斜向探测电离图描迹提取算法研究

电离层斜向探测工作在高频段,密集的外部干扰如短波通信,广播电台以及大气噪声等污染了接收数据,严重影响斜向探测电离图描迹的提取.针对上述问题,本文提出了一种提取斜向探测电离图描迹的算法.该算法由频域去干扰,有序统计量OS-CFAR检测,去虚警点三个步骤构成.对实测数据的处理结果表明这种方法的有效性和实用性.

Algorithm Study of Trace Extraction from Oblique Ionogram

Oblique sounding of ionosphere works in high frequency band. The external dense interfer- ences in the HF band, such as shortwave communication, broadcast, air noise and so on, contaminate the received data, affect the trace extraction from oblique ionogram. Aiming at these problems above, a method of trace extraction from oblique ionogram is proposed. The method is composed of three steps. Firstly, it suppresses interference in frequency domain, and then it extracts signal by OS-CFAR method, finally it removes false signal by digital image process method. The method is applied to the measured da- ta, and results show that the proposed method is efficient and practical.