Abstract
A hybrid method combining the method of moment (MoM) and physical optical (PO) is used to compute the scattering from 3D conductive target above a rough sea surface in this paper. Firstly, the composite model of 3D conductive target above the sea surface is constructed. The rough sea surface is simulated by the Pierson-Moscowitz spectrum and Monte-Caro method. The target is divided into MoM region and the rough sea surface is divided into PO region. Then, the current on the facet of target is obtained by MoM method and the current on the facet of rough surface is obtained by PO approximation. Compared to the method of moment, the hybrid MoM-PO method proves to be high accurate and efficient. Finally, composite scattering under different condition are studied in detained.
Highlights
The composite scattering from the target above the rough surface has been widely used in radar detection、ground remote sensing, et al[1][2]
The comparison results of the MoM method and the MoM-physical optical (PO) hybrid method for scattering from a cubic above a rough surface is shown in figure 2
A hybrid method combining the method of moment (MoM) and physical optic (PO) is proposed to solve the composite scattering from a 3D conductive target above a sea surface
Summary
The composite scattering from the target above the rough surface has been widely used in radar detection、ground remote sensing, et al[1][2]. The fast multiple method (FMM) [3] and the forward and backward iterative algorithm [4] is of high accuracy for computing the composite scattering. The reciprocity theorem method combining the Kirchhoff approximation is of high efficiency for computing the composite scattering [5]. The method of moment combining the Kirchhoff approximation (MoM-KA) is used to calculate the composite scattering from a 2D conductive target above a 1D rough surface by R Wang [6], which is of high accuracy and efficiency. A MoM-PO hybrid method is used to calculate the scattering from the 3D conductive target above a rough sea surface. Compared to the traditional MoM, this hybrid method is accurate and efficient
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