A Sea Wave Slope Inversion Method Based on an Improved Quasi-mirror 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 ocean waves with small incident angles, and more specifically, relates to an ocean wave slope inversion method based on an improved quasi-mirror sea surface scattering model. Background technique [0002] The ocean is a huge treasure house of resources, and at the same time an important barrier for national defense and coastal defense. It is of great significance to the world's sustainable new development and peaceful development. Ocean waves are the most intuitively observed ocean phenomenon. 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. Sea wave slope is an important physical parameter of sea waves and is the basis of wave research. The accuracy of wave inversion depends on the accuracy of the wave slope distribution model. Through the ...

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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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