返回散射电离图传播模式的自动识别方法

提出了返回散射电离图传播模式的自动识别方法.介绍的方法仅基于返回散射电离图本身，结合电离层传播机理，无须人工干预，自动识别出一幅返回散射电离图存在哪几个反射层(E层、Es层和F层)的回波，根据层数采用不同的算法提取各个层的回波前沿.最后，又提出了利用垂测和斜测电离图辅助判读返回散射电离图的方法，能够提高返回散射电离图模式识别和前沿提取的正确率，具有较好的应用前景.

Methods for auto-identification of propagation modes from backscatter ionograms

Methods for auto-identification of propagation modes from backscatter ionograms are presented. The method first introduced is only based on a backscatter ionogram not requiring other sounding data. Through the mechanism of ionospheric propagation, the method can auto-identify what reflection layers (E layer, Es layer and F layer) exist in a backscatter ionogram without manual operation. And the leading edges for all existed layers are extracted with different algorithms. Finally, an interpretation method for a backscatter ionogram with the assistance of a vertical ionogram and an oblique ionogram is put forward. The method can improve the precision of mode identification and leading edge extraction in a backscatter ionogram and has a good prospect for application.