Numerical simulation method for radar backscattering section of wave-current coupling sea surface

A technology of backscattering cross-section and sea surface simulation, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that the interaction mechanism is not fully understood, and cannot meet quasi-real-time, large-area simultaneous measurement, and ocean current remote sensing Problems such as the lack of inversion methods, to achieve the effect of promoting research

Active Publication Date: 2016-06-29
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

Therefore, all-weather and large-scale monitoring of ocean surface currents is very important. Although people can use Acoustic Doppler Current Profiler (ADCP) to accurately measure sea surface and underwater current profiles, similar direct measurement methods are far from satisfying quasi-real-time, The demand for large-area simultaneous measurement, satellite remote sensing has become the only means to meet this demand
Unfortunately, so far, although there are sporadic and limited algorithms for inversion o...

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  • Numerical simulation method for radar backscattering section of wave-current coupling sea surface
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  • Numerical simulation method for radar backscattering section of wave-current coupling sea surface

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[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] The technical problem to be solved by the present invention is: to obtain the relationship between wave-current coupled sea surface and electromagnetic wave interaction. In order to solve this technical problem, the present invention proposes the following technical solutions:

[0024] Include the following steps:

[0025] Step 1: Set sea surface simulation parameters and radar parameters, sea surface simulation parameters include: effective wave height h s , wave dominant wavelength λ 0 , amplitude and frequency scale factor b, fractal sea surface roughness coefficient s and main wave wave number Κ 0 =2π / λ 0 ;Radar parameters include: radar exposure scale range L, radar incident angle θ, radar wavelength λ, radar incident wave number k=2π / λ;

[0026] Step 2: Calculate the sea surface height according to the sea surface simulation parameters and radar parame...

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Abstract

The invention discloses a numerical simulation method for a radar backscattering section of a wave-current coupling sea surface. The method comprises the following steps: setting sea surface simulation parameters and radar parameters to establish a wave-current coupling electromagnetic scattering model according to a sea surface state to be simulated by a user and an adopted radar sensor type; acquiring a wave-current coupling sea surface evolution process and a representative transient sea surface; further inversing a radar backscattering coefficient gamma and deducing a normalized radar backscattering section sigma 0 according to the wave-current coupling electromagnetic scattering model by virtue of the Huygens principle, Kirchhoff approximation and a Dirac green function. According to the method, a wave-current coupling sea surface and electromagnetic wave interaction mechanism can be acquired, researches on wave-current coupling electromagnetic scattering characteristics can be promoted, and the method can be adopted as a technical means for research and development of sea current radar retrieval.

Description

technical field [0001] The invention belongs to the technical field of marine technology, and in particular relates to a wave-current coupled sea surface radar backscatter cross section numerical simulation method. Background technique [0002] Ocean currents have a decisive impact on the ocean environment. It is the transport link of energy and nutrients. At the same time, it can also disperse marine garbage and various polluted water bodies to all corners of the global ocean, thereby affecting global water bodies and air-sea exchanges. Therefore, all-weather and large-scale monitoring of ocean surface currents is very important. Although people can use Acoustic Doppler Current Profiler (ADCP) to accurately measure sea surface and underwater current profiles, similar direct measurement methods are far from satisfying quasi-real-time, Satellite remote sensing has become the only means to meet the demand of large-area synchronous measurement. Unfortunately, so far, although ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 谢涛何宜军
Owner NANJING UNIV OF INFORMATION SCI & TECH
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