粗糙海面蒸发波导传播和近掠入射散射分析

摘要

讨论在蒸发波导条件下粗糙海面对电波传播特性的影响。推导粗糙海面的表面反射系数,通过实验检验某粗糙海面电波传播预测模型在我国海域的适用性,并给出实验结果和分析。给出了不同条件下波导高度和传播损耗、最大探测距离间的关系。数据分析表明：冬季的粗糙海面情况下模型计算的传播损耗值与实测值比较接近,而秋季时两者相差较大,说明在海况较好时该模型适用于我国近海海域,而当风浪较大时,将导致表面粗糙度增大,影响模型的精度,使其低估传播损耗。%The effect of rough sea surface on the electromagnetic wave under the condition of evaporation duct is discussed.The modified reflect coefficient of rough surface is analyzed,and the quantitative analysis based on experimental data is done to validate the electromagnetic wave forecast model in the Chinese sea.Experiment results show the relation among the duct altitude,loss and the range.Results of model computation and observed data are in good consistency.It is indicated that the electromagnetic wave forecast model is applicable in Chinese sea when the ocean wave is weak.When the wind on the sea is stronger,the rough surface could influence the model and underestimate the propagation loss.