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Satellite-borne microwave radiation measurement system and measurement method

A radiation measurement and satellite-borne microwave technology, which is applied in electromagnetic wave detection and other directions, can solve the problems of high-precision calibration and large number of pairwise correlations, improve computing efficiency, avoid large-aperture antenna scanning difficulties, and achieve high resolution detection effect

Inactive Publication Date: 2019-12-10
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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Problems solved by technology

However, the two-dimensional synthetic aperture radiometer has a large number of array elements and a large number of pairwise correlations, making it difficult to calibrate with high precision. Integrated detection needs

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  • Satellite-borne microwave radiation measurement system and measurement method

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Embodiment Construction

[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] like figure 1 As shown, the present invention provides a spaceborne microwave radiation measurement system, comprising:

[0030] Large-diameter parabolic antenna 10, used to reflect the microwave radiation signal of the target scene;

[0031] 3 rows of dual-polarized one-dimensional sparse feed arrays 20 of different frequency bands are used to simultaneously receive target scene microwave radiation signals reflected by the large-aperture parabolic cylindrical antenna 10, and send the received target scene microwave radiation signals to the receiver machine channel array 30;

[0032] The receiver channel array 30 is used to amplify, filter, and down-convert the microwave radiation signal of the target scene into two signa...

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Abstract

The invention provides a satellite-borne microwave radiation measurement system and a measurement method. A one-dimensional synthetic aperture microwave radiation detection technology is adopted, three detection frequency bands are divided into three rows of linear feed source array arrangement, and a splicing technology of 21 high-precision solid surface is combined, so that the processing difficulty of the large-aperture high-precision deployable antenna is reduced, and the optimal compromise of the volume, the weight and the precision of a reflecting surface is realized. The visibility function is processed by adopting a novel weighted Fourier transform image reconstruction algorithm computer, so that the operation efficiency is improved, the calculation complexity is reduced, and the system error is corrected. A real aperture detection mode is adopted in the satellite flight direction, a one-dimensional synthetic aperture detection mode is adopted in the cross-orbit direction, high-precision and high-resolution detection is achieved, and meanwhile the problems that a large-aperture antenna is difficult to scan and the system complexity requirement of two-dimensional synthetic aperture detection is high in traditional real aperture radiation detection are solved.

Description

technical field [0001] The invention relates to a satellite-borne microwave radiation measurement system and a measurement method. Background technique [0002] Because of its cloud and rain penetration and all-weather detection capabilities, as well as the detection capabilities of the ocean and the interior of the earth's surface, microwave radiometers are widely used in meteorology, oceans, land, atmospheric environments, and deep space. The comprehensive aperture microwave radiometer effectively solves the problems of the large-aperture antenna processing and on-orbit mechanical scanning difficulties of the real aperture microwave radiometer through array sparseness, correlation reception, image reconstruction and other technologies, and greatly improves the spatial resolution of observation. Therefore, it has become a research hotspot in the field of microwave remote sensing in recent years. However, the two-dimensional synthetic aperture radiometer has a large number ...

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Application Information

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IPC IPC(8): G01V3/12
CPCG01V3/12
Inventor 赵锋赵永涛陈雄姚崇斌徐红新张喆李丹王平凯李秀伟
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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