电波科学学报2025，Vol.40Issue(2)：313-322,10.DOI:10.12265/j.cjors.2024054
双尺度电磁散射计算的截断波数和海谱研究
Cutoff wavenumber and spectrum for electromagnetic scattering computation with two-scale method
摘要
Abstract
The two-scale model(TSM)is widely used for electromagnetic scattering simulation of randomly rough sea surfaces.The geometric roughness spectrum and truncation wavenumber are two key factors directly affecting the accuracy of TSM simulation.Taking the geophysical model function(GMF)developed with the observation data as a reference,these two key factors are quantitatively studied in this paper.The empirical function of the truncation wavenumber model is fitted with the regression methods.The simulation results show that the Apel spectrum is more suitable for simulating the backscattering of rough sea surface in C,X,and Ku bands,and the simulation error with the proposed empirical function of truncation wavenumber under different conditions are all less than 1 dB.Comparative analysis with existing truncated wavenumber models shows that the proposed truncation wavenumber model can effectively calculate the Bragg scattering contribution from the roughness spectrum,and the model function has a wider applicable band and observation angle.关键词
粗糙海面散射/双尺度模型/截断波数/粗糙度谱/地球物理模型函数Key words
rough sea scattering/two-scale model/cutoff wavenumber/roughness spectrum/geophysical model function分类
信息技术与安全科学引用本文复制引用
郭晨宇,叶红霞..双尺度电磁散射计算的截断波数和海谱研究[J].电波科学学报,2025,40(2):313-322,10.基金项目
国家重点研发计划(2021YFB3900401) （2021YFB3900401）
