Method for using polar region ice exploring radar to extract polar region ice layer position

A technology for ice detection radar and ice layer, which is applied in the direction of using re-radiation, reflection/re-radiation of radio waves, measurement devices, etc. The effect of improving computing efficiency

Active Publication Date: 2014-02-26
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the problems that the traditional range migration algorithm based on stolt transform is only suitable for single-layer medium imaging, cannot adapt to the change of electromagnetic wave velocity and the algorithm is inefficient,

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  • Method for using polar region ice exploring radar to extract polar region ice layer position
  • Method for using polar region ice exploring radar to extract polar region ice layer position
  • Method for using polar region ice exploring radar to extract polar region ice layer position

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further explained in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] It should be noted that, in practical applications, some pre-order steps are also included before step S1, such as inputting the radar echo signal propagated in the multi-layer medium collected by the polar ice-penetrating radar into the processing device, and the processing device It is a variety of computing devices with digital computing capabilities, such as personal computers, servers, etc.

[0021] The invention proposes a layer extraction method of polar ice-penetrating radar based on a distance migration algorithm, and the algorithm is verified by actual measurement data. The parameters of the polar ice-penetrating radar system are shown in Table 1 below:

[0022] Table 1

[0023]

[0024] The schematic diagram of the w...

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Abstract

The invention discloses a method for using a polar region ice exploring radar to extract a polar region ice layer position. Two-dimensional Fourier transformation is performed on a radar echo signal propagating in a multilayered medium, and a two-dimensional frequency spectrum of the radar echo signal propagating in the multilayered medium is obtained; the two-dimensional frequency spectrum is multiplied by a reference phase factor, and a radar echo signal influenced by range migration is obtained; metric inverse Fourier transformation is used to perform range migration correction on the radar echo signal influenced by the range migration to converted to a range-Doppler domain, and radar echo signal with influence of a range migration factor linear term being eliminated is obtained; a secondary and tertiary range frequency compensation function and a reference function of azimuth direction compression are used to process the radar echo signal with influence of the range migration factor linear term being eliminated, and a fully compensated radar echo signal is obtained; and later azimuth direction Fourier inverse transformation is performed, a focused image is obtained, and by performing range coordinate contraction on the focused image, the position of a layer target detected by the polar region ice exploring radar is obtained.

Description

technical field [0001] The invention belongs to the technical field of polar ice-penetrating radar imaging, and relates to a method for extracting polar ice layers by using polar ice-penetrating radar. Background technique [0002] The polar ice-penetrating radar uses a transmitting antenna to transmit high-frequency and wide-band electromagnetic pulses, and receives reflected waves from the (underground) medium layer through a receiving antenna. When an electromagnetic wave propagates in a medium, its path, electromagnetic field strength, waveform, phase, etc. vary with the electromagnetic properties and geometry of the medium it passes through. Therefore, by detecting parameters such as echo time, amplitude, and phase, information such as target depth, medium characteristics, and structure can be calculated. In terms of data visualization, digital image restoration and reconstruction techniques can be used to image sub-ice targets in order to achieve a true and intuitive ...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/411G01S13/885
Inventor 赵博稂时楠刘小军张峰陈秀伟李俊柳青方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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