静止轨道瞬态点源多目标闪电信号实时探测技术

Real-time detection technology of instantaneous point-source multi-target lightning signal on the geostationary orbit

闪电是具有代表性的瞬态点源多目标,与雷暴等强对流气象现象有着密切的联系,通过对闪电的观测可获取雷暴雨等强对流天气的分布、变化、定位。文中论述了在静止轨道上利用瞬态点源多目标闪电信号和缓变的云层、陆地与海洋等背景噪声之间存在时间、空间和光谱特性上的差异,采用光谱滤波、空间滤波、帧—帧背景去除三种方法的组合来实现瞬态点源多目标闪电信号的增强与探测的方案及其技术实现,进行了理论分析与试验验证。

Lightning is a typical signal of instantaneous point-source multi-target,it has close connection with severe convection phenomena such as thunderstorm etc,whose distribution,variation and position could be acquired through lightning observation.In this passage,the differences between lightning signal and slowly changed background noise such as cloud,earth and ocean etc were discussed on the geostationary orbit.Lightning signal intensification and detection were realized,and the project was accomplished with technical approachment through three combined methods including spectral filter,spacial filter and background noise removement between frames,on which the theoretical analysis and measurement validation were performed.