Knowledge Management System Of Institute of Oceanology, Chinese Academy of Sciences
| The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval | |
Liu Shubo1,2 ; Wei Enbo3,4,5; Jin Xu1; Lv Ailing1,2; Dang Hongxing1
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| 2019-10-01 | |
| Source Publication | JOURNAL OF OCEAN UNIVERSITY OF CHINA
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| ISSN | 1672-5182 |
| Volume | 18Issue:5Pages:1051-1060 |
| Corresponding Author | Liu Shubo(liushubo163@163.com) ; Wei Enbo(ebwei@qdio.ac.cn) |
| Abstract | The wind retrieval performance of HY-2A scanning scatterometer operating at Ku-band in HH and VV polarizations has been well evaluated in the wind speed range of 0-25 ms(-1). In order to obtain more accurate ocean wind field, a potential extension of dual-frequency (C-band and Ku-band) polarimetric measurements is investigated for both low and very high wind speeds, from 5 to 45ms(-1). Based on the geophysical model functions of C-band and Ku-band, the simulation results show that the polarimetric measurements of Ku-band can improve the wind vector retrieval over the entire scatterometer swath, especially in nadir area, with the wind direction root-mean-square error (RMSE) less than 12 degrees in the wind speed range of 5-25 m s(-1). Furthermore, the results also show that C-band cross-polarization plays a very important role in improving the wind speed retrieval, with the wind speed retrieval accuracy better than 2 ms(-1) for all wind conditions (0-45 ms(-1)). For extreme winds, the C-band HH backscatter coefficients modeled by CMOD5.N(H) and the ocean co-polarization ratio model at large incidence are used to retrieve sea surface wind vector. This result reveals that there is a big decrease of wind direction retrieval RMSE for extreme wind fields, and the retrieved result of C-band HH polarization is nearly the same as that of C-band VV polarization for low-to-high wind speed (5-25 ms(-1)). Thus, to improve the wind retrieval for all wind conditions, the dual-frequency polarimetric scatterometer with C-band and Ku-band horizontal polarization in inner beam, and C-band horizontal and Ku-band vertical polarization in outer beam, can be used to measure ocean winds. This study will contribute to the wind retrieval with merged satellites data and the future spaceborne scatterometer. |
| Keyword | dual-frequency polarimetric scatterometer wind vector retrieval |
| DOI | 10.1007/s11802-019-4018-z |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2016YFC1401006] ; National Natural Science Foundation of China[51279186] ; National Natural Science Foundation of China[51479183] ; National Natural Science Foundation of China[41676169] ; National Program on Key Basic Research Project[2011CB013704] ; 111 Project[B14028] ; Marine and Fishery Information Center Project of Jiangsu Province[SJC2014110338] |
| WOS Research Area | Oceanography |
| WOS Subject | Oceanography |
| WOS ID | WOS:000482849800006 |
| Publisher | OCEAN UNIV CHINA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/162856 |
| Collection | 中国科学院海洋研究所 |
| Corresponding Author | Liu Shubo; Wei Enbo |
| Affiliation | 1.China Acad Space Technol, Xian Inst Space Radio Technol, Xian 710100, Shaanxi, Peoples R China 2.Natl Key Lab Sci & Technol Space Microwave, Xian 710100, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Shandong, Peoples R China |
| Corresponding Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Liu Shubo,Wei Enbo,Jin Xu,et al. The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2019,18(5):1051-1060. |
| APA | Liu Shubo,Wei Enbo,Jin Xu,Lv Ailing,&Dang Hongxing.(2019).The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval.JOURNAL OF OCEAN UNIVERSITY OF CHINA,18(5),1051-1060. |
| MLA | Liu Shubo,et al."The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval".JOURNAL OF OCEAN UNIVERSITY OF CHINA 18.5(2019):1051-1060. |
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