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• W3147702910 endingPage "4088" @default.
• W3147702910 startingPage "4074" @default.
• W3147702910 abstract "In this study, an energy spectrum (ES) algorithm is proposed to retrieve wind direction from <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>X</i> -band marine radar image sequences. This algorithm is based on utilizing the occlusion area zero-pixel percentage to distinguish rain-free and rain-contaminated radar data. And then the rain-contaminated images are detected and discarded. The effect of radar radial attenuation in radar image sequences is modified by the piecewise fitting technique. Wind direction is determined from rain-free and radial correction data, based on the ES of small-scale wind streaks. The ES of small-scale wind streaks is obtained by establishing an ES scale separation filter. Based on the wind streak characteristics, a 2-D fast Fourier transform is used to obtain the ES of radar images. The wind streak characteristics are derived from the distribution of the azimuth normalization radar cross section. The proposed algorithm is tested using data collected from <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>X</i> -band radar images and <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>in situ</i> anemometer data from the coast of the East China Sea. Compared with the anemometer data, after using the proposed algorithm, the root-mean-square difference for wind direction is 12.13°, which is an acceptable result for engineering application." @default.
• W3147702910 created "2021-04-13" @default.
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• W3147702910 date "2021-01-01" @default.
• W3147702910 modified "2023-10-14" @default.
• W3147702910 title "An Energy Spectrum Algorithm for Wind Direction Retrieval From <i>X</i>-Band Marine Radar Image Sequences" @default.
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• W3147702910 doi "https://doi.org/10.1109/jstars.2021.3069989" @default.
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