Bistatic/multistatic radar image PS (permanent scatterer) point associating method based on sliding scattering center

A technology of sliding scattering center and bistatic radar, which is applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measurement devices, etc., and can solve the problem of severe decorrelation between radar images

Active Publication Date: 2015-08-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0012] The present invention proposes a bistatic/multistatic radar image PS point correlation method based on the sliding scattering center, which is used to solve the problem of multiple radars observing the same scene from different vie

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  • Bistatic/multistatic radar image PS (permanent scatterer) point associating method based on sliding scattering center
  • Bistatic/multistatic radar image PS (permanent scatterer) point associating method based on sliding scattering center
  • Bistatic/multistatic radar image PS (permanent scatterer) point associating method based on sliding scattering center

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[0049] The present invention provides a PS point correlation method of a bistatic / multistatic radar image based on a sliding scattering center. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0050] Such as figure 1 and figure 2 As shown, for the PS point target we need to analyze under different observation angles, its sliding scattering center is not at the same position, and its spatial spectrum occupies a different range in the two-dimensional wavenumber domain.

[0051] Such as image 3 As shown, for the PS point target, record the RCS value of each equivalent sliding scattering point on the target contour line σ 0 (x, y), remember that the position of the sliding scattering center on the same section of the target contour observed by radar 1, 2 and bistatic measurement 1.2 between 1 and 2 is S 1 ,S 2 ,S, monostatic radar image 1, 2 and S 1 ,S 2 The corresponding point is the point with the same name that nee...

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Abstract

The invention discloses a bistatic/multistatic radar image PS (permanent scatterer) point associating method based on a sliding scattering center, which accurately registers multiple SAR images viewed from different angles, and belongs to the field of bistatic/multistatic synthetic aperture radars. The method comprises: obtaining an approximate target outline scattering function by performing parabolic fitting on a PS point target outline function in a bistatic image; obtaining a homonymy point in a monostatic radar image by performing moving window search on the monostatic radar image; and finally, registering the monostatic radar image according to the homonymy point obtained through the search. The method fully utilizes the characteristics of the sliding scattering PS point target, solves a puzzle that a conventional PS point registering method is just capable of accurately registering images observed from a single angle, and has significant meaning to multi-angle radar image fusion and interference processing.

Description

technical field [0001] The invention relates to a bistatic / multistatic radar image PS point correlation method based on a sliding scattering center, and belongs to the bistatic / multistatic synthetic aperture radar technical field. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-weather high-resolution microwave remote sensing imaging radar that can be installed on aircraft, satellites, missiles and other flying platforms. Since its invention in the 1950s, it has been widely used in many fields, such as disaster control, vegetation analysis, microwave remote sensing and other fields. [0003] Bistatic / Multistatic SAR (Bistatic / Multistatic SAR) is an emerging radar system, which is characterized by the separation of the transmitting platform and the receiving platform in space. The radar system has unique advantages in many aspects: some radars are used as transmitters, and the rest are used as receivers to form a radar network that can obt...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9023G01S13/9058
Inventor 曾涛胡程王晶阳向寅龙腾毛二可
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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