摘要
大气波导能够改变电磁波的正常传播特性,因而得到学界极大关注。当前大气波导研究中所用蒸发波导模型缺乏RSHMU模型的预测性能分析,文中对RSHMU模型的预测方法进行了深入研究。更正了文献中给出的温度剖面稳定度函数表达式,利用正确的剖面稳定度函数,获得了该模型在不同风速以及不同相对湿度条件下的敏感性分析结果。与渤海梯度塔实测数据对比分析表明:该模型预测蒸发波导高度的平均误差为-2.2 m,均方根误差为4.5 m;预测强度的平均误差为1.1 M单位,均方根误差为2.0 M单位。不稳定条件下该模型的高度预测性能优于美国海军研究生院提出的NPS模型,而强度预测性能上二者相当。
Atmospheric duct can change the normal propagation characteristics of electromagnetic wave,so it has been paid great attention by the academia.In response of the lack of the RSHMU model′s prediction performance analysis in current evaporation duct models,this model for evaporation duct prediction method is studied deeply.And the expression of temperature profile stability function given in the literature is corrected.The sensitivity analysis results of this model are obtained under different wind speed and different relative humidity conditions using the corrected profile stability function.Compared with the measured data of a gradient tower in Bohai sea,it is shown that the height average error is-2.2 m and the root-mean-square error is 4.5 m;the strength average error is 1.1 M unit and the root-mean-square error is 2.0 M unit.The height prediction performance of this model in the unstable condition is better than that of the NPS model proposed by USA Navy Postgraduate School and the strength prediction performance is roughly the same between the two models.
作者
张利军
郭相明
李建儒
ZHANG Li-jun;GUO Xiang-ming;LI Jian-ru(China Research Institute of Radio Wave Propagation,Qingdao 266107,China)
出处
《微波学报》
CSCD
北大核心
2021年第4期58-63,共6页
Journal of Microwaves
