我国渤海域微波雷达海杂波功率对数正态分布模化

对流层波导可以使电磁波在较小的衰减下实现超视距传播，也可能造成雷达盲区，引入干扰，降低雷达、无线电通信系统的性能.因此，海上对流层波导参数的实时探测反演具有重要的意义.利用雷达海杂波反演对流层波导（refractivity from clutter, RFC）是当前国内外研究热点.雷达海杂波作为RFC输入的主要信息，其功率在传播路径上分布的随机特性严重影响反演效果，本文利用2011-06-2011-08和2012-07-2012-11渤海域对流层波导测量数据开展传播路径上雷达海杂波功率分布特性研究，有助于反演.比较测量数据和分布模型的概率密度函数表明，传播路径上的微波雷达海杂波功率不服从雷利分布，而服从对数正态分布.

Log-normal distribution modelling of microwave radar sea clutter power from the Bohai Sea in China

Tropospheric duct could make electromagnetic waves achieve over-the-horizon propagation with lower attenuation and also leads to radar blind areas, accompanies by interference and reduces the performance of radar and radiocommunication systems. Therefore, it is meaningful to probe and retrieve the parameters of the marine tropospheric ducts in real-time. Recently, the inversion of tropospheric ducts from radar clutter becomes a hot spot of research. Radar sea clutter power over propagation path is regarded as the main input information, and its random characteristics greatly affect inversion results. This paper makes some study on the distribution characteristics of radar sea clutter power for the tropospheric duct experiments which are carried out in Bohai Sea during 6-8,2011 and 7-11, 2012 contributing inversion Comparing the probability distribution density of experimental data with distribution models show that the micro wave radar sea clutter power over propagation path does not meet Rayleigh distribution, but log-normal distribution.