The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval
文献类型：CNKI期刊论文
| 作者 | LIU Shubo ; WEI Enbo; JIN Xu; LV Ailing; DANG Hongxing
|
| 发表日期 | 2019-10-06 |
| 出处 | Journal of Ocean University of China
 |
| 关键词 | dual-frequency polarimetric scatterometer wind vector retrieval |
| 英文摘要 | The wind retrieval performance of HY-2 A scanning scatterometer operating at Ku-band in HH and VV polarizations has been well evaluated in the wind speed range of 0–25 m s-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 45 m s-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? 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 m s-1 for all wind conditions(0–45 m s-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 m s-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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Key R&D Program of China (No. 2016YFC1401006) ; the National Natural Science Foundation of China (Nos. 51279186, 51479183 and 41676169) ; the National Program on Key Basic Research Project (No. 2011CB013704) ; the 111 Project (No. B14028) ; the Marine and Fishery Information Center Project of Jiangsu Province (No. SJC2014 110338) |
| 卷 | v.18期:05页:51-60 |
| 语种 | 英文; |
| 分类号 | P716.3 |
| ISSN号 | 1672-5182 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188445]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.NationalKeyLaboratoryofScienceandTechnologyonSpaceMicrowave 2.InstituteofOceanologyandCenterforOceanMega-Science,ChineseAcademyofSciences,andQingdaoNationalLaboratoryforMarineScienceandTechnology 3.Xi'anInstituteofSpaceRadioTechnology,ChinaAcademyofSpaceTechnology |
| 推荐引用方式 GB/T 7714 | LIU Shubo,WEI Enbo,JIN Xu,et al. The Performance of Dual-Frequency Polarimetric Scatterometer in Sea Surface Wind Retrieval. 2019. |
入库方式： OAI收割
来源：海洋研究所
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