Sea surface wind directions retrieval method based on footprints of rain cells on SAR images

Ye Xiaomin; Lin Mingsen; Liang Chao; Zou Yarong; Yuan Xinzhe

doi:10.3969/j.issn.0253-4193.2018.04.004

Volume 40 Issue 4

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Article Navigation > Haiyang Xuebao > 2018 > 40(4): 41-50

Ye Xiaomin, Lin Mingsen, Liang Chao, Zou Yarong, Yuan Xinzhe. Sea surface wind directions retrieval method based on footprints of rain cells on SAR images[J]. Haiyang Xuebao, 2018, 40(4): 41-50. doi: 10.3969/j.issn.0253-4193.2018.04.004

Citation:

Ye Xiaomin, Lin Mingsen, Liang Chao, Zou Yarong, Yuan Xinzhe. Sea surface wind directions retrieval method based on footprints of rain cells on SAR images[J]. Haiyang Xuebao, 2018, 40(4): 41-50. doi: 10.3969/j.issn.0253-4193.2018.04.004

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Sea surface wind directions retrieval method based on footprints of rain cells on SAR images

doi: 10.3969/j.issn.0253-4193.2018.04.004

1.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China
2.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China;Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, China

Received Date: 2017-04-13
Rev Recd Date: 2017-12-12

Abstract

Abstract

Wind directions are necessary to sea surface wind speed retrieval from SAR image by Geophysical Model Function (GMF). In this paper, a method of sea wind directions retrieval from SAR images by using the feature of footprints of rain cells on SAR image with brighter in downwind direction and darker in upwind direction is applied on sea surface wind retrieval. The root mean square errors (RMSE) of wind directions retrieved from 4 case studied RADARSAT-2 SAR images compared with wind directions of ASCAT are all less than 16 degrees. The wind speed retrieval results from these 4 SAR images by using GMF of CMOD5 with wind directions retrieved from rain cells are nearly the same as that with wind directions of ASCAT scatterometer, the differences of RMSEs are no more than 0.3 m/s. The method of wind directions retrieval from the feature of rain cell footprints on SAR image developed in this paper can be applied in SAR wind speeds retrieval.
- rain cells,
- SAR,
- wind directions,
- sea surface wind speed retrieval

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References

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