基于二维解析射线追踪的短波电离层轨迹研究

Research of Shortwave Trace Based on the 2-Dimensional Analytic Ray-Tracing in the Ionosphere

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。

The situation that the short wave reflects in the ionosphere via single F layer is considered, a specific ionosphere electron-density distribution (quasi-parabolic) model is given. And the two-dimensional analysis ray-tracing method is adopted to derive the analysis expression describing the path parameter of the hf sky wave propagation trajectories. On the basis of the analysis expression, both the situation that the frequency is fixed while the elevation angle of the rays are changed at one time and the s...