研究目的
To simulate and analyze backscattering of a time-harmonic X-band signal from evolving ocean-like surfaces in the 2D space, evaluating the scattered field using direct numerical solution and approximate models, and to investigate the Doppler spectra's centroid and width parameters.
研究成果
The paper provides high-quality data from direct numerical simulations that can serve as a benchmark for other scattering formulations. It also offers meticulous assessment of the approximate scattering models in their ability to predict Doppler properties of the sea backscatter.
研究不足
The technique is limited to the 2-D space, but is relevant in rather commonly occurring three-dimensional geometries, even though only co-polarized returns can be evaluated.
1：Experimental Design and Method Selection:
The study involves generating and propagating individual realizations of sea-like surfaces, with the evolution represented with a series of 'frozen' profiles. The field backscattered by each such profile is then evaluated, resulting in a sampled time-varying received signal that contains the Doppler information.
2：Sample Selection and Data Sources:
An ensemble of 3000 time-varying realizations is amassed for Monte Carlo studies.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
The procedure involves generating a surface as a realization of a zero-mean Gaussian random process, evolving it by adjusting the phases of its harmonics, and applying the Creamer transformation to introduce wave-wave interactions.
5：Data Analysis Methods:
The average Doppler spectrum is estimated from the realizations, and the spectral parameters (centroid and width) are analyzed.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
