Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Beidou local precise time transfer method based on time laboratory enhanced information

A technology for enhancing information and precise time, applied in satellite radio beacon positioning systems, advanced technology, climate sustainability, etc. Simple and reliable, the effect of improving the level of correction

Active Publication Date: 2020-08-25
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The carrier phase precise point positioning (PPP) time transfer method in satellite time transfer has become the current mainstream technology because of its high precision, and has been widely used in many time laboratories; however, the current PPP time transfer method has three limitations: First, many errors in non-difference observations are difficult to deal with efficiently, and the accuracy of time transfer can be further improved; second, conventional PPP time transfer is implemented point-to-point, which cannot meet the concurrent use needs of a large number of users; third, conventional PPP requires professional technology Only personnel and software can achieve high-precision time transfer, and the operation is complicated

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 local precise time transfer method based on time laboratory enhanced information
  • Beidou local precise time transfer method based on time laboratory enhanced information
  • Beidou local precise time transfer method based on time laboratory enhanced information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0034] The Beidou local precision time transfer method based on time laboratory enhanced information mainly includes two core technologies:

[0035] 1) Enhanced information extraction on the Beidou reference station of the time laboratory, the extraction of enhanced information adopts the following observation model:

[0036]

[0037] Among them, P and Φ represent the pseudorange and phase, L is the combined observation value without ionosphere, R is the reference station mark, Cor represents the enhanced information, ρ is the geometric distance between stations and stars, and model is the sum of modeling errors, including troposphere, relativity, Tides, antenna phase center, troposphere and Earth rotation errors.

[0038] 2) The time transfer calculation of the user te...

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 local precise time transfer method based on time laboratory enhanced information. The method comprises the following steps: constructing a Beidou reference station, connecting a receiver clock with a standard time signal of a national timing center time laboratory of the Chinese Academy of Sciences; based on an observation value of a Beidou reference station, extracting and broadcasting Beidou satellite enhancement information containing standard time signals in a network mode, a time user receiving the enhancement information, performing non-differential PPP calculation in combination with collected observation data and a received ephemeris product, obtaining the time difference with a standard clock, and therefore achieving precise time transmission of national standard time. The method provided by the invention can eliminate or weaken common errors, improve the observation value error correction level, improve the time transfer precision, and improvethe correction level of the observation value errors of the user station.

Description

technical field [0001] The invention relates to the technical fields of precision timing, time synchronization and time-frequency transmission, in particular to a Beidou local precision time transmission method based on time laboratory enhanced information. Background technique [0002] Time transfer is an important means to achieve high-precision time synchronization between time users. It has a wide range of application requirements in power networking, 5G communications, financial securities and other industries. The time transfer method based on satellite technology is low in cost, good in continuity, and easy to implement. become one of the important means. [0003] The carrier phase precise point positioning (PPP) time transfer method in satellite time transfer has become the current mainstream technology because of its high precision, and has been widely used in many time laboratories; however, the current PPP time transfer method has three limitations: First, many e...

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): G01S19/03G01S19/25
CPCG01S19/03G01S19/256Y02D30/70
Inventor 涂锐卢晓春张鹏飞张睿韩军强范丽红鲁洋为
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com