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A Method of Detecting Sea Surface Wave Height Using S-band Doppler Radar

A technology of Doppler radar and Doppler spectrum, which is applied in the field of detecting sea surface wave height with S-band Doppler radar, can solve problems such as difficult to meet actual needs, achieve simple and fast processing methods, meet real-time work requirements, volume small effect

Active Publication Date: 2020-02-14
WUHAN UNIV
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Problems solved by technology

[0002] Waves near the shore play a very important role in shipping and port safety. Traditional measurement methods such as buoys, submersible buoys, and oceanographic survey ships can only provide local effective ocean data, which is difficult to meet actual needs.

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  • A Method of Detecting Sea Surface Wave Height Using S-band Doppler Radar
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  • A Method of Detecting Sea Surface Wave Height Using S-band Doppler Radar

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Embodiment Construction

[0056] The present invention will be further described below with specific examples in conjunction with the accompanying drawings.

[0057] Ocean waves are the propagation of the undulating shape of the sea surface. It is a kind of fluctuation formed by the water particle leaving the equilibrium position, vibrating periodically, and propagating in a certain direction. The velocity of the water particle on the sea surface can be calculated by the following formula:

[0058] u(t)=U 0 cos(ωt)+v c +v s (5)

[0059]

[0060] In the formula: u(t) and w(t) are the horizontal component and vertical component of water particle velocity respectively, v c is the radial velocity of the ocean current, v s is the phase velocity of the effective scatterer, k and ω are the wave number and frequency corresponding to the water particle capillary wave respectively, d is the water depth, and C is the phase velocity of the long gravity wave, which is generally much larger than v s and v ...

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Abstract

The present invention relates to a method for detection of a sea level wave height through adoption of an S-waveband Doppler radar. The method comprises: the step 1, employing an S-waveband Doppler radar to obtain a sea echo Doppler spectrum, extracting the center frequency of the obtained N-frame Doppler spectrum, obtaining a center frequency sequence, and obtaining a measured radial speed sequence according to the Doppler effect; the step 2, removing an average value for the vertical speed measured by the radar, and performing discrete Fourier transformation and Modulo square to obtain a speed spectrum; the step 3, according to the linear wave theory, obtaining the conversion relation of the speed spectrum and a sea wave spectrum, and obtaining the sea wave spectrum; the step 5, according to the mathematic relation between the efficient wave height and the sea wave spectrum, employing the spectral moment method to obtain the wave height; and the step 5, employing the zero-moment singular value removal method to allow the abnormal efficient wave height to recover normality. The method for detection of sea level wave height through adoption of the S-waveband Doppler radar provides a new detection means for obtaining the sea level wave height through adoption of a microwave Doppler radar, has high detection precision and wave field spatial resolution, and is simple and clear in results.

Description

technical field [0001] The invention belongs to the field of radar detection, in particular to a method for detecting sea surface wave height by using S-band Doppler radar. Background technique [0002] Nearshore waves play a very important role in shipping and port safety. Traditional measurement methods such as buoys, submersible buoys, and oceanographic survey ships can only provide local effective ocean data, which is difficult to meet actual needs. With the rapid development of new technologies such as computers, wireless electromagnetic waves are gradually applied to the field of ocean monitoring. S-band Doppler radar can detect the sea surface wave height information near the coast, and because of its small size, less environmental interference, and high measurement accuracy, it has gradually developed into a new method for monitoring the marine environment. For S-band Doppler radar, when the incident angle is large, Bragg scattering occurs between the sea surface an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88
CPCG01S13/88
Inventor 陈泽宗谢飞赵晨陈佩弦
Owner WUHAN UNIV
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