| 用小波分析反演星载SAR图像海面风向 |
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| 引用本文： | 张雷,石汉青,杜华栋,陈宪,杜海龙.用小波分析反演星载SAR图像海面风向[J].遥感学报,2014,18(1):215-230. |
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| 作者姓名： | 张雷 石汉青 杜华栋 陈宪 杜海龙 |
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| 作者单位： | 国家海洋局 第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012;国家海洋局 第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012;国家海洋局 第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012;国家海洋局 第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012;国家海洋局 第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江 杭州 310012 |
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| 基金项目： | 国家高技术研究发展计划（863计划）（编号：2013AA091205）；载人航天工程项目；国家海洋局青年海洋科学基金（编号：2013445）；国家海洋局第二海洋研究所基本科研业务费专项资助项目（编号：JG1215） |
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| 摘 要： | 为更好地利用合成孔径雷达SAR图像本身的风条纹信息来反演高精度的海面风向,采用不同模式、不同极化方式的星载ASAR图像,基于抽样小波变换结合快速傅里叶变换的方法反演海面风向,同时将该方法反演的结果与传统的傅里叶变换法和改进的局部梯度法反演的结果进行了对比。结果表明,抽样小波变换应用于海面风向的反演是可行的,反演的风向精度优于传统的傅里叶变换法和改进的局部梯度法。ASAR不同模式、不同极化方式的数据反演结果存在着一定的差异。
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| 关 键 词： | 合成孔径雷达SAR 海面风向 小波变换 小波分析 |
| 收稿时间： | 3/5/2013 12:00:00 AM |
| 修稿时间： | 8/6/2013 12:00:00 AM |
Validation and calibration of significant wave height from HY-2 satellite altimeter |
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| ZHANG Lei,SHI Hanqing,DU Huadong,CHEN Xian and DU Hailong.Validation and calibration of significant wave height from HY-2 satellite altimeter[J].Journal of Remote Sensing,2014,18(1):215-230. |
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| Authors: | ZHANG Lei SHI Hanqing DU Huadong CHEN Xian and DU Hailong |
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| Institution: | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China |
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| Abstract: | The HY-2, which was launched on August 16, 2011, is the first microwave marine remote sensing satellite developed by China. In this paper, the data of Significant Wave Height (SWH) measured by satellite altimeter HY-2 were compared with the data observed by satellite altimeter Jason-1and Jason-2 as well as the data measured by buoys. It was found that there was a systematic error of 0.3-0.4 m between SWH obtained from HY-2 and other altimeters and buoys. The comparison indicated that there was a linear relationship between the data of HY-2 and buoys, which could be used to calibrate SWH measured by HY-2 to better reflect the real marine situation. Comparisons show that the results are good and HY-2 altimetry data work well with other satellite altimetry data. |
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| Keywords: | HY-2 satellite altimetry Significant Wave Height (SWH) data correction |
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