Application of periodic structure scattering in Kelvin ship wakes detection

Wei, Yinyu; Wu, Zhensen; Li, Haiying; Wu, Jiaji; Qu, Tan

doi:10.1016/j.scs.2019.101463

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…To investigate the impact of underwater object motion on electromagnetic scattering from the sea surface, Deng et al [16] developed a method that combines computational fluid dynamics with electromagnetic imaging. Wei et al [17] developed a method for detecting Kelvin ship wakes in SAR by utilizing periodic structure scattering calculations.…”

Section: Introductionmentioning

confidence: 99%

Study on the Composite Scattering Characteristics of Ship Target on the Sea Surface with Its Wake

Yang,

Zhao,

et al. 2023

PIER C

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Ship's movement on the sea surface will produce wake extending for several kilometers. In order to study the electromagnetic scattering characteristics of the composite scene of sea surface, ship, and wake, this paper combines geometric optics with physical optics (GO-PO), Kirchhoff approximation (KA) and facet scattering field model of sea surface to calculate the electromagnetic scattering characteristics of this composite scene. Firstly, the geometric model of the composite scene of sea surface and Kelvin wake is established by using Elfouhaily omnidirectional spectrum and classical ship wave generation theory. Secondly, the generated geometric overlay model of the wake and sea surface is combined with the ship to generate a composite scene model of the sea surface, ship, and wake. Finally, the scattering echoes of sea surface and wake are calculated by KA and facet scattering field model of sea surface, and the scattering echoes of ship is calculated by GO-PO. On this basis, the electromagnetic characteristics of the composite scene of sea surface, ship, and wake under different conditions are discussed. The research conclusion has certain reference value for the detection of ship and wake in complex sea conditions.

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Section: Introductionmentioning

confidence: 99%

Study on the Composite Scattering Characteristics of Ship Target on the Sea Surface with Its Wake

Yang,

Zhao,

et al. 2023

PIER C

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“…Yuxin et al [ 14 ] proposed a method combining computational fluid dynamics and electromagnetic imaging to study the effect of underwater motion of an object on electromagnetic scattering from the sea surface. Yinyu et al [ 15 ] proposed a method to study the wake detection of Kelvyn ships in SAR by periodic structure scattering calculation. Fuduo et al [ 16 ] proposed a submarine velocity estimation method based on wake wavelength and a diving depth inversion method based on Kelvin wake Fourier power spectrum.…”

Section: Introductionmentioning

confidence: 99%

Study on Doppler Spectra of Electromagnetic Scattering of Time-Varying Kelvin Wake on Sea Surface

Yang

Zhao

et al. 2022

Sensors

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In general, it is more practical to detect ship wake under the background of a complicated sea state than the ship directly. Thus, in this paper, the Doppler spectra of time-varying Kelvin wake on a time-varying sea surface are numerically investigated by considering the change of ship wake with time in ocean environments. For this purpose, the linear superposition model of a time-varying sea surface and a time-varying Kelvin wake is established. Combined with the facet scattering field model of sea surface and Kirchhoff approximation (KA), the Doppler of the radar scattering echo signal of the time-varying wake on the sea surface is simulated and analyzed under different polarizations, incident angles, ship speeds, and wind speeds, as well as wind directions. It can be observed that the Doppler spectrum changes as the conditions change. This study provides a reference for extracting motion features of ship wakes in a sea clutter environment.

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The Nonlinear Scattering Characteristics of Sound Waves by a Bubble

Teng

Liu

Zhang

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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The scattering characteristics of sound waves by bubbles have been widely applied to ship tracking, wake-homing torpedo and reverberation suppression. To explore the nonlinear scattering characteristics of sound waves by bubbles, the Keller-Miksis equation of bubble vibration was adopted and a numerical solution to the nonlinear equation is presented. Then, the characteristics of nonlinear scattering, including the intensity of the scattered waves, the frequency and radius selection under pulse excitation and the scattered wave duration, are studied. The nonlinear scattered waves by a bubble are too small to be detected when the intensity of the excitation source is small. As the intensity of the excitation source increases, so does that of scattered harmonics by the bubble. If the intensity of the excitation source is further increased to a certain extent, the scattered waves by the bubble occurs dispersion phenomenon, emitting broadband noise. It may be the reason why a broadband noise will be produced by the cavitation of bubbles.

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Application of periodic structure scattering in Kelvin ship wakes detection

Cited by 6 publications

References 29 publications

Study on the Composite Scattering Characteristics of Ship Target on the Sea Surface with Its Wake

Study on the Composite Scattering Characteristics of Ship Target on the Sea Surface with Its Wake

Study on Doppler Spectra of Electromagnetic Scattering of Time-Varying Kelvin Wake on Sea Surface

The Nonlinear Scattering Characteristics of Sound Waves by a Bubble

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