CAJ | 학술논문

以雨团形式出现的海洋降雨能够被合成孔径雷达(SAR)成像,影响SAR图像的正确解译.对海洋降雨的SAR回波信号进行分析和仿真,有助于解释雨团在SAR图像中的成像机理,并为降雨参数(如雨率)的定量化反演提供参考.从海面的后向散射理论出发,详细讨论雨团在SAR图像中的成像机理.基于此机理,并借助于雨团模型,对C、X波段各种极化下雨团的有效归一化雷达后向散射截面积(ENRCS)进行仿真.文中的分析和仿真全面地揭示了海洋雨团SAR回波在不同波段不同极化下的特点,有助于SAR图像的正确解译和降雨定量化研究工作的开展.
이우단형식출현적해양강우능구피합성공경뢰체(SAR)성상,영향SAR도상적정학해역.대해양강우적SAR회파신호진행분석화방진,유조우해석우단재SAR도상중적성상궤리,병위강우삼수(여우솔)적정양화반연제공삼고.종해면적후향산사이론출발,상세토론우단재SAR도상중적성상궤리.기우차궤리,병차조우우단모형,대C、X파단각충겁화하우단적유효귀일화뢰체후향산사절면적(ENRCS)진행방진.문중적분석화방진전면지게시료해양우단SAR회파재불동파단불동겁화하적특점,유조우SAR도상적정학해역화강우정양화연구공작적개전.
Rainfall in the form of rain cells over the ocean can be imaged by synthetic aperture radar (SAR), which affects the interpretation of SAR images. The analysis and simulations of SAR echo signal of rainfall over the ocean contribute to the understanding of the imaging mechanism of rain cells in SAR image and provide a reference for the quantitative investigation. From the theory of backscattering of the ocean surface, we discuss the imaging mechanism of rain cells in SAR image in detail and simulate the effective normalized radar cross section (ENRCS) of SAR echo of rain cells on the C and X band with multi-polarization based on the mechanism with the model of rain cells. The analysis and simulations reveal the characteristics of SAR echo of rain cells over the ocean on different bands and polarizations roundly, which contributes to the correct interpretation of SAR images and quantitative investigation of rainfall