Rotating-reflection-surface-based imaging method and system of mirroring synthetic aperture radiometer

Abstract

The invention discloses a rotating-reflection-surface-based imaging method and system of a mirroring synthetic aperture radiometer. The method comprises: according to an antenna array, a reflection surface angle, and a distance between the reflection surface and the antenna array, an output function of the antenna array is obtained; a scene brightness temperature of the output function is discretized into a summation form to obtain a matrix equation containing scene brightness temperature image information; the reflection surface is rotated and the inclination angle of the reflection surface is changed by S times to obtain S matrix equations containing the scene brightness temperature image information, wherein the S is larger than or equal to 2; the S matrix equations containing the scene brightness temperature image information are combined into a target matrix equation; and the target matrix equation is inversed to obtain a scene brightness temperature image. The larger the frequency of rotation of the reflection surface, the smaller the angle of the rotation each time; and the larger the combined target matrix equation, the higher the scene brightness temperature image quality.

Description

technical field [0001] The invention belongs to the field of microwave remote sensing and detection technology, and more specifically relates to an imaging method and system based on a rotating reflector-based mirror synthetic aperture radiometer, which can be applied to remote sensors for earth remote sensing, lunar remote sensing, and deep space exploration. Background technique [0002] The synthetic aperture radiometer synthesizes multiple small antennas into an equivalent large antenna aperture, and arranges them in a sparse array, which reduces the weight and volume of the antenna, and solves the inherent contradiction between resolution and aperture size. But this advantage comes at the cost of system structure and signal processing complexity, especially in large synthetic aperture radiometer systems, such as spaceborne synthetic aperture radiometers. [0003] Mirrored aperture synthetic radiometers can be used to reduce the number of antenna elements or to increase ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a mirrored synthetic aperture radiometer and imaging method and system based on a rotating reflector, the purpose of which is to reduce the number of antennas and improve the resolution of the scene brightness temperature image, thereby Solve the technical problems of large number of antennas and high system complexity under the required scene brightness temperature image resolution

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