Beidou wide area timing system and method

A Beidou and wide-area technology, which is applied in the field of Beidou satellite timing, can solve problems such as limited range of action, inability to meet the requirements of an unlimited number of users, and poor user operability, so as to improve accuracy and stability, improve accuracy, and improve reliability. operational effect

Active Publication Date: 2018-12-14
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
View PDF11 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current BDS (Beidou Satellite Navigation System) one-way timing accuracy is on the order of 20-100ns, and the two-way timing accuracy is on the order of 10-20ns, and requires special timing terminal equipment support; its common-view time transfer and full-view time transfer can reach 3 -5ns precision, bu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Beidou wide area timing system and method
  • Beidou wide area timing system and method
  • Beidou wide area timing system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] figure 1 It is a schematic flow chart of the Beidou wide-area timing method in Embodiment 1 of the present invention.

[0055] like figure 1 As shown, a Beidou wide-area timing method includes:

[0056] Step 101: Obtain the phase observation value and pseudorange observation value of the China Beidou satellite navigation system of each ground Beidou tracking station network;

[0057] Step 102: Obtain the time difference monitoring data between the China Beidou satellite navigation system time and Beijing time of the laboratory atomic clock group;

[0058] Step 103: Obtain the satellite ephemeris, earth rotation, and antenna phase center parameters of the China Beidou satellite navigation system;

[0059] Step 104: Perform data inspection, outlier elimination, and cycle slip detection on the phase observation value, pseudorange observation value, and time difference monitoring data to obtain preprocessed data;

[0060] Step 105: Perform error model correction and fin...

Embodiment 2

[0075] figure 2 It is a schematic structural diagram of the Beidou wide-area timing system according to Embodiment 2 of the present invention.

[0076] like figure 2 As shown, a Beidou wide-area timing system includes:

[0077] The Beidou tracking station network observation value acquisition module 201 is used to obtain the phase observation value and pseudorange observation value of the China Beidou satellite navigation system of each ground Beidou tracking station network;

[0078] The time difference monitoring data acquisition module 202 is used to obtain the time difference monitoring data between the China Beidou satellite navigation system time of the laboratory atomic clock group and Beijing time;

[0079] Satellite navigation-related parameter acquisition module 203, used to acquire satellite ephemeris, earth rotation, and antenna phase center parameters of China's Beidou satellite navigation system;

[0080] A preprocessing module 204, configured to perform dat...

Embodiment 3

[0097] image 3 It is a schematic structural diagram of the Beidou wide-area timing system according to Embodiment 3 of the present invention.

[0098] like image 3 As shown, the Beidou wide-area timing system of the present invention includes a data terminal, a product terminal, a communication link and a user terminal. At the data terminal, the laboratory continuously monitors the difference between the BDS system time and UTC (Coordinated Universal Time, Universal Time) and Real-time transmission back to the data center; global or regional reference station network observation data, real-time transmission back to the data center through network communication; the data center downloads and updates the latest navigation messages, station information, and table files required for various calculations in real time; These data together constitute the data source of the Beidou wide-area precision timing system.

[0099] On the product side, based on the BDS system time and UTC...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a Beidou wide area timing system and method. The Beidou wide area timing method comprises the following steps: obtaining a phase observation value and a pseudo-range observation value of a China Beidou satellite navigation system of each ground Beidou tracking station network, time difference monitoring data of the time of the China Beidou satellite navigation system and the Beijing time of a laboratory atomic clock group, a satellite ephemeris of the China Beidou satellite navigation system, earth rotation and antenna phase center parameters; performing preprocessing of data check, gross error elimination and cycle slip detection on the obtained data; performing error model correction and fine data processing on the preprocessed data; encoding the corrected data togenerate a telegraph text, and uploading the telegraph text to a communication satellite for broadcasting; and performing, by a user, non-difference precise timing solution and time difference parameter correction on the received corrected data and the local observation data to obtain a user local time consistent with the standard time. By adoption of the Beidou wide area timing system and methoddisclosed by the invention, single-station wide area timing service can be achieved, the timing precision is high, the operability is high and the action range is limited.

Description

technical field [0001] The invention relates to the technical field of Beidou satellite timing, in particular to a Beidou wide-area timing system and method. Background technique [0002] Accurate timing plays an important role in national defense and military activities such as rocket launch, precise missile control, and satellite formation flight. High-precision time-frequency measurement based on an all-weather, global satellite navigation system is a new technology that has been widely studied and used. The United States has made important progress in GPS satellite timing, and occupies an important weight in participating in international time comparisons. China's BDS (BeiDou Navigation Satellite System, Beidou Satellite Navigation System) timing is catching up with the construction and improvement of the basic system. . [0003] The current BDS (Beidou Satellite Navigation System) one-way timing accuracy is on the order of 20-100ns, and the two-way timing accuracy is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G04R20/02
CPCG04R20/02
Inventor 涂锐卢晓春张鹏飞张睿张兴刚刘金海黄小东
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap