| 基于理论的气旋条件下双极化C波段合成孔径雷达波参数检测 |
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| 引用本文： | 丁莹莹,左军成,邵伟增,史剑,袁新哲,孙建,胡佳臣,李晓峰.基于理论的气旋条件下双极化C波段合成孔径雷达波参数检测[J].海洋学报(英文版),2019,38(5):21-31. |
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| 作者姓名： | 丁莹莹 左军成 邵伟增 史剑 袁新哲 孙建 胡佳臣 李晓峰 |
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| 作者单位： | 浙江海洋大学海洋科技学院, 浙江舟山 316000,浙江海洋大学海洋科技学院, 浙江舟山 316000,浙江海洋大学海洋科技学院, 浙江舟山 316000,国防科技大学气象海洋学院, 南京 21007,自然资源部国家卫星海洋应用服务中心, 北京 100081,中国海洋大学物理海洋学实验室/CIMST, 青岛海洋科学与技术国家实验室, 山东青岛 266100,浙江海洋大学海洋科技学院, 浙江舟山 316000,全球科学和技术, 国家海洋和大气管理局(NOAA)国家环境卫星, 数据和信息服务(NESDIS), College Park, MD 20740, USA |
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| 基金项目： | The National Key Research and Development Program of China under contract No. 2017YFA0604901; the National Natural Science Foundation of China under contract Nos 41806005 and 41776183; the Public Welfare Technical Applied Research Project of Zhejiang Province of China under contract No. LGF19D060003. |
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| 摘 要： | Theoretical-based ocean wave retrieval algorithms are applied by inverting a synthetic aperture radar(SAR)intensity spectrum into a wave spectrum, that has been developed based on a SAR wave mapping mechanism. In our previous studies, it was shown that the wave retrieval algorithm, named the parameterized first-guess spectrum method(PFSM), works for C-band and X-band SAR at low to moderate sea states. In this work, we investigate the performance of the PFSM algorithm when it is applied for dual-polarization c-band sentinel-1(S-1) SAR acquired in extra wide-swath(EW) and interferometric wide-swath(IW) mode under cyclonic conditions.Strong winds are retrieved from six vertical-horizontal(VH) polarization S-1 SAR images using the c-band crosspolarization coupled-parameters ocean(C-3 PO) model and then wave parameters are obtained from the image at the vertical-vertical(VV) polarization channel. significant wave height(SWH) and mean wave period(MWP) are compared with simulations from the WAVEWATCH-III(WW3) model. The validation shows a 0.69 m root mean square error(RMSE) of SWH with a –0.01 m bias and a 0.62 s RMSE of MWP with a –0.17 s bias. Although the PFSM algorithm relies on a good quality SAR spectrum, this study confirms the applicability for wave retrieval from an S-1 SAR image. Moreover, it is found that the retrieved results have less accuracy on the right sector of cyclone eyes where swell directly affects strong wind-sea, while the PFSM algorithm works well on the left and rear sectors of cyclone eyes where the interaction of wind-sea and swell is relatively poor.
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| 关 键 词： | 波浪参数 合成孔径雷达 气旋 |
| 收稿时间： | 2019/2/20 0:00:00 |
Wave parameters retrieval for dual-polarization C-band synthetic aperture radar using a theoretical-based algorithm under cyclonic conditions |
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| DING Yingying,ZUO Juncheng,SHAO Weizeng,SHI Jian,YUAN Xinzhe,SUN Jian,HU Jiachen and LI Xiaofeng.Wave parameters retrieval for dual-polarization C-band synthetic aperture radar using a theoretical-based algorithm under cyclonic conditions[J].Acta Oceanologica Sinica,2019,38(5):21-31. |
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| Authors: | DING Yingying ZUO Juncheng SHAO Weizeng SHI Jian YUAN Xinzhe SUN Jian HU Jiachen and LI Xiaofeng |
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| Abstract: | Theoretical-based ocean wave retrieval algorithms are applied by inverting a synthetic aperture radar (SAR) intensity spectrum into a wave spectrum, that has been developed based on a SAR wave mapping mechanism. In our previous studies, it was shown that the wave retrieval algorithm, named the parameterized first-guess spectrum method (PFSM), works for C-band and X-band SAR at low to moderate sea states. In this work, we investigate the performance of the PFSM algorithm when it is applied for dual-polarization c-band sentinel-1 (S-1) SAR acquired in extra wide-swath (EW) and interferometric wide-swath (IW) mode under cyclonic conditions. Strong winds are retrieved from six vertical-horizontal (VH) polarization S-1 SAR images using the c-band cross-polarization coupled-parameters ocean (C-3PO) model and then wave parameters are obtained from the image at the vertical-vertical (VV) polarization channel. significant wave height (SWH) and mean wave period (MWP) are compared with simulations from the WAVEWATCH-Ⅲ (WW3) model. The validation shows a 0.69 m root mean square error (RMSE) of SWH with a -0.01 m bias and a 0.62 s RMSE of MWP with a -0.17 s bias. Although the PFSM algorithm relies on a good quality SAR spectrum, this study confirms the applicability for wave retrieval from an S-1 SAR image. Moreover, it is found that the retrieved results have less accuracy on the right sector of cyclone eyes where swell directly affects strong wind-sea, while the PFSM algorithm works well on the left and rear sectors of cyclone eyes where the interaction of wind-sea and swell is relatively poor. |
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| Keywords: | wave parameters synthetic aperture radar cyclonic condition |
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