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

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...

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