A Sliding Circular Synthetic Aperture Radar Imaging Method

A synthetic aperture radar and sliding technology, which is applied in the field of microwave imaging technology for earth observation, can solve the problem of unfavorable observation application without sliding circular synthetic aperture radar, and the inability to realize large-strip high-resolution omnidirectional imaging observation To achieve the effect of large-scale high-resolution omni-directional circumferential imaging data acquisition and imaging processing

CN104090277BActive Publication Date: 2016-09-28INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-09-28

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Abstract

The invention discloses a method for imaging circumferential synthetic aperture radar. The method comprises the steps of S1, the pitching direction and course direction-3dB beam width, the pulse repetition frequency and circling motion center sliding distance of a radar receiving and sending antenna are calculated when the sliding circumferential synthetic aperture radar is imaged; S2, the observation scene of the radar receiving and sending antenna is controlled to conduct irradiating according to attitude parameters output by a platform inertia navigation measuring system or attitude parameters output by a radar inertia navigating measuring system and platform position information, and echo signals of the observation scene are achieved; S3, according to the imaging echo data of the sliding circumferential synthetic aperture radar, the two-dimensional or three-dimensional image of the observation scene is acquired through coherence stacking processing.
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Description

technical field

[0001] The invention relates to the field of microwave imaging technology for earth observation, in particular to a sliding-type circular synthetic aperture radar imaging method. Background technique

[0002] In the mid-to-late 1990s, Falconer et al. first proposed the three-dimensional imaging method of Circular Synthetic Aperture Radar (CSAR for short) (see Falconer D G, Moussally G J. Tomographic imaging of radar sata gathered on a circular flight path about a three -dimensional target zone.Proceedings of SPIE1995,Apr.,1995.), the radar sensor performs 360°circular motion with the platform, and the beam always points to the same scene area to observe the area, so as to realize the three-dimensional imaging data acquisition of the observation area; subsequently, Soumekh In order to achieve a finer three-dimensional imaging capability, proposed the E-CSAR (Elevation Circular SAR, referred to as E-CSAR) imaging method (see SoumekhM. Synthetic aperture radar s...

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] The present invention provides a kind of new sliding type circumferential synthetic aperture radar imaging method, with conventional circumferential synthetic aperture radar imaging (such as figure 1 shown) compared with the sliding circular synthetic aperture radar imaging (Sliding CSAR, referred to as S-CSAR) by "sliding" forward, such as figure 2 As shown, the imaging area can be greatly expanded while retaining its advantages of conventional imaging.

[0020] For the convenience of description, it is explained in combination with the imaging geometry of the sliding circular synthetic aperture radar. Such as figure 2 As shown, when the platform moves, the three-dimensional position coordinates of the radar t...