Doppler spectra of electromagnetic wave scattered from an object flying above time-varying nonlinear sea surfaces. Issue 16 (2nd November 2019)

• Record Type: Journal Article
• Authors: Yang, Peng-Ju; Wu, Rui; Ren, Xin-Cheng; Zhang, Yu-Qiang; Zhao, Ye
• Is Part Of: Journal of electromagnetic waves and applications. Volume 33:Issue 16(2019)
• Page Start: 2175
• Page End: 2198
• Publication Date: 2019-11-02
• Subjects: Doppler spectrum -- electromagnetic scattering -- nonlinear sea surface -- hybrid method -- method of moments (MoM) -- Kirchhoff approximation (KA); Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2019.1674191
• Languages: English
• ISSNs: 0920-5071

Abstract

ABSTRACT: Doppler spectra of electromagnetic wave scattered from an object flying above time-varying nonlinear sea surfaces are investigated by utilizing a hybrid algorithm combining method of moments (MoM) and Kirchhoff approximation (KA). The "choppy wave" model is employed for describing nonlinear hydrodynamic interactions between ocean waves. Doppler spectra of scattered wave are simulated and analyzed for different incidence angles, target velocities, target heights, sea states as well as sea surface models, and an obvious broadening of Doppler spectrum is observed due to the coupling scattering between the flying target and rough sea surfaces. In comparison with the normalized radar cross section, Doppler spectra of scattered wave have the advantage of extracting information regarding target flying above dynamic sea surfaces. This study is of great value for the analysis of coupling scattering between flying target and rough sea surface as well as for the detection low-flying target in sea clutter environment.