Radar Backscattering Coefficient Calculation Based on Spectrum Function of Sea Surface Elevation
基于粗糙海面高度频谱函数的雷达后向散射系数计算

Backscattering coefficients play on important role in active microwave remote sensing applications in oceanography. In general, the backscattering coefficients can be calculated from scatter models. But the results are different from the choice of ocean wave spectra that there exist some different forms under some similar wind conditions. Additionally, the models are due to the Gussian distribution of sea surface elevation, which exists only within very low wind condition. Thus model predictions are not faithful reproductions of radar cross section very often. The paper presents a method to calculate the backscattering coefficients with the use of two dimensional spectrum function of sea surface elevation with the prediction of non Gaussian distribution of the elevation and slope of wave surface. Th method does not use a single wave spectrum. The results are comparable with SIR C/X SAR data of South China sea.