGENCE INC
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