摘要
通过全波解反射系数和波模振幅递归算法,文中分析了平面波在水平电离层分层结构中的能流分布规律,结合电离层化学反应模型对电离层参量的扰动情况进行仿真,并与其他文献中使用的方法相比.全波计算方法考虑到了各层反射、透射波相互叠加的情况,仿真结果对比发现,用全波法得到的能流吸收和电子温度扰动幅度更大.不同入射波参数、地磁场参数、电离层背景参量下的扰动情况对比发现:改变电波入射角会使电离层中电波的反射吸收高度发生变化;改变方位角和地磁倾角仅影响电离层能流吸收幅度,不会对电波反射高度造成影响;改变中性成分的浓度和温度会影响电离层的能量损失和化学反应过程.
Because of the good reflection of the ionosphere to the VLF wave,the heating model suitable for the high frequency band is not fully applicable in the VLF band.In this paper,the energy distribution law of the plane wave in the horizontal ionosphere layered structure is analyzed by the recursive algorithm of the full wave reflection coefficient and the wave mode amplitude.Combined with the ionosphere chemical reaction model,the energy distribution of the VLF wave in the ionosphere is analyzed.Compared with the methods used in other literatures,the full wave method takes into account the superposition of reflection and transmission waves of each layer.The simulation results show that the energy flow absorption and electronic temperature disturbance amplitude obtained by the full wave method are larger.The ionosphere disturbance under different incidence angle,azimuth angle and geomagnetic angle are compared,and it is found that changing the incident angle of the radio wave will change the reflection and absorption height of the radio wave in the ionosphere;while changing the azimuth angle and the geomagnetic inclination will only affect the absorption amplitude of the energy flow in the ionosphere,and will not affect the reflection height of the radio wave.
作者
孙佳欣
彭怀云
李清亮
SUN Jiaxin;PENG Huaiyun;LI Qingliang(National Key Laboratory of Electronmagnetic Environment,China Research Institute of Radiowave Propagation,Qingdao 266107,China)
出处
《电波科学学报》
CSCD
北大核心
2021年第4期619-629,共11页
Chinese Journal of Radio Science
关键词
电离层扰动
甚低频
电子温度
电子浓度
全波法
ionosphericdisturbance
VLF
electron temperature
electron concentration
full wave method
