کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8065669 1520694 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of nearshore sea surface wind vector from marine X-band radar images
ترجمه فارسی عنوان
تعیین بردار بادی دریایی در دریای خزر از تصاویر رادار باند دریایی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
چکیده انگلیسی
A new algorithm is proposed to retrieve sea surface wind speed and wind direction from marine X-band radar images measured in the nearshore region. To remove the influence of ships, a preprocessing method is proposed to identify them from gray-level radar image sequence. To retrieve wind speed under different sea states, the probability distribution function of gray levels and significant wave height are used to develop a wind speed model. The azimuthal dependence of gray levels is used to retrieve wind direction, with a deviation added to adjust the influence of land. The root mean square error (RMSE) between the wind speeds measured by anemometer and retrieved from marine X-band radar image sequences is 1.37 m/s for wind speed of 0-20 m/s, and the RMSE of wind direction between them is 26.2° for wind speed of 5-20 m/s, which show that the proposed method is reasonable. The influences of sea states and ships to the algorithm are also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 96, 1 March 2015, Pages 79-85
نویسندگان
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