基于粒子群优化的斜测电离图反演研究

Inversion of Oblique Ionogram for Ionospheric Parameters Based on Particle Swarm Optimization

斜向探测是电离层探测的主要方式之一,它能获得电波传播群时延和频率关系的电离图。斜测电离图包含了探测距离上电离层状态的有用信息,可以通过对这种电离图的反演提取电离层的状态信息。采用粒子群算法对斜测电离图进行了反演,取得了良好的效果。结果证明,该方法能够克服线性求解的不稳定性,获得较好的反演结果,展示了在处理实际斜向探测电离图的应用前景。

The oblique sounding is one of the powerful tools in ionospere sounding,by which an oblique ionogram is obtained with the group path or time delay against operating frequency. The Oblique ionogram contains useful information regarding the state of the ionosphere over the range of the signals traverse, which can be inverted to obtain the useful state information about the ionosphere. Good result and its perspective for application are presented by using the algorithm of particle swarm optimization. The results demonstrate that the stability of the method presented by Rao is improved to some extent,and a better inversion result is obtained,showing the perspective of this method in inverting the actual oblique ionogram.