雨介质中简单目标的相干散射场

Coherent scattering fields of simple targets in rain medium

利用叠加原理 ,导出了离散雨介质中相干散射场与目标散射场的具体表达式 ,数值计算了雨介质中相干散射场与降雨率的关系 ,计算结果表明 :波的衰减不仅与降雨率 ,频率有关 ,而且还与雨区的大小 ,目标尺寸及观察点有关 ;

In this paper, the analytical expression of the coherent scattering fields and the target′s scattering fields is presented respectively on the circumstance that target lies in the discrete rain medium. The coherent scattering field varying versus rain rate is numerical computed. The results show that the attenuation induced by rainfall not only relative to rain rate and operating frequency, but also to the sizes of rain area and target, position of observing point. The attenuation per kilometer of scattering field for a target is smaller than that of total filed.