theperformanceofdualfrequencypolarimetricscatterometerinseasurfacewindretrieval
文献类型：期刊论文
| 作者 | Liu Shubo2 ; Wei Enbo1; Jin Xu2; Lv Ailing2; Dang Hongxing2
|
| 刊名 | journalofoceanuniversityofchina
 |
| 出版日期 | 2019 |
| 卷号 | 18期号:5页码:1051 |
| ISSN号 | 1672-5182 |
| 英文摘要 | 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 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. |
| 语种 | 英语 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/163202]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.中国科学院海洋研究所 2.Xi'an Institute of Space Radio Technology,China Academy of Space Technology |
| 推荐引用方式 GB/T 7714 | Liu Shubo,Wei Enbo,Jin Xu,et al. theperformanceofdualfrequencypolarimetricscatterometerinseasurfacewindretrieval[J]. journalofoceanuniversityofchina,2019,18(5):1051. |
| APA | Liu Shubo,Wei Enbo,Jin Xu,Lv Ailing,&Dang Hongxing.(2019).theperformanceofdualfrequencypolarimetricscatterometerinseasurfacewindretrieval.journalofoceanuniversityofchina,18(5),1051. |
| MLA | Liu Shubo,et al."theperformanceofdualfrequencypolarimetricscatterometerinseasurfacewindretrieval".journalofoceanuniversityofchina 18.5(2019):1051. |
入库方式： OAI收割
来源：海洋研究所
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