Sea wave slope inversion method based on improved quasi-mirror-image sea surface scattering model

Abstract

The invention discloses a sea wave slope inversion method based on an improved quasi-mirror-image sea surface scattering model. According to the method, four-order approximation expansion is performed on structure functions of sea-surface random height based on a backscattering coefficient of a physical optical model to obtain a backscattering coefficient of a four-order geometric-optical model, truncation effects exist when radars observe (the radars cannot see sea waves smaller than electromagnetic wave lengths), slope variance of filters is defined to replace previous model parameters, sea surface anisotropy and quasi-gaussian distribution characteristics are considered to obtain the improved quasi-mirror-image sea surface scattering model FGO4, the improved model, a certain incidence angles and air speed ranges are applied to inversion of sea wave quasi-gaussian slope parameters. According to the method, accuracy of a low-angle sea surface scattering analysis model is improved, the sea wave quasi-gaussian slope parameters are successfully inversed based on the model, and more accurate sea wave slope parameters are provided for other research.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing of sea waves with small incident angles, and more particularly relates to a sea wave slope inversion method based on an improved quasi-mirror sea surface scattering model. Background technique [0002] The ocean is a huge treasure trove of resources, and it is also an important barrier for national defense and coastal defense, which is of great significance to the sustainable new development and peaceful development of the world. Ocean waves are an ocean phenomenon that we can observe most intuitively. The study of ocean waves also provides important parameters for ocean research, contributes to the cause of coastal defense, and is of great significance to the development of marine economy. Ocean wave slope is an important physical parameter of ocean waves and the basis of ocean wave research. The accuracy of ocean wave inversion depends on the accuracy of the ocean wave slope dis...

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Problems solved by technology

[0004] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a method for inversion of the slope of ocean waves based on an improved quasi-mirror sea surface scattering model, which improves the accuracy of the small incident angle sea surface scattering analytical model, and based on the model Successfully inverted the quasi-Gaussian slope parameters of ocean waves, providing more accurate ocean wave slope parameters for other research, thereby solving the existing problems in the existing technology that cannot invert high-order ocean wave slope parameters, or the inversion accuracy of high-order slope parameters is low, etc. question

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