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A method of ionospheric tomography and ionospheric delay correction based on multi-scale segmentation

An ionospheric delay and ionospheric technology, which is applied in the directions of electric/magnetic exploration, re-radiation of sound waves, and electromagnetic wave detection, etc., can solve the problem that the effect of reconstruction cannot be achieved, and does not fundamentally change the solution of the ionospheric tomography model. calculation mode, etc.

Inactive Publication Date: 2016-08-31
SOUTHEAST UNIV
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Problems solved by technology

For the improved iterative reconstruction algorithm, although the calculation efficiency and reconstruction quality have been improved to a certain extent, it still does not fundamentally change the solution mode of the ionospheric tomography model, resulting in the reconstruction effect still not reaching an ideal state

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  • A method of ionospheric tomography and ionospheric delay correction based on multi-scale segmentation
  • A method of ionospheric tomography and ionospheric delay correction based on multi-scale segmentation
  • A method of ionospheric tomography and ionospheric delay correction based on multi-scale segmentation

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[0060] specific implementation plan

[0061] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples. The following implementation examples are only used to explain the present invention, and do not limit the present invention.

[0062] The present invention takes Jiangsu Province as an example to illustrate the ionospheric tomography technology based on multi-scale subdivision and the correction method of ionospheric delay, including:

[0063] Step S101, determine the scope of the area, and extract ionospheric TEC, satellite and station coordinates and other data according to the CORS data in the area.

[0064] Use the CORS data provided by the Jiangsu CORS Center to determine the scope of the region, such as figure 2 shown. The positions of the stations are marked in the figure, and according to the positions of the stations, a small number of stations are ra...

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Abstract

The invention discloses an ionospheric tomography technology based on multi-scale subdivision and an ionospheric delay correction method. The three-dimensional space of the regional ionosphere is subdivided according to different "pixel" scales, thereby obtaining multiple different The single-scale ionospheric tomography model, the unknown variables of these models are uniformly solved, and according to different weight factors, finally weighted to obtain the solution of the multi-scale tomography model, the ionospheric electron density distribution in the region is reconstructed, and the regional ionospheric electron density distribution is obtained. Ionospheric delay. The ionospheric space activity law reconstructed by the invention has a high degree of fitting, strong timeliness, and is convenient to use; the regional ionospheric delay amount calculation result obtained according to the invention has high accuracy, which expands the application range of CORS measurement results. After analyzing the application results of a large number of engineering examples, the ionospheric electron density distribution reconstructed by the invention is smoother and more reasonable than the traditional single-scale ionospheric tomography model, and the accuracy of ionospheric delay correction is increased by 30% on average.

Description

technical field [0001] The invention relates to an ionospheric tomography technology and an ionospheric delay correction method based on multi-scale subdivision, and belongs to the application field of geodesy and spatial information technology. Background technique [0002] The ionosphere is the upper atmosphere 70-2000km from the earth's surface, mainly composed of the mesosphere, thermosphere and exosphere. However, when satellite signals pass through the ionosphere, a time delay (ionospheric delay) is generated, therefore, the accuracy of satellite navigation and positioning is significantly affected by the ionospheric delay. The ionospheric delay is generally expressed by the ionospheric total electron content (TEC), which is defined as the total number of electrons contained in a column that runs through the entire ionosphere along the signal propagation path when the bottom area is a unit area, that is, along the signal propagation path A linear integral of electron ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38G06F19/00G01V3/12
Inventor 胡伍生郑敦勇孙洪飞金旭辉
Owner SOUTHEAST UNIV
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