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考虑短波在电离层中通过单F层反射传播的情况,结合一种特定电离层电子浓度分布(准抛物)模型,利用二维解析射线追踪技术得到短波轨迹中参数的解析表达式。在此基础上分别对射线在频率固定、仰角变化及仰角固定、频率变化两种情况下的轨迹进行了讨论,得出频率和仰角对短波传输的地面距离及群路径的关系。最后对不同因子对轨迹的影响及短波轨迹进行了仿真。仿真结果表明,该方法在研究短波电离层传播轨迹中有很好的应用价值。
Considering the propagation of shortwave in the ionosphere through a single F-layer, the analytical expression of the parameters in the shortwave trajectory is obtained by using a two-dimensional analytic ray tracing technique combined with a specific ionospheric electron concentration distribution (quasi-parabolic) model. On this basis, the trajectories of the ray under fixed frequency, elevation change, fixed elevation angle and frequency changes are discussed respectively. The relationship between the frequency and elevation angle on the ground distance and the group path of shortwave transmission is obtained. Finally, the influence of different factors on the trajectory and the shortwave trajectory are simulated. The simulation results show that this method has a good application value in the research of propagation path of short-wave ionosphere.