Atmospheric temperature profile direct inversion method and system

Abstract

The invention discloses an atmospheric temperature profile direct inversion method and system. The method comprises the following steps that: S1, a background error covariance matrix is calculated based on a real atmospheric temperature profile and a forecast background field; S2, an observation error covariance matrix is calculated based on ideal visibility data and visibility data observed by asynthetic aperture microwave radiometer; and S3, the forecast background field and the actually observed visibility function are substituted into a one-dimensional variational function, so that an objective function can be obtained, and the minimum value of the objective function is solved based on the obtained observation error covariance matrix and the background error covariance matrix, so thata to-be-inverted atmospheric temperature profile can be obtained. According to the atmospheric temperature profile direct inversion method and system of the invention, the visibility function data ofthe remote sensing measurement of the synthetic aperture microwave radiometer can be inputted into the variational objective function; atmospheric temperature profile physical parameters are obtainedthrough iterative solution; a step of reconstructing brightness temperature in an existing method can be omitted; and therefore, direct inversion from the visibility function to the atmospheric temperature profile is achieved, and higher inversion precision is achieved.

Description

technical field [0001] The invention belongs to the technical field of atmospheric microwave remote sensing and detection, and more specifically relates to a direct inversion method and system of an atmospheric temperature profile. Background technique [0002] In the process of microwave radiation transmission, there will be absorption and scattering effects with atmospheric components such as clouds and rain. Therefore, microwave atmospheric detection can effectively obtain the physical characteristics and thermal structure of the atmosphere inside the atmosphere. The spaceborne microwave radiometer also has the advantages of high temporal and spatial resolution. It can invert various atmospheric physical parameters including atmospheric temperature and humidity profiles through passive observation of brightness temperature, and is widely used in meteorology. field. At present, spaceborne microwave radiometers are mainly divided into two types: synthetic aperture radiomet...

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Problems solved by technology

[0005] In view of the defects of the prior art, the purpose of the present invention is to propose a direct inversion method of the atmospheric temperature profile, which aims to solve the problem of low precision in the prior art due to the ill-posed ill-posed problem of reconstructing the brightness temperature

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