Data fusion based spaceborne distributed integrated aperture microwave radiometer system

Abstract

A data fusion based spaceborne distributed integrated aperture microwave radiometer system comprises a data fusion processing subsystem and at least N*M completely identical integrated aperture microwave radiometer subsystems, and N and M are decided by a ratio of the spatial resolution in the directions along and crossing the orbit of the whole system to the spatial resolution in the directions along and crossing the orbit of the data fusion processing subsystem; all the integrated aperture microwave radiometer subsystems are all arranged in the same orbit height, and projection grids of theintegrated aperture microwave radiometer subsystems in the ground are arranged and overlapped regualarlly; and each integrated aperture microwave radiometer subsystem obtains a brightness temperatureimage of the ground and records the brightness temperature image as an original brightness temperature image; and the data fusion processing subsystem determines a brightness temperature value of thewhole system in the projection grids, recorded as refined grids, of the ground in a data fusion manner according to original grid overlap relation of each integrated aperture microwave radiometer subsystem, namely, determines high-resolution brightness temperature data after data fusion. The high-resolution brightness temperature data is improved by N and M times in the directions along and crossing the orbit.

Description

technical field [0001] The invention relates to a space-borne distributed synthetic aperture microwave radiometer system based on data fusion, which belongs to the field of space microwave remote sensing technology. 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 micro...

AI Technical Summary

Problems solved by technology

For large 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 complex, and the mass increase and antenna deformation brought by large array antennas restrict the performance of synthetic aperture microwave radiometers. scale, which in turn limits its further improvement in 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.

Images