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| Inversion of Wave-number Spectrum from Simulated Bistatic High-frequency Radar Data |
| He Huan①② Ke Heng-yu① Wan Xian-rong① Geng Fang-zhi② |
①(School of Electronic Information, Wuhan University, Wuhan 430079, China)
②(Department of Information Countermeasures, Air Force Radar Academy, Wuhan 430019, China) |
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Abstract Based on the bistatic scattering coefficients deduced from perturbation method and the simulated data of bistatic sea echo spectrum, Howell’s algorithm is adopted to derive the wave-number spectrum and to extract the information of significant wave height and wind speed. In this paper, the applicable condition of Howell’s algorithm is complemented. The selection principle of the retained number of singular values of the kernel matrix is determined. Inversion results show that the inversion errors of significant wave height and wind speed decrease as the wind direction tends to perpendicular. And the inversion errors also decrease as the appropriate operating frequency is selected according to the sea state (i.e. wind speed or significant wave height). If the operating frequency and the retained number of singular values of the kernel matrix are appropriate, the inversion error of significant wave height will be less than 3% and the inversion error of wind speed will be less than 1%.
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Received: 10 March 2011
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Corresponding Authors:
He Huan
E-mail: hhwdp@163.com
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2011, Vol. 33 
