相关时延估计在宽带干涉仪闪电观测中的应用

Application of correlation time delay estimation in broadband interferometer for lightning detection

针对噪声对宽带干涉仪测角的干扰,提出了互相关测角算法。该方法避开频域分析,计算简单。通过仿真试验表明其抗干扰较强,具有一定的精度。通过本方法对人工引雷数据分析,能够明显定位直窜先导—继后回击过程,为宽带干涉仪测角提供了一个新思路。

To solve the noise interference in angle measurement of broadband interferometer, a correlation angle measurement algorithm was proposed. This method avoided complex analysis in frequency domain, which was easy to realize. Simulation tests indicated that it had a good ability of anti-interference, as well as a moderate precision. Data from triggered lightning was also analysed , from which we can obviously locate the process of dart leader and subsequent return stroke . So it provided a new way for angle measurement for broadband interferometer.