Simulation and analysis of fully polarimetric microwave bistatic scattering from an anisotropic ocean surface

Ma Yiping; Du Yanlei; Ma Wentao; Yang Xiaofeng; Zhu Xiaohui; Liu Guihong; Yu Yang; Li Ziwei

doi:10.3969/j.issn.0253-4193.2019.03.015

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Ma Yiping, Du Yanlei, Ma Wentao, Yang Xiaofeng, Zhu Xiaohui, Liu Guihong, Yu Yang, Li Ziwei. Simulation and analysis of fully polarimetric microwave bistatic scattering from an anisotropic ocean surface[J]. Haiyang Xuebao, 2019, 41(3): 155-168. doi: 10.3969/j.issn.0253-4193.2019.03.015

Citation:

Ma Yiping, Du Yanlei, Ma Wentao, Yang Xiaofeng, Zhu Xiaohui, Liu Guihong, Yu Yang, Li Ziwei. Simulation and analysis of fully polarimetric microwave bistatic scattering from an anisotropic ocean surface[J]. Haiyang Xuebao, 2019, 41(3): 155-168. doi: 10.3969/j.issn.0253-4193.2019.03.015

Citation:

Ma Yiping, Du Yanlei, Ma Wentao, Yang Xiaofeng, Zhu Xiaohui, Liu Guihong, Yu Yang, Li Ziwei. Simulation and analysis of fully polarimetric microwave bistatic scattering from an anisotropic ocean surface[J]. Haiyang Xuebao, 2019, 41(3): 155-168. doi: 10.3969/j.issn.0253-4193.2019.03.015

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Simulation and analysis of fully polarimetric microwave bistatic scattering from an anisotropic ocean surface

doi: 10.3969/j.issn.0253-4193.2019.03.015

1.
State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
3.
State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;The Key Laboratory for Earth Observation of Hainan Province, Sanya 572029, China

Received Date: 2018-01-26
Rev Recd Date: 2018-05-15

Abstract

Abstract

In order to explore the possibilities of ocean geophysical parameter retrievals with bistatic scattering signals, thorough understanding of ocean bistatic scattering, both its spatial feature and sensitivity to geophysical parameters, will be crucial and meaningful. In this study, the integral equation model (IEM) combined with an improved directional sea spectrum are adopted to simulate the fully polarimetric microwave bistatic scattering from an anisotropic ocean surface. By comparing the simulation results with satellite observations, the geophysical model function CMOD5 and the simulations of Small Slope Approximation (SSA), the practicability of proposed method in simulating ocean surface microwave scattering is validated. Furthermore, the sensitivities of sea surface bistatic scattering to several geometric and physical parameters, i.e., microwave frequency, incidence, polarization, wind speed and direction, are investigated with this method. The simulation results indicate that ocean surface bistatic scatterings show different spatial scattering characteristics under different observation geometry, and have various sensitivities to ocean dynamic parameters, namely, wind speed and wind direction. Specifically, L-band bistatic scatterings in the backward directions are more sensitive to sea surface wind speed, and the co-polarized ones have opposite responses to wind direction changes for low and high wind speed. At low wind speeds, L-band ocean surface bistatic scatterings have higher sensitivities to wind direction. It is also found that the bistatic scattering contains more spatial information than the conventional monostatic scattering. This work expands the understanding of ocean surface scattering in fully bistatic configuration and explore the potential of parameter retrieval with bistatic radar observations.
- sea surface microwave scattering,
- IEM model,
- wave spectrum,
- bistatic scattering,
- full polarization,
- anisotropy

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References(30)

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