SUITABLE WIND DIRECTION FOR SEA SURFACE WIND SPEED RETRIEVAL USING SYNTHETIC APERTURE RADAR

• OHKUBO Ryoya

  株式会社ユーラスエナジーホールディングス 技術部（元東京海洋大学）

• TAKEYAMA Yuko

  東京海洋大学 学術研究院 海洋資源エネルギー学部門

• IKEYA Tsuyoshi

  東京海洋大学 学術研究院 海洋資源エネルギー学部門

• OHSAWA Teruo

  神戸大学 大学院海事科学研究科

Bibliographic Information

Other Title

• 合成開口レーダを用いた海上風推定に適した風向情報

Abstract

 Coastal wind speeds retrieved from Sentinel-1 synthetic aperture radar (SAR) with four types of wind directions (in situ, Japan Meteorological Agency mesoscale analysis (MANAL), Sentinel-1 Level 2 Ocean (OCN) product and extracted wind streaks from SAR images with 2D FFT) are compared to clarify a suitable wind direction. The result shows that in situ, MANAL and OCN wind directions can retrieve SAR wind speeds with a root mean square error (RMSE) of around 25% though the variation width of biases with the MANAL wind direction is slightly large. It is also found that the mean absolute error of the SAR wind direction extracted by 2D FFT is larger than the others especially when the wind speed is low. The error of wind direction is one of the reasons for a large RMSE (30.5%) of the SAR wind speed. It is concluded that the in-situ wind direction is the most reliable, but the OCN and the MANAL wind directions can also be used for the SAR wind speed retrieval.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 77 (2), I_1117-I_1122, 2021

  Japan Society of Civil Engineers

Keywords

• synthetic aperture radar
• Sentinel-1
• remote sensing
• wind speed retrieval
• coastal wind

Details

• CRID: 1390289940733808768
• NII Article ID: 130008113302
• DOI: 10.2208/kaigan.77.2_i_1117
• ISSN: 18838944
• ISSN: 18842399
• Web Site: https://www.jstage.jst.go.jp/article/kaigan/77/2/77_I_1117/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed