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Full-polarization radar-based ice cover internal fabric and ice flow field distribution feature identification method

A feature recognition and flow field distribution technology, applied in the field of radar exploration, can solve the problems of complex electromagnetic wave propagation theory and restrictions on the application of multi-polarization radar, and achieve the effect of easy and fast measurement in a large area, flexible measurement methods, and avoiding high investment

Active Publication Date: 2019-01-29
ZHEJIANG UNIV
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Problems solved by technology

Multi-polarization radar has the potential to study the anisotropic characteristics of ice sheets, but the theory of electromagnetic wave propagation in multi-layer anisotropic ice layers is too complicated, which seriously restricts the application of multi-polarization radar in ice sheet research.

Method used

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  • Full-polarization radar-based ice cover internal fabric and ice flow field distribution feature identification method
  • Full-polarization radar-based ice cover internal fabric and ice flow field distribution feature identification method
  • Full-polarization radar-based ice cover internal fabric and ice flow field distribution feature identification method

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Embodiment Construction

[0040] The present invention will be described in detail below with reference to the accompanying drawings and preferred examples, and the purpose and effect of the present invention will become 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 examples described here are only used to explain the present invention, not to limit the present invention.

[0041] Such as figure 1 As shown, it is a flow chart of the identification method of ice sheet internal fabric and ice flow field distribution characteristics based on fully polarized radar. The key to identification technique 1 is to use the correlation relationship between the orientation tensor of the microstructure and the dielectric constant tensor to establish the relational expression between the reflection coefficient obtained by the macroscopic full polarization radar and the physical propertie...

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Abstract

The invention discloses a full-polarization radar-based ice cover internal fabric and ice flow field distribution feature identification method; a second order fabric orientation tensor and a dielectric constant tensor in an ice cover inner ice crystal have a correlation relation; the method uses a layer-by-layer recurrence method to solve the dielectric constant tensor and a corresponding rotating angle of each reflection layer in the ice cover according to full-polarization radar echo signals, thus further calculating an ice fabric second order orientation tensor feature value and identifying the fabric type, and extracting the ice flow direction and spatial distribution feature information thereof according to the fabric, stress deform and ice flow correlation relations. The identification method is fast, effective, lossless and low in invest cost, and the radar detection measuring mode is flexible and large in a measuring scope; the full-polarization radar measurement can be used to fast obtain the large scale ice cover internal fabric and the ice flow field spatial distribution information.

Description

technical field [0001] The invention belongs to the technical field of radar exploration, and relates to a method for identifying the internal fabric of an ice sheet and the distribution characteristics of an ice flow field based on a fully polarized radar. Background technique [0002] Ice crystal fabric is a technical term used to describe the statistical characteristics of the geometric distribution of the optical axis (C-axis) orientation of ice crystals. Ice crystal fabric is a product of the flow and evolution history of ice sheets. The position and depth of ice crystals will change during the flow and evolution of the ice sheet, and accordingly, the magnitude and direction of the stress will also change, causing the ice crystals to deform, and the direction of C-axis aggregation will also change accordingly, thus forming a variety of Fabrication type (random type, unipolar large, elongated unipolar large and vertical band structure, etc.). Ice crystal fabric preserv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/41
CPCG01S7/41G01S7/415G01S13/88G01S7/025G01S13/885G01S7/411
Inventor 王帮兵孙波王佳馨田钢石战结赵文轲
Owner ZHEJIANG UNIV
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