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

A technology that enhances information and precise time. It is applied in satellite radio beacon positioning system, advanced technology, climate sustainability, etc. It can solve problems such as complicated operation and implementation, and cannot meet the needs of concurrent use. The method is simple, reliable, convenient and real-time Effects of Applying, Raising Correction Levels

Active Publication Date: 2022-07-12
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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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

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

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Embodiment Construction

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

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

[0035] 1) Enhanced information extraction on the Beidou base station of the Time Lab, and the following observation models are used for the extraction of enhanced information:

[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 enhancement information, ρ is the station-star geometric distance, model is the sum of the modeling errors, including relativity, tide, Antenna phase center, troposphere, and Earth rotation errors.

[0038] 2) The time transfer solution based on the enhanced information ...

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Abstract

The invention discloses a Beidou local precision time transmission method based on enhanced information of a time laboratory. The observation value of the Beidou satellite is extracted, and the enhanced information of the Beidou satellite containing the standard time signal is extracted, and broadcasted through the network. The time user receives the enhanced information, and combines the collected observation data and the received ephemeris products to perform non-difference PPP solution to obtain The time difference with the standard clock, so as to realize the precise time transfer of the national standard time. The method of the invention can eliminate or weaken the common error, improve the correction level of the observation value error, improve the time transfer precision, and can improve the correction level of the observation value error of the user station.

Description

technical field [0001] The invention relates to the technical field of precise timing, time synchronization and time-frequency transmission, in particular to a Beidou local precision time transmission method based on time laboratory enhancement 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 applications in power networking, 5G communications, financial securities and other industries. The time transfer method based on satellite technology is low cost, good continuity, and easy to implement. become one of the important means. [0003] The carrier-phase precision single point positioning (PPP) time transfer method in satellite time transfer has become the current mainstream technology due to its high accuracy, and has been widely used in many time laboratories; however, the current PPP time transfer method has three limitations: First, many errors in non-d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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