ACMART method for GNSS ionosphere chromatography

An ionosphere and multiplication technology, applied in the field of ACMART, can solve the problems of not considering the influence of grid electron density, affecting the accuracy of ionospheric tomography inversion, noise errors, etc.

Active Publication Date: 2020-11-24
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

[0007] Ionospheric tomography distributes the error between the measured value and the retrieved value of the ionospheric total electron content according to the weight ratio of the intercept. However, this method only uses the ray intercept as the only basis for error distribution, and does not consider Effect of grid electron density on the model;
[0008] The iterative relaxation factor of this method is a fixed constant, which le

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  • ACMART method for GNSS ionosphere chromatography
  • ACMART method for GNSS ionosphere chromatography
  • ACMART method for GNSS ionosphere chromatography

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[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] refer to figure 1 , an ACMART method for GNSS ionospheric tomography comprising the steps of:

[0046] S1, using the intercept of the ray passing through the grid to multiply the grid electron density, construct a new iterative model, and redistribute the error between the measured value and the inversion value of the total electron content of the ionosphere in the grid with different electron densities ;

[0047] S2, developing an adaptive iteration factor;

[0048] S3, according to the continuity and smoothness distribution characteristics of ionospheric electron density between adjacen...

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Abstract

The invention discloses an ACMART method for GNSS ionosphere chromatography. The method comprises the following steps: S1, building a new iterative model through the multiplication of the intercept ofa ray passing through a grid and the electron density of the grid, and redistributing an error between a measured value and an inversion value of the total electron content of an ionosphere in gridswith different electron densities; S2, developing a self-adaptive iteration factor; and S3, carrying out smooth constraint according to the continuity and smoothness distribution characteristics of the electron density of the ionized layer between the adjacent grids. The method has important application value in GNSS navigation positioning precision improvement and disaster reduction and prevention capability of the space environment.

Description

technical field [0001] The invention relates to GNSS ionosphere chromatography technology, in particular to an ACMART method suitable for GNSS ionosphere chromatography. Background technique [0002] At present, ionospheric tomography is a multi-dimensional ionospheric detection technology that can effectively invert ionospheric electron density. In 1986, Austen et al. first proposed the idea of ​​ionospheric tomography technology: using multiple satellite ground stations to measure the total electron content (Total Electron Content, TEC) of the ionosphere on the propagation path, and using tomography technology to reconstruct the ionospheric The two-dimensional electron density distribution of the ionosphere, after which many experiments and theoretical studies on this idea have been carried out in the world, and the reconstruction of the three-dimensional and even four-dimensional ionosphere structure has been realized, which can not only reflect the horizontal structure c...

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Application Information

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IPC IPC(8): G06F30/20G01S19/07G06F111/04
CPCG06F30/20G01S19/072G06F2111/04
Inventor 汤俊刘淑琼
Owner EAST CHINA JIAOTONG UNIVERSITY
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