Abstract
Mapping wind with high-frequency (HF) radar is still a challenge. The existing second-order spectrum based wind speed extraction method has the problems of short detection distances and low angular resolution for broad-beam HF radar. To solve these problems, we turn to the first-order Bragg spectrum power and propose a space recursion method to map surface wind. One month of radar and buoy data are processed to build a wind spreading function model and a first-order spectrum power model describing the relationship between the maximum of first-order spectrum power and wind speed in different sea states. Based on the theoretical propagation attenuation model, the propagation attenuation is calculated approximately by the wind speed in the previous range cell to compensate for the first-order spectrum in the current range-azimuth cell. By using the compensated first-order spectrum, the final wind speed is extracted in each cell. The first-order spectrum and wind spreading function models are tested using one month of buoy data, which illustrates the applicability of the two models. The final wind vector map demonstrates the potential of the method.
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The National Natural Science Foundation of China under contract Nos 61371198 and 62001426.
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Zeng, Y., Zhou, H., Tian, Z. et al. Mapping wind by the first-order Bragg scattering of broad-beam high-frequency radar. Acta Oceanol. Sin. 40, 153–166 (2021). https://doi.org/10.1007/s13131-021-1752-z
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DOI: https://doi.org/10.1007/s13131-021-1752-z