三元次声阵定位火箭发射的方法

近些年来，基于广义互相关时延估计、单阵定向多阵定位的次声定位技术得到了广泛研究，针对时间差的获取提出了大量改进方法，这些定位方法主要是针对远程次声源的定位。然而，对于持续时间长达3～4 min且处于运动状态的次声事件的定位研究较少。提出了一种基于短时能量突变的方法进行时延估计，并结合实际站台的分布情况采用三站定位方法对火箭发射事件进行定位。结果表明：单个三元次声阵定向误差在2°以内，距离误差约为3.17%（实际的距离为52.74 km，定位误差为1.67 km），定位精度较高，说明提出的时延估计定位方法是可行的。

The method of locating rocket launching with ternary infrasonic array

In recent years, infrasonic localization techniques based on generalized cross-correlation delay estimation and single-array directional multi-array localization have been widely studied, and many methods improving time difference measurement are presented. The existing localization methods are mainly used for locating remote infrasound sources. So far, only few studies have addressed the localization problem of moving infrasound events that last up to 3~4 minutes. In this paper, a time-delay estimation method based on short-time energy mutation is proposed, and a three-station localization method is used to locate rocket launch events according to the distribution of actual stations. The results show that the orientation error of a single ternary infrasound array is less than 2° and the distance error is about 3.17% in the case that the actual distance is 52.74 km and the locating error is 1.67 km, so the locating accuracy is higher. The research shows that the proposed time delay estimation locating method is feasible.