Spaceborne distributed type synthetic aperture microwave radiometer system and design method

A technology of microwave radiometer and synthetic aperture, applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve heavy scanning platform system hardware structure and signal processing, system hardware structure and signal processing Complicated, large array antennas restrict scale and other issues, to achieve the effect of improving spatial resolution, strong fault redundancy, and reducing manufacturing difficulty

Active Publication Date: 2019-01-18
XIAN INSTITUE OF SPACE RADIO TECH
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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 syst

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  • Spaceborne distributed type synthetic aperture microwave radiometer system and design method
  • Spaceborne distributed type synthetic aperture microwave radiometer system and design method
  • Spaceborne distributed type synthetic aperture microwave radiometer system and design method

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[0039] Examples:

[0040] A design method of a spaceborne distributed synthetic aperture microwave radiometer system specifically includes the following steps:

[0041] (1) Analysis of system requirements: According to actual application requirements, determine the spatial resolution and sensitivity of the spaceborne distributed synthetic aperture microwave radiometer system, assuming that the spatial resolution is R respectively x , R y , The sensitivity is ΔT B ;

[0042] (2) The key indicators of each microwave radiometer subsystem: Determine each microwave radiometer subsystem according to the spatial resolution and sensitivity of the spaceborne distributed synthetic aperture microwave radiometer system, combined with actual engineering capabilities and engineering requirements The basic array and the number of basic units of the antenna array. When the basic array and the number of basic units of the antenna array are determined, the spatial resolution of each microwave radiomet...

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Abstract

The invention provides a spaceborne distributed type synthetic aperture microwave radiometer system and a design method. The system is formed by a plurality of small synthetic aperture microwave radiometer systems arranged according to a certain distributed structure, the space resolution of the whole system is determined by a maximum physical dimension of a whole distributed arrangement antenna array, hardware structures of all the small synthetic aperture microwave radiometer systems are completely the same, each small synthetic aperture microwave radiometer system comprises an antenna array, a receiver channel array, a signal acquisition subsystem, a sub-band division subsystem, a related processing subsystem, a brightness temperature inversion subsystem, and an inter-satellite communication subsystem etc. The whole system adopts the distributed structure, the system is advantaged by maneuverability, flexibility, and high redundant fault capability; besides, the manufacturing difficulty of the system is reduced, batch production is facilitated, and the cost of the single system can be reduced.

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...

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Application Information

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IPC IPC(8): G01S13/02
CPCG01S13/02G01S2013/0245
Inventor 卢海梁李一楠王佳坤宋广南李鹏飞杨小娇吕容川李浩胡泰洋
Owner XIAN INSTITUE OF SPACE RADIO TECH
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