| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Doppler Shifts of Backscattering Fields from One Dimensional Linear and Nonlinear Oceanic Surface by SSA-II |
| WANG Yun-Hua1, ZHANG Yan-Min2, GUO Li-Xin3
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1Ocean Remote Sensing Institute, Ocean University of China, Qingdao 266003
2Department of Physics, Ocean University of China, Qingdao 266100
3School of Science, Xidian University, Xi'an 710071
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| Cite this article: |
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WANG Yun-Hua, ZHANG Yan-Min, GUO Li-Xin 2010 Chin. Phys. Lett. 27 104101 |
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Abstract Based on the general framework of the second order small slope approximation (SSA-II), Doppler shifts of backscattered fields from linear and nonlinear hydrodynamic sea surfaces are predicted. Comparisons are performed at incidence angles varying from near-nadir to moderate-grazing for different radar frequencies. The predicted Doppler shifts for nonlinear hydrodynamic model are somewhat larger than the results corresponding to linear surface. Meanwhile, the dependences of the Doppler shifts on the wind speed and radar polarizations are also analyzed, and the comparisons are shown to confirm the sensitivities to the polarization and wind speed. At the same time, the results of the small perturbation method (SPM) and geometrical optics approximation (GO) are also presented for comparisons.
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| Keywords:
41.20.-q
42.25.Bs
42.25.Dd
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Received: 05 February 2010
Published: 26 September 2010
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| PACS: |
41.20.-q
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(Applied classical electromagnetism)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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42.25.Dd
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(Wave propagation in random media)
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