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
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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 w

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  • 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

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[0033] The present invention will be further described below in conjunction with the 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 time laboratory enhanced information mainly includes two core technologies:

[0035] 1) The enhanced information extraction on the Beidou reference station of the time laboratory, 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 enhanced information, ρ is the geometric distance of the station star, and model is the sum of modeling errors, including troposphere, relativity, Tides, antenna phase center, troposphere and earth rotation errors.

[0038] 2) The user-side time transfer solution based on enhanced information...

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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

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Application Information

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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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