%0 Journal Article
%T Theoretical Study on Microwave Scattering Mechanisms of Sea Surfaces Covered With and Without Oil Film for Incidence Angle Smaller Than 30°
%+ Equipe PIM (Lab-STICC_PIM)
%+ École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)
%A Zheng, Honglei
%A Zhang, Jie
%A Zhang, Yanmin
%A Khenchaf, Ali
%A Wang, Yunhua
%Z National Key Research and Development Program : 2017YFC1405600National Natural Science Foundation of China (NSFC) : 41576170
%< avec comité de lecture
%@ 0196-2892
%J IEEE Transactions on Geoscience and Remote Sensing
%I Institute of Electrical and Electronics Engineers
%V 59
%N 1
%P 37-46
%8 2021-01
%D 2021
%R 10.1109/TGRS.2020.2993861
%K Oil spills
%K Ocean remote sensing
%K Sea surface
%K Surface waves
%K Microwave scattering
%K Kirchhoff approximation
%K Small-slope approximation
%Z Computer Science [cs]/Signal and Image Processing
%Z Sciences of the Universe [physics]/Ocean, AtmosphereJournal articles
%X This article is devoted to investigating the microwave scattering mechanisms of oil-free and oil-covered sea surfaces for an incidence angle smaller than 30° in a backscattering configuration. The Elfouhaily spectrum is used to simulate an oil-free sea surface, whereas the Elfouhaily spectrum combined with the Jenkins damping model is applied to the simulation of an oil-covered sea surface. Then, the Kirchhoff approximation-stationary phase approximation (KA-SP) and the first order of small-slope approximation (SSA-1) are employed to simulate the scattering coefficients induced by specular scattering and total scattering, respectively. Importantly, a new parameter defined as specular scattering to total scattering ratio (STR) is proposed in this article, which can be used to measure the ratio of specular backscattered power to total backscattered power. The dependencies of the scattering coefficient and the STR on incidence angles, wind speeds, wind directions, oil thicknesses, and so on, are investigated. This article provides new insights for a better understanding of the evolution of microwave scattering mechanisms from oil-free and oil-covered sea surfaces in the transition region of incidence angles (from about 15° to 30°).
%G English
%L hal-03126988
%U https://hal-ensta-bretagne.archives-ouvertes.fr/hal-03126988
%~ UNIV-BREST
%~ INSTITUT-TELECOM
%~ ENSTA-BRETAGNE
%~ CNRS
%~ UNIV-UBS
%~ ENSTA-BRETAGNE-STIC
%~ GIP-BE
%~ ENIB
%~ LAB-STICC
%~ INSTITUTS-TELECOM
%~ LAB-STICC_PIM
%~ LAB-STICC_SYPH