研究目的
To determine the bistatic radar cross section of a ship target under the geometrical optics approximation for ship detection applications in GNSS-R systems.
研究成果
The study successfully demonstrates a procedure for determining the bistatic RCS of a ship target under the GO approximation, highlighting the impact of acquisition geometry and polarization. It shows that for a large range of ship orientations, the backscattering acquisition geometry is the most favorable configuration for ship detection in bistatic systems like GNSS-R.
研究不足
The study is limited by the approximations used (GO and KA), which may not capture all scattering phenomena accurately. The model's applicability is restricted to scenarios where these approximations are valid.
1：Experimental Design and Method Selection:
The study employs the geometrical optics (GO) approximation for modeling the bistatic radar cross section (RCS) of ships in maritime scenarios. The Kirchhoff Approximation (KA) is used for simplifying the scattering problem.
2：Sample Selection and Data Sources:
The ship is modeled as a smooth dielectric parallelepiped lying over a rough sea surface. Sea surface roughness is described via a 2-D Gaussian-Gaussian stochastic process.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the paper.
4：Experimental Procedures and Operational Workflow:
The study involves calculating the scattered electric field under KA-GO, evaluating the scattering matrix, and performing numerical integration over the sea surface using Monte Carlo simulation.
5：Data Analysis Methods:
The bistatic RCS is evaluated by combining the results of the scattering matrix and surface integral calculations, with shading effects from the ship target accounted for.
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