Calculating the electromagnetic scattering of ocean surface by physical optics and CUDA

2012 ◽  
Author(s):  
Xiang Su ◽  
Zhen-sen Wu ◽  
Jia-ji Wu
Keyword(s):  
Electromagnetic Scattering ◽  
Ocean Surface ◽  
Physical Optics

scholarly journals Rearch on Electromagnetic Scattering from ocean covered by foams

2018 ◽  
Vol 173 ◽  
pp. 03082
Author(s):  
GAO Qian ◽  
YUE Hongwei ◽  
WANG Zhenxin ◽  
JI Yajun ◽  
LI Ximin
Keyword(s):  
Wind Speed ◽  
Radiative Transfer ◽  
Temperature Difference ◽  
Electromagnetic Scattering ◽  
Mie Theory ◽  
Ocean Surface ◽  
Scale Model ◽  
First Order ◽  
Scattering Coefficients ◽  
Back Scattering

Back scattering of ocean surface is investigated by considering the foams coverage on its surface. Firstly, by adopting modified two-scale mode and the vector radiative transfer theory, zero and first order scattering coefficients are obtained by solving VRT equations. Then, MIE theory is used to get the scattering from foams, and fraction of foams coverage is analyzed by changing parameters of wind speed and temperature difference of ocean-air. Finally, the modified two-scale model and algorithms are verified by comparing its results with measured results, and simulations of calculating back scattering from ocean surface with and without foams are carried out. The conclusion is obtained that wind speed has different influence on back scattering under different incident angles.

scholarly journals Comparison of Three Different Styles of Submarine Sails on Electromagnetic Scattering under the Detection of Airborne Radar

2018 ◽  
Vol 17 ◽  
pp. 02003
Author(s):  
Ji Liu ◽  
Peilin Huang ◽  
Yaodong Zhao ◽  
Jinzu Ji ◽  
Fengli Xue
Keyword(s):  
Cross Section ◽  
Electromagnetic Scattering ◽  
Pitch Angle ◽  
Elevation Angle ◽  
3D Models ◽  
Radar Cross Section ◽  
Physical Optics ◽  
Airborne Radar ◽  
Range Analysis ◽  
Radar Antenna

This paper studies radar cross section of submarine sails on the water. Under the detection of the enemy’s airborne radar, considering the motion of the submarine, the sail model of radar pitch angle incidence range analysis is established. By using CATIA software, the 3D models of AKULA sail, SUBOFF sail and VICTOR sail are built. On the basis of the physical optics method and the equivalent currents method, the scattering characteristics of sails RCS(radar cross section) are simulated under X radar band. Through the microwave anechoic chamber test, this paper verifies the accuracy of the combination of the physical optics method and the equivalent electromagnetic flow method. The influence of the distance from the airborne radar to the sail on the pitch angle of the electromagnetic wave is discussed, with the elevation angle of the radar antenna varies. Then, we illustrate the characteristics of circumferential direction RCS of the sail under different pitch angles. Finally, the mean RCS of the sail at a given pitch angle is simulated. The results show that the AKULA sail is considerably superior to SUBOFF sail and VICTOR sail on stealth performance with the pitch angle less than 4° . But when the pitch angle exceeds 10°, the SUBOFF sail can be given priority.

Application of physical optics to ocean surface radar scattering with CUDA

2013 ◽  
Author(s):  
Long-xiang Ling-Hu ◽  
Zhen-sen Wu ◽  
Xing Guo
Keyword(s):  
Ocean Surface ◽  
Physical Optics ◽  
Radar Scattering
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