Synthetic aperture radar imaging method and device

A technology of synthetic aperture radar and imaging method, which is applied in the field of radar, and can solve the problems of low mechanical scanning speed and difficulty in realizing sliding spotlight imaging, etc.
CN106950566AInactive Publication Date: 2017-07-14INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2017-07-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a synthetic aperture radar imaging method and device. The method comprises the steps that the first angular velocity and the imaging time of the SAR are determined, wherein the first angular velocity is the angular velocity of azimuth beam scanning when the SAR carries out sliding beaming imaging; the second angular velocity is determined according to the maximum mechanical rotation angular velocity of the SAR, wherein the second angular velocity is the angular velocity of mechanical scanning of the SAR; the third angular velocity is determined according to the first angular velocity and the second angular velocity, wherein the third angular velocity is the angular velocity of electrical scanning of the SAR; and the SAR is controlled to carry out mechanical scanning and electrical scanning according to the second angular velocity, the third angular velocity and the imaging time, so as to acquire echo data; and sliding beaming imaging is carried out based on the echo data.
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Description

technical field

[0001] The invention relates to the field of radar technology, in particular to a synthetic aperture radar imaging method and device. Background technique

[0002] Synthetic Aperture Radar (SAR) satellites carry SAR on satellites for earth observation. Due to the use of microwave imaging technology, all-day and all-weather observations can be realized, which is an important means of earth observation.

[0003] Sliding beamforming is an imaging mode of SAR satellites. This mode uses the azimuth beam to scan forward, slows down the ground movement speed of the beam footprint, and realizes high-resolution imaging. The azimuth resolution of the sliding beamforming mode is mainly determined by the scanning speed and the maximum scanning angle of the antenna azimuth beam.

[0004] There are two possible implementations of azimuth beam scanning, namely electrical scanning and mechanical scanning. Both can achieve azimuth beam scanning operation, but their characte...

Claims

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