海面掠入射散射特性及布儒斯特效应研究

发布时间：2018-03-18 10:35

本文选题：掠入射　切入点：镜面反射　出处：《微波学报》2017年03期 　论文类型：期刊论文

【摘要】：海面掠入射散射特性对海洋遥感等问题有着重要应用,海面对雷达波束的镜面反射对海上超低空目标与海面的耦合场有着重要影响,利用海面的布儒斯特效应将有效削弱镜面反射。以西太平洋和东南沿海盐度场与温度场的卫星数据为基础,根据双Debye方程建立修正海水介电模型计算不同海域介电常数;基于Elfouhaily海谱模型,采用修正双尺度模型并考虑不同风速及频率下的截断波数,仿真分析了风速、频率、海水温度与盐度等因素对海面掠入射散射特性及布儒斯特效应的影响,总结归纳了海面布儒斯特效应产生机理和变化规律。分析表明:风速、频率及海水温度均会对海面布儒斯特效应产生影响。该研究为海洋环境的遥感探测及海上超低空目标的监测与跟踪提供了理论支撑。
[Abstract]:The scattering characteristics of grazing incident sea surface have important applications in ocean remote sensing, and the mirror reflection of radar beam on the sea surface has an important influence on the coupling field between the very low altitude target and the sea surface. Based on the satellite data of salinity field and temperature field in the western Pacific Ocean and the southeast coast, the dielectric constant of different sea areas is calculated by using the modified seawater dielectric model based on the double Debye equation. Based on the Elfouhaily sea spectrum model, the effects of wind speed, frequency, sea water temperature and salinity on the scattering characteristics and the Brewster effect of sea surface are simulated and analyzed by using the modified two-scale model and considering the truncated wavenumber at different wind speeds and frequencies. The formation mechanism and variation law of the Brewster effect on the sea surface are summarized. The analysis shows that the wind speed, The frequency and sea temperature will affect the Brewster effect on the sea surface. This study provides a theoretical support for the remote sensing detection of marine environment and the monitoring and tracking of very low altitude targets at sea.
【作者单位】：空军工程大学防空反导学院;
【基金】：国家自然科学基金(61372033)
【分类号】：TN011

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