The simulation of the SAR image of a ship wake

Tunaley, J. K. E.; Buller, E.H.; Wu, K.H.; Rey, María Teresa de Tena

doi:10.1109/36.103305

Cited by 57 publications

(41 citation statements)

References 12 publications

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“…Since narrow-V wakes come from Bragg scattering, the angle between the turbulent wake and narrow V-wakes decreases when the wavelength decreases [10]. In detail, in L-band images, narrow-V wakes appear within a half-angle from the turbulent direction ranging from 1.5 • to 4 • , whereas in X-band images [10,26], they appear as bright edges of the turbulent wake. For sake of clarity, it is worth noting that in Reference [10] only the former ones are called narrow-V wakes, whereas the latter ones are considered as components of a turbulent system.…”

Section: Ship Wake Visibility In Sar Imagesmentioning

confidence: 97%

Performance Analysis of Ship Wake Detection on Sentinel-1 SAR Images

2017

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Abstract:A novel technique for ship wake detection has been recently proposed and applied on X-band Synthetic Aperture Radar images provided by COSMO/SkyMed and TerraSAR-X. The approach shows that the vast majority of wake features are correctly detected and validated in critical situations. In this paper, the algorithm was applied to 28 wakes imaged by Sentinel-1 mission with different polarizations and incidence angles with the aim of testing the method's robustness with reference to radar frequency and resolution. The detection process is properly modified. The results show that the features were correctly classified in 78.5% of cases, whereas false confirmations occur mainly on Kelvin cusps. Finally, the results were compared with the algorithm performance on X-band images, showing that no significant difference arises. In fact, the total false confirmations rate was 15.8% on X-band images and 18.5% on C-band images. Moreover, since the main criticality concerns again the false confirmation of Kelvin cusps, the same empirical criterion suggested for the X-band SAR images yielded a negligible 1.5% of false detection rate.

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Section: Ship Wake Visibility In Sar Imagesmentioning

confidence: 97%

Performance Analysis of Ship Wake Detection on Sentinel-1 SAR Images

2017

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“…Since the formulation of fluid dynamic theory was firstly concluded mathematically by Lord Kelvin, there have been a lot of scholars to do researches focusing on the Kelvin wakes [7][8][9][10][11][12][13][14][15]. Based on the Bragg mechanism of sea surface, Tunaley et al [7] researched the SAR imaging of ship wakes in L-band and analyzed its validity through a comparison with the SeaSAT SAR imagery.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the Bragg mechanism of sea surface, Tunaley et al [7] researched the SAR imaging of ship wakes in L-band and analyzed its validity through a comparison with the SeaSAT SAR imagery. Oumansour et al [8] investigated the SAR imaging of ship wakes in X-and L-band utilizing the small perturbation scattering model.…”

Section: Introductionmentioning

confidence: 99%

Application of Facet Scattering Model in Sar Imaging of Sea Surface Waves With Kelvin Wake

Wang¹,

Min²,

Chen³

et al. 2016

PIER B

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Abstract-The principal purpose of this work is the simulation of the ship wake in Synthetic Aperture Radar (SAR) imaging based on a facet scattering model. The hydrodynamic model of the surface waves mainly considers the Kelvin wake waves and the wind driven waves. For the prediction of radar returns from the composite surface, the semi-deterministic facet scattering model (SDFSM) is proposed, which is verified to have good performance through a comparison with the experiment by SASS-II. Then, the distributions of backscattering normalized radar cross section (NRCS) of facets are investigated for both V V and HH polarizations and characteristics of the wake pattern are shown with good visibility. On the basis of these, an application of velocity bunching (VB) imaging model is presented in detail for the simulation of SAR imaging of sea surface waves with Kelvin wake. Finally, several numerical results provide states of the effects of ship speed, wind speed and the ship sailing direction on the characteristics of Kelvin wake in SAR images. Thus, this simulation may enable us to provide a theoretical basis to the detection of ship wakes.

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“…Ship wakes are often observed in SAR images of ocean surface obtained from spaceborne or airborne platforms (Munk et al 1987, Lyden et al 1988, Shemdin 1990, Tunaley et al 1991. There are various ship wake patterns that are visible on Downloaded by [Arizona State University] at 10:32 03 November 2014 ( I ) these images.…”

Section: Introductionmentioning

confidence: 95%

Simulation of ship wakes image by an along-track interferometric SAR

Shemer

Kagan

Zilman

1996

International Journal of Remote Sensing

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A mathematical model that allows simulations of the image of waves in ship wakes by either regular or interferometric airborne Synthetic Aperture Radar (SAR or INSAR) is described. The three-component velocity field induced at the ocean surface by a moving ship serves as the input to the model. The simulations take into account the effect of temporal variations of the wave field in the wake on the INSAR imaging by the velocity bunching mechanism. The model also accounts for the scanning distortion of the image. The developed algorithm allows study of the visibility of the ship wave wake by a regular SAR or by lNSAR for arbitrary imaging parameters, as well as for different ship sizes and ship velocity vectors relative to the platform flight track. Various patterns of ship wake images obtained by numerical simulations are presented.

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The simulation of the SAR image of a ship wake

Cited by 57 publications

References 12 publications

Performance Analysis of Ship Wake Detection on Sentinel-1 SAR Images

Performance Analysis of Ship Wake Detection on Sentinel-1 SAR Images

Application of Facet Scattering Model in Sar Imaging of Sea Surface Waves With Kelvin Wake

Simulation of ship wakes image by an along-track interferometric SAR

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