Journal
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Volume 16, Issue 10, Pages 1511-1515Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2019.2902418
Keywords
Chinese Gaofen-3 (GF-3) satellite; RADARSAT-2; sea surface wind; synthetic aperture radar (SAR); typhoon
Categories
Funding
- National Natural Science Foundation of China [41876211, 41506206, 41876204, 41476152]
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Synthetic aperture radar (SAR) is widely used to detect sea surface wind. It has been found that the signals of co-polarization SAR tend to become saturated under high wind-speed conditions. Also, low signal-to-noise ratios of cross-polarization SAR have been observed under low wind-speed conditions. In this letter, a typhoon wind-field retrieval method is developed by compositing the wind speeds retrieved from dual-polarized SAR images. This letter then applies the proposed method to eight typhoons (four from the Canadian RADARSAT-2 satellite and four from the Chinese Gaofen-3 satellite). The results show that the method is successful in regard to fine typhoon wind structure retrieval, with a root-mean-square error of wind direction of 12 degrees and a wind speed of 1.7 m/s, against 12 oceanic buoy measurements in the South China Sea.
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