Microwave radiation measurement system and measurement method for satellite-borne one-dimensional comprehensive aperture

Abstract

The invention discloses a microwave radiation measurement system for satellite-borne one-dimensional comprehensive aperture. The system comprises a scene radiometer receiver array, a calibration radiometer receiver, and a vibrating mobile phase network. The scene radiometer receiver array is used for receiving a scene microwave signal and an equivalent power internal noise source coherent signal and outputting an intermediate frequency signal. The calibration radiometer receiver is used for receiving a cold air external calibration signal and the equivalent power internal noise source coherentsignal, and calibrating through the cold air external calibration signal and a matching load so as to utilize the calibrated radiometer receiver to measure the equivalent power internal noise sourcecoherent signal in real time. The scene radiometer receiver array and the calibration radiometer receiver share the vibrating mobile phase network, so that the vibrating mobile phase network suppliesrequired local oscillator signals to the scene radiometer receiver array and the calibration radiometer receiver. The microwave radiation measurement system is simple in structure and easy to realize,and has the advantages of capable of measuring the equivalent power internal noise source coherent signal in real time, reducing the stability requirement of the equivalent power internal noise source coherent signal and the engineering realization difficulty, and improving the phase scaling precision.

Description

technical field [0001] The invention relates to the technical field of spaceborne microwave radiation measurement, in particular to a spaceborne one-dimensional synthetic aperture microwave radiation measurement system and a measurement method. Background technique [0002] The microwave radiometer has the characteristics of not being disturbed by climatic conditions and no need for light. It has the ability to work all-weather and all-weather, and can even penetrate the surface and vegetation at a certain depth. It has been valued by aerospace powers and is widely used in meteorology, ocean, Land resources, environment, astronomical observation and deep space exploration. [0003] In order to realize the high spatial resolution of the spaceborne microwave radiometer, a large-aperture antenna is required. The increase of the antenna caliber brings difficulties to processing and mechanical scanning. Synthetic aperture radiation detection can avoid this difficulty, but the sys...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a spaceborne one-dimensional synthetic aperture microwave radiation measurement system and method based on high-precision amplitude-phase calibration, which can coordinate the calibration system to accurately measure the scene and reduce the engineering cost of high-precision amplitude-phase calibration. Difficulty, to solve the shortcomings of the existing one-dimensional synthetic aperture radiation measurement technology

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