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Airborne circular SAR imaging method and device

An imaging method and technology of circular traces, which can be used in measuring devices, image enhancement, image analysis, etc., and can solve problems such as impact

Pending Publication Date: 2022-03-15
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0002] When performing airborne downward-looking SAR (Synthetic Aperture Radar, synthetic aperture radar) imaging measurement, the straight-line strip flight mode is often used. This mode can obtain the SAR image of the target at a certain azimuth angle. The direction has occlusion, shadow and other phenomena to the target imaging, which will affect the target SAR imaging

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  • Airborne circular SAR imaging method and device
  • Airborne circular SAR imaging method and device
  • Airborne circular SAR imaging method and device

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[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] As an emerging imaging mode, airborne circular SAR has the advantages of omnidirectional observation, high spatial resolution and three-dimensional imaging. With the continuous development of circular SAR imaging technology, airborne circular SAR has gradually become one of the effective means for precise observation of key areas. Com...

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Abstract

The invention relates to an airborne circular SAR (Synthetic Aperture Radar) imaging method and device, and one specific implementation mode of the method comprises the steps: converting original SAR data into a distance frequency domain, and then carrying out demodulation processing to obtain phase history data; converting the phase history data in the polar coordinate format into the phase history data in the rectangular coordinate format through two-dimensional resampling; performing two-dimensional inverse Fourier transform on the data after two-dimensional resampling to obtain a focused image; and performing geometric correction on the focused image to obtain a final circular SAR image. According to the embodiment, the target full-view two-dimensional high-resolution SAR image can be obtained.

Description

technical field [0001] The invention relates to the technical field of electromagnetic scattering characteristic measurement, in particular to an airborne circular SAR imaging method and device. Background technique [0002] When performing airborne downward-looking SAR (Synthetic Aperture Radar, synthetic aperture radar) imaging measurement, the straight-line strip flight mode is often used. This mode can obtain the SAR image of the target at a certain azimuth angle. If the direction has occlusion, shadow and other phenomena on the target imaging, it will affect the target SAR imaging. Contents of the invention [0003] Aiming at the defects in the prior art, the present invention provides an airborne circular SAR imaging method and device, which can obtain a two-dimensional high-resolution SAR image with a full viewing angle of the target. [0004] In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides an airborne c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G06T5/00
CPCG01S13/9021G06T2207/10044G06T2207/20056G06T5/80
Inventor 徐志明卢永革李胜姚京萍
Owner BEIJING INST OF ENVIRONMENTAL FEATURES