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在不考虑地磁场和碰撞的条件下,利用基于费尔马原理的射线微分方程,采用直线几何近似和变步长技术相结合的快速算法实现了电离层短波射线追踪,达到了保证精度的同时提高运算效率的目的。引入亚大模型和附加扰动影响的准抛物模型描述电离层电子浓度剖面,验证快速算法的准确性和高效性。仿真结果表明,快速算法能够适应各种复杂的电离层电子浓度剖面,在保证精度的同时更迅速地计算射线的传播轨迹。
Under the condition of not considering the geomagnetic field and the collision, the ray differential equation based on the Fermat principle was used to realize the short-wave ionospheric ray tracking by using the fast algorithm which combines the linear geometric approximation and the variable-step technique, and at the same time the accuracy was guaranteed Improve the efficiency of computing purposes. The subparagraph model and the quasi-parabolic model with the influence of additional perturbation are introduced to describe the ionospheric electron concentration profile to verify the accuracy and efficiency of the fast algorithm. The simulation results show that the fast algorithm can adapt to all kinds of complex ionospheric electron concentration profiles and calculate the ray propagation path more quickly while ensuring accuracy.