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首页> 外文会议>IEEE International Geoscience and Remote Sensing Symposium >Normalized Radar Cross Sections of Sea Surface Estimated using Asymptotic and Semi-Empirical Methods Inc Band
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Normalized Radar Cross Sections of Sea Surface Estimated using Asymptotic and Semi-Empirical Methods Inc Band

机译：使用渐近和半经验方法估计的海面归一化雷达横截面

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摘要

C band microwave radars have been widely used in ocean observations, e.g. oil spill monitoring, ship detection, wind speed retrieval, etc. All these applications rely on the measured normalized radar cross section (NRCS) of sea surface. Therefore, it is necessary to develop accurate models to predict the radar cross sections of sea surface. In this paper, based on the six commonly used sea spectra models, i.e. Elfouhaily, Hwang, Romeiser, Apel, Fung and Pierson spectra, the normalized radar cross sections are calculated by Small Perturbation Method (SPM), Two Scale Model (TSM) and the first order Small Slope Approximation (SSA-1), respectively. Meanwhile, to better evaluate the accuracy of different sea spectra, comparisons between numerical calculations and the empirical CMOD5 model are made for various incident angles, wind speeds, and wind directions. The comparisons show that the normalized radar cross sections calculated based on Romeiser spectrum agree better with CMOD5 in some specific cases. The works presented in this paper will be helpful for applications of C band microwave radars in ocean observations.
机译：C频段微波雷达已广泛用于海洋观测中，例如，漏油监测，船舶检测，风速检索等所有这些应用依赖于海面测量的标准化雷达横截面（NRC）。因此，有必要开发准确的模型来预测海面的雷达横截面。本文基于六种常用的海谱型号，即elfouhaily，hwang，罗马，罗马，凤梨和pierson光谱，归一化雷达横截面通过小扰动方法（spm），两个比例模型（tsm）计算。第一阶小斜率近似（SSA-1）。同时，为了更好地评估不同海谱的准确性，对数值计算与经验CMOD5模型之间的比较是针对各种入射角，风速和风向进行的。比较表明，基于罗马谱计算的标准化雷达横截面在一些特定情况下，CMOD5比CMOD5更好地达到更好。本文提出的作品将有助于C带微波雷达在海洋观测中的应用。

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