Three-dimensional antenna array synthetic aperture radiometer segmented image inversion method

Abstract

The invention discloses a three-dimensional antenna array synthetic aperture radiometer segmented image inversion method. The method includes diving an observation view field interval into N subintervals; putting an external correction source in each of the divided N view field intervals; sequentially measuring visibility functions of the external correction sources output by the three-dimensional antenna array synthetic aperture radiometer in the N view field subintervals, and obtaining phase angles of the visibility functions; performing simulation calculation on the phase of the visibility function under the condition that the three-dimensional antenna array synthetic aperture radiometer only has two-dimensional coordinates; sequentially subtracting the phase angle obtained by simulation from the phase angles measured in the N view field subintervals to obtain phase compensation angle of the nth view field subinterval; using the three-dimensional antenna array synthetic aperture radiometer to observe a target scene, and sequentially performing image inversion on the divided N view field subintervals; and splicing inversion images in the N view field subintervals into an inversion image in the whole view field. The method is relatively high in precision, and has relatively good application prospects.

Description

technical field [0001] The invention relates to the technical fields of microwave remote sensing, target detection and deep space detection, in particular to a segmented image inversion method of a three-dimensional antenna array synthetic aperture radiometer. Background technique [0002] The synthetic aperture radiometer uses multiple discrete small antennas to synthesize an equivalent large antenna aperture, and adopts a sparse array arrangement to reduce the mass and volume of the antenna, which can improve the spatial resolution of passive microwave remote sensing and detection equipment. In order to ensure the quality of the inverted image, the antenna array of the synthetic aperture radiometer can only be arranged into a one-dimensional linear array and a two-dimensional planar array. In applications such as target detection and deep space exploration, it is inevitable to arrange the antenna array in a three-dimensional array. [0003] At present, there are no report...

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Problems solved by technology

[0004] Aiming at the defect of poor inversion accuracy of the three-dimensional antenna array synthetic aperture radiometer and the need for improvement, the present invention provides a segmented image inversion method of the three-dimensional antenna array synthetic aperture radiometer, whose purpose is to accurately invert the three-dimensional antenna array synthetic Scene brightness temperature distribution image from aperture radiometer

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