A Spaceborne Distributed Synthetic Aperture Microwave Radiometer System and Design Method

Abstract

A space-borne distributed synthetic aperture microwave radiometer system and design method, the system is composed of multiple small synthetic aperture microwave radiometer systems arranged according to a certain distributed structure, the spatial resolution of the entire system is determined by the entire distributed arrangement Determined by the maximum physical size of the antenna array. The hardware structure of all small synthetic aperture microwave radiometer systems is exactly the same, including antenna array, receiver channel array, signal acquisition subsystem, sub-band division subsystem, correlation processing subsystem, brightness temperature inversion subsystem, satellite communication subsystem, etc. The entire system adopts a distributed architecture, which has the advantages of mobility, flexibility, and strong fault redundancy; at the same time, it reduces the difficulty of system manufacturing, facilitates mass production, and reduces the cost of a single system.

Description

technical field [0001] The invention relates to a space-borne distributed synthetic aperture microwave radiometer system and a design method, and belongs to the technical field of space microwave remote sensing. Background technique [0002] The microwave radiometer system is an important payload of spaceborne passive microwave remote sensing, which can mainly obtain important global physical parameters, such as soil moisture, ocean salinity, atmospheric temperature and humidity, etc. At present, microwave radiometer systems mainly include real aperture microwave radiometer system, phased array microwave radiometer system, synthetic aperture microwave radiometer system, etc. However, because the microwave radiometer system of the existing system is limited in obtaining high-spatial-resolution passive microwave remote sensing images, further improving the spatial resolution of space-borne passive microwave remote sensing has always been an important issue in passive microwave...

AI Technical Summary

Problems solved by technology

For large-scale synthetic aperture microwave radiometers, due to the large number of antenna units and channel units, the system hardware structure and signal processing will be very complicated. Factors such as increased weight and antenna deformation caused by large array antennas restrict The scale of the system limits its further improvement of spatial resolution

[0007] To sum up, the spaceborne microwave radiometer system of the existing system is limited by factors such as large array antenna, heavy scanning platform or complex system hardware structure and signal processing to further improve the spatial resolution.

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