天波返回散射特殊电离图的处理方法

Algorithm for Processing Sky Wave Backscatter Special Ionogram

基于特殊状态的返回散射扫频电离图,提出一种用于提取电离层主模式区域MUF曲线分布的算法,为选频提供数据支撑。首先,计算出各个信道上的背景噪声,并根据背景噪声的分布特性,统计得出各个信道的补偿因子,结合补偿因子与背景噪声及空域滤波技术进行噪声消除,获得干净数据;然后,在干净数据的基础上,采用距离分段式均值处理的方法,对电离层特征参数MUF进行提取;最后,经过历史数据测试显示,算法结果与电离层的主模式区域边界分布符合度较好。该算法过程简单,实时性较好。

In this paper, an algorithm is proposed to calculate the leading edge in the ionosperic primary mode region based on the backscatter ionogram at particular time. First the algorithm calculates the background noise of each channel , according to the distribution characteristics of the background noise the compensation factors of each channel are calculated . To eliminate the noise using compensation factor and background noise and spatial filtering technology . The ionospheric feature parameters are extracted by means of mean distance processing based on clean data. The result show that the algorithm can extract the main mode region boundary distribution well, and meet the real time requirement of the engineering.