星载全极化微波辐射计海面风向反演仿真研究

被引：3

作者：

张勇 ^{[1
,2
,3
]}

吕达仁 ^{[1
]}

机构：

[1] 中国科学院大气物理研究所中层大气和全球环境探测重点实验室

[2] 中国科学院大学

[3] 北京市应用气象研究所

来源：

遥感技术与应用 | 2014年 / 03期

关键词：

全极化; 微波辐射计; 海面风向反演; 仿真;

D O I：

暂无

中图分类号：

P714.2 []; P716.3 [];

学科分类号：

0706 ; 070601 ;

摘要：

全极化微波辐射计是一种可以测量海面辐射全部4个Stokes参数的新型被动遥感仪器,是测量海面风场、尤其是海面风向的新手段。介绍了国际首台全极化微波辐射计WindSat的海面风向信号谐波特征,在分析风向反演180°模糊度现象的成因基础之上,提出了利用WindSat能够进行前—后向双视扫描的优势去除风向反演180°模糊度问题的思路;通过构建海面风场仿真场景,在WindSat模拟亮温数据中加入高斯白噪声后,使用最大似然估计法和中值滤波技术开展了海面风向反演。比较和分析了使用WindSat前向刈幅和WindSat前—后向刈幅观测数据的风向反演结果。结果表明:由于能够有效去除风向反演180°模糊度,使用前—后向刈幅观测数据的风向反演精度要明显优于仅仅使用前向刈幅的反演结果。

引用

页码：386 / 393

页数：8

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