Fast hybrid method for analyzing the Doppler spectral of a moving plasma-coated target above a time-evolving lossy dielectric sea surface

A fast hybrid method that combines the reciprocity theorem with high frequency approximation algorithm is proposed to analyze the Doppler spectral from a two-dimensional moving plasma-coated object above a one-dimensional time-evolving lossy dielectric sea rough surface. This hybrid method eliminates the need for numerical solution of the polarization currents on object and time-evolving sea surface, thereby saving the computer resources and greatly improving the computing speed when compared to the conventional numerical methods. The characteristics of Doppler spectrum from a plasma-coated object above a time-evolving sea surface are analyzed in detail.