Abstract
Ocean wave spectrum and surface currents can be determined from a series of spatial wave images recorded by an X-band marine radar. In the absence of a surface current, the three-dimensional spectral energy found by using the series of images will be confined to a trajectory defined by the still water dispersion relationship. The presence of a surface current will make the three-dimensional spectral energy show a corresponding Doppler shift which may determine the current using the least squares method and obtain the directional wave spectrum. On the basis of conventional wave spectrum and directional function, the paper emulates a series of X-band radar images considering shadowing modulation and simulates numerically the three-dimensional image spectrum both with and without a surface current, calculates the current velocity by virtue of the Doppler shift, and obtains the two-dimensional image spectrum. Finally the paper analyzes measured wave level elevation—a function of time t to obtain one-dimensional image spectrum, and the data comes from an X-band radar in McMaster University.
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References
Hoogeboom H, Rosenthal P W. Directional Wave Spectra in Radar Images[C] //The International Geoscience and Remote Sensing Symposium, IEEE Geosci and Remote Sensing So. Munich: IEEE Press, 1982.
Young I R, Rosenthal W, Ziemer F. Three-Dimensional Analysis of Marine Radar Images for the Determination of Ocean Wave Directionality and Surface Currents [J]. J Geophys Res, 1985, 90(C1): 1049–1059.
Borge J C, Rodriguez G R. Inversion of Marine Radar Images for Surface Wave Analysis[J]. American Meteorological Society, 2004, 21(8): 1291–1300.
Borge J C. Estimation of the Significant Wave Height with X-Band Nautical Radars[R]. St. John’s: Ocean, Offshore and Arctic Engineering (OOAE) Division, 1999.
Stewart R H. Physical Oceanography[M]. Beijing: China Ocean Press, 1992(Ch).
Valenzuela G R. Theories for the Interaction of Electromagnetic and Ocean Waves—A Review[J]. Boundary Layer Meteorolog, 1978, 13: 61–85.
Lee P H Y. X Band Microwave Backscattering from Ocean Waves[J]. Journal of Geophysical Research, 1995, 100(C2): 2591–2611.
Yang Huaiping, Sun Jiaguang.Wave Simulation Based on Ocean Wave Spectrums[J]. Journal of System Simulation, 2002, 14(9): 1175–1178(Ch).
Li Hui, Guo Chen, Li Xiaofang. 3-D Visual Simulation of Irregular Ocean Waves Based on Matlab[J]. Journal of System Simulation, 2003, 15(7): 1057–1059(Ch).
Wen Shengchang, Yu Zhouwen. The Theories and Calculations of Ocean Waves[M]. Beijing: Science Press, 1984 (Ch).
Manolakis G, Ingle K, Kogon M. Statistical and Addaptive Signal Processing[M]. Beijing: Publishing House of Electronics Industry, 2003 (Ch).
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Foundation item: Supported by the National Natural Science Foundation of China (60571065, 40406020)
Biography: WU Xiongbin(1968–), male, Professor, research direction: radio oceanography and radio wave propagation.
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Wu, X., Wu, Y., Cheng, F. et al. Extraction of Sea-state parameters with an X-band radar. Wuhan Univ. J. Nat. Sci. 13, 55–61 (2008). https://doi.org/10.1007/s11859-008-0111-7
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DOI: https://doi.org/10.1007/s11859-008-0111-7