SAR imaging simulation of ship-generated internal wave wake in stratified ocean
| Autor: | Zhaohui Cai, Jia-Kun Wang, Jun-Long Chen, Min Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Synthetic aperture radar
010504 meteorology & atmospheric sciences business.industry Wave propagation Acoustics 0211 other engineering and technologies Polarimetry General Physics and Astronomy 02 engineering and technology Internal wave Wake 01 natural sciences Electronic Optical and Magnetic Materials Optics Surface wave Wind wave Velocity potential Physics::Accelerator Physics Electrical and Electronic Engineering business Physics::Atmospheric and Oceanic Physics Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Electromagnetic Waves and Applications. 31:1101-1114 |
| ISSN: | 1569-3937 0920-5071 |
| DOI: | 10.1080/09205071.2017.1337527 |
| Popis: | Simulation of synthetic aperture radar (SAR) imaging of ship-generated internal wave wake in stratified ocean is conducted through the combination of scattering and modulation effects under the background of wind waves. With the derived surface velocity of internal wave wake from the velocity potential, a reconstruction of the wave elevation is implemented by means of the frequency decomposition technique. Based on the hydrodynamic model, the facet scattering model is presented for the fully polarimetric backscattering and the velocity bunching imaging model is applied to the SAR image simulation of surface waves with an embedded internal wave wake. Numerical simulations show that the wave patterns of internal wave wake, which modulates the distribution of Bragg waves on sea surface, are closely dependent on ship speed. And the conditions are classified for a good visibility of internal wave wake in SAR image. Besides, the great agreement with measurement strongly verifies the validity of the simu... |
| Databáze: | OpenAIRE |
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