微波雷达对海面温度准确监测仿真

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英文篇名：Simulation of Sea Surface Temperature Accurate Monitoring by Microwave Radar 作者：孙宇 ; 陈标 ; 孙华庆 ; 王丹 英文作者：SUN Yu;CHEN Biao;SUN Hua-qing;WANG Dan;Institute of Remote Sensing, Submarine Academy; 关键词：海面温度 ; 后向散射系数 ; 微扰法 ; 雷达遥感 英文关键词：Sea surface temperature;;Backscattering coefficient;;Perturbation method;;Radar remote sensing 中文刊名：JSJZ 英文刊名：Computer Simulation 机构：海军潜艇学院遥感所; 出版日期：2019-02-15 出版单位：计算机仿真 年：2019 期：v.36 语种：中文; 页：JSJZ201902004 页数：4 CN：02 ISSN：11-3724/TP 分类号：24-27

摘要

辐射计是目前海面温度监测的主要手段,然而有其固有的缺陷,雷达遥感方式能够弥补辐射计的缺陷,是监测海面温度的新思路,雷达遥感海面温度的核心工作就是研究海面温度对后向散射系数的影响。为解决上述问题,基于微扰法、两种海水介电模型和A.K.Fung半经验海谱,建立海面温度影响后向散射系数的正演机制,仿真分析了不同条件下的影响程度,并与风速的影响程度进行比较。仿真结果表明,在低温、垂直极化、高频率、大入射角条件下,海面温度影响更显著,该条件下海面温度对后向散射系数的影响比风速的影响小约一个数量级。可得出结论,适宜条件下,海面温度对后向散射系数有一定影响,为主动微波遥感海面温度提供了基础理论支持。
        Radiometer is currently the main means of sea surface temperature monitoring. However, it has some inherent defects. Radar remote sensing can make up for the defect of radiometer, and it is a new idea to monitor sea surface temperature. The core work is to study the effect of sea surface temperature on the backscattering coefficient. In order to solve the above problems, based on the perturbation method, two seawater dielectric models and A.K.Fung semi-empirical wave spectrum, the forward mechanism of the backscattering coefficient was established considering the influence of temperature. The influence degree under different conditions was analyzed through simulation. And the result was compared with the influence degree of wind speed. The simulation results show that the effect of sea surface temperature is more significant under the condition of low temperature, vertical polarization, high frequency and large incident angle. The influence of sea surface temperature on the backscattering coefficient is about one order of magnitude lower than that of wind speed. It can be concluded that under the appropriate conditions, the sea surface temperature has influence on the backscattering coefficient, which provides the basic theoretical support for the active microwave remote sensing of sea surface temperature.

引文

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