摘要
本文对比分析了利用ITU半经验模型和3种电子碰撞模型预测天波链路电离层吸收衰减的方法.利用中国参考电离层模型和质谱仪非相干散射大气模型构建背景电离层和背景大气,在构建的背景环境中利用三维射线追踪方法仿真分析由半经验模型和3种电子碰撞模型计算得到的电离层吸收衰减与电波频率、出射仰角、大圆距离的关系.并进行了大圆距离100 km、200 km、400 km的短波通信测试试验,分析了各预测方法的准确度.从试验结果来看:日间两类模型性能差异不大,而日落期利用电子碰撞模型预测得到的电离层吸收衰减优于以往采用的ITU半经验模型;在可用频段的较大频率处,实测值更接近电子碰撞模型.仿真与试验均证实3种电子碰撞模型预测值相近,根据实际可获得大气中性成分数据.
This paper compares and analyzes the methods of using the ITU semi-empirical model and three electron impact models to predict the ionospheric absorption attenuation of the skywave links. The international reference ionosphere model and the mass spectrometer incoherent scattering atmosphere model are used to construct the background ionosphere and background atmosphere. In the constructed background environment, using the threedimensional ray tracing method to simulate and analyze the relationship between the ionospheric absorption attenuation and the radio frequency, the elevation angle, and the great circle distance calculated by the semi-empirical model and the three electron impact models. Shortwave communication test experiments with the great circle distances of 100 km,200 km, and 400 km are conducted, and the accuracy of each prediction method is analyzed. According to the test results, there is little difference in the performance of the two models during the day. But during sunset, the ionospheric absorption attenuation predicted by the electron impact model is better than the ITU semi-empirical model used in the past. At the larger frequency of the available frequency band, the actual measurement values are closer to the electron collision model. Simulations and experiments have confirmed that the predicted values of the three electron collision models are similar. According to the actual data, the neutral composition of the atmosphere can be obtained.
作者
王严
李雪
尹文禄
蔚娜
娄鹏
WANG Yan;LI Xue;YIN Wenlu;WEI Na;LOU Peng(China Research Institute of Radiowave Propagation,Qingdao 266107,China;State Key Laboratory on Blind Signal Processing,Chengdu 610041,China)
出处
《电波科学学报》
CSCD
北大核心
2022年第1期129-136,共8页
Chinese Journal of Radio Science
基金
国家自然科学基金(62031014,62031015,61831010)。
关键词
吸收衰减
电子碰撞
短波
射线追踪
电离层
absorption attenuation
electron collision
shortwave
ray tracing
ionosphere
