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http://dx.doi.org/10.3744/SNAK.2006.43.3.384

Numerical Analysis on the Effect of Long-crested Wave to the RCS of Marine Target  

Kim, Kook-Hyun (Special Ship Design Team, Hanjin Heavy Industries and Constructions Co. Ltd.)
Cho, Dae-Seung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Kim, Jin-Hyeong (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Lee, Jeong-Kwan (Special Ship Design Team, Hanjin Heavy Industries and Constructions Co. Ltd.)
Publication Information
Journal of the Society of Naval Architects of Korea / v.43, no.3, 2006 , pp. 384-391 More about this Journal
Abstract
RCS effects of long-crested wave surfaces to marine targets are numerically analyzed using a 4-path model and a direct analysis method, developed based on physical optics and a combined method of physical optics/geometric optics, respectively. Reflectivity of long-crested wave surfaces is described with 'Fresnel reflection coefficients' The MPM(modified Pierson-Moskowitz) ocean spectrum is adopted to simulate long-crested waves in the direct analysis method. A numerical analysis of a benchmark model assures the validity of both methods. The direct analysis method is applied to the RCS calculation of electromagnetically large marine targets, which are vertically oriented or slanted to the long crested wave surfaces randomly generated with various significant wave heights. The long-crested wave surface much highly increases the RCS of the marine target, but those effects are decreased as the significant wave height grows up. At low elevation angle, the vertical model has entirely high RCS comparing slanted model, and the RCS of vertical flat plate is the highest on the calm sea surface, while those of slanted flat plates are the lowest on the calm sea surface. The RCS of marine targets on continuously-varying sea surface is more coherent at lower elevation angles, as well.
Keywords
Radar cross section(RCS); Long-crested wave; Marine target; Four-path model; Direct analysis method;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 김국현, 김진형, 조대승, 2005, '복합구조물의 RCS 저감을 위한 효율적 산란중심 해석에 관한 연구,' 대한조선학회 논문집, 제 42권, 제 4호, pp. 421-426   과학기술학회마을   DOI
2 김국현, 조대승, 김종철, 2005, '수중표적에 대한 고주파수 음향산란 해석,' 대한조선학회 논문집, 제 42권, 제 5호, pp. 528-533   과학기술학회마을   DOI
3 조대승, 성상경, 김진형, 최재호, 박일권, 2003, '적응 삼각형 빔 방법에 의한 실내음장 해석,' 한국소음진동공학회 논문집, 제 13권, 제 3호, pp. 217-224
4 Anastassiu, H. T., 2002, 'Radar Cross Section of a Perfectly Conducting, Flat, Polygonal Plate over Dielectric, Lossy Half Space: a Closed Form, Physical Optics Expresstion,' Proceedings of IX-th International Conference on Mathematical Methods in Electromagnetic Theory, pp. 505-507
5 Burkholder, R. J., Janpugdee, P., and Colak, D., 2001, Development of Computational Tools for Predicting the Radar Scattering from Targets on a Rough Sea Surface, The Ohio State Univ., ElectroScience Laboratory, Final Report 735231-3
6 Fossen, T. I., 1994, Guidance and Control of Ocean Vehicles, John Wiley & Sons, p 66
7 Klement, D., Preissner, J., and Stein V., 1988, 'Special Problems in Applying the Physical Optics Method for Backscatter Computation of Complicated Objects,' IEEE Trans. Ant. Prop., Vol. 36, No.2, pp. 228-237   DOI   ScienceOn
8 Lohrmann, D. R., 2001, Radar Cross Sections of Distributed Targets Low over Water in the Presence of Multipath Reflections, Naval Research Laboratory, NRL/FR/5747--01-10006
9 김국현, 김진형, 조대승, 2005, 'Object Precision 방법을 이용한 복합 구조물의 RCS 해석,' 대한조선학회 논문집, 제 42권, 제 2호, pp. 159-164   과학기술학회마을   DOI