Abstract
Ocean wave is an important ocean environment parameter.It has significant meaning for harbor construction,navigation and exploitation of oil field.Synthetic Aperture Radar(SAR) is a primary instrument to measure ocean wave in large-scale area.SAR estimates wavelength and direction of propagation quite well,But it is very difficult to provide quantificationally amplitude of ocean wave as well as relation between SAR image intensity and ocean surface.Besides,it is complex to obtain ocean wave spectrum from SAR image spectrum.Along-Track Interferometric Synthetic Aperture Radar(ATI-SAR) is an active coherent imaging system,which has two antennas separated along the platform flight direction.The phrase image of ATI-SAR less depend on real aperture radar modulation transfer function than synthetic aperture radar.Therefore,ATI-SAR is more suitable to measure ocean wave.This paper introduces the imaging mechanism of ocean wave by Along-Track Interferometric Synthetic Aperture Radar,It establish firm foundation to inverse ocean wave directional spectrum further.Finally,we discuss some issues in present study and research orientation in the future.
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