| 一种适用于小入射角条件下的白冠海面后向散射模型 |
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| 引用本文： | 曲晓俊,李晨,戴永寿.一种适用于小入射角条件下的白冠海面后向散射模型[J].海洋科学,2021,45(5):2-8. |
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| 作者姓名： | 曲晓俊 李晨 戴永寿 |
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| 作者单位： | 中国石油大学（华东）,中国石油大学（华东）,中国石油大学（华东） |
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| 基金项目： | 国家重点研发计划项目（2017YFC1405600）；中央高校基本科研业务费专项资金资助（17CX02079） |
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| 摘 要： | 本文提出了一种白冠海面的小入射角星载雷达后向散射模型，模型包括海面非波浪破碎部分和波浪破碎部分的后向散射。在风的作用下，海浪破碎形成白冠，对星载雷达的后向散射信号造成影响。文中利用TRMM PR和ECMWF的时空匹配数据集，拟合得出小入射角下星载雷达海面波浪破碎部分的后向散射模型，并分别与高斯分布/非高斯的海浪斜率分布海面的准镜面散射模型组成了白冠海面小入射角星载雷达后向散射模型。经实测数据对比，本文提出的由非高斯准镜面散射和考虑波浪破碎组合模型有效。
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| 关 键 词： | 白冠海面 半经验方法 小入射角 后向散射模型 |
| 收稿时间： | 2020/11/7 0:00:00 |
| 修稿时间： | 2020/12/24 0:00:00 |
Whitecap sea surface backscattering model for low incidence angles |
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| QU Xiao-jun,LI Chen,DAI Yong-shou.Whitecap sea surface backscattering model for low incidence angles[J].Marine Sciences,2021,45(5):2-8. |
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| Authors: | QU Xiao-jun LI Chen DAI Yong-shou |
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| Institution: | China University of Petroleum(East China),China University of Petroleum(East China),China University of Petroleum(East China) |
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| Abstract: | In this paper, a spaceborne radar backscattering model of the whitecap sea surface under low incidence angles is presented, which includes the backscatters of the non-wave breaking region and the wave breaking region of the sea surface. Under the action of the wind, the broken waves form whitecaps, which affect the backscattering signal of the spaceborne radar. Based on the space-time collocating data sets of TRMM PR and ECMWF, the backscattering model of the sea surface wave breaking region of spaceborne radar under low incidence angles is fitted. The whitecap sea surface spaceborne radar backscattering model is formed by comparing it with the quasi-specular scattering model under the condition of Gaussian / non-Gaussian probability density distribution of sea surface slopes at low incidence angles. By comparing with the measured data, The combined model of non-Gaussian quasi-specular scattering and wave breaking proposed in this paper is effective. |
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| Keywords: | whitecap sea surface semi-empirical method low incidence angles backscattering models |
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