A method for determining D region ionosphere reflection height from lightning skywaves
A method for determining D region ionosphere reflection height from lightning skywaves
复制标题
闪电天波确定D区电离层反射高度的方法
DOI：
10.1016/j.jastp.2021.105692
复制
发表时间：
2021
影响因子：
1.9
通讯作者：
F. Xiao
中科院分区：
文献类型：
--
作者：
Xiao Zhou;Jiaquan Wang;Qiming Ma;Qijun Huang;F. Xiao
闪电产生的天波用于研究电离层。先前的研究根据地波与第一天波之间的时间延迟计算了电离层D区的反射高度。本文提出了一种检测电离层的新方法。一组地波延迟值用于计算对应于第一和第二天波的高度。通过比较第一和第二天波的相应高度之间的最小差值来确定高度。高度不确定度优于 1.5 公里。与以往研究中选择几百公里范围内的闪电不同，新方法可以选择2000公里范围内的闪电进行计算。结果表明，地波延迟引起的误差是可以纠正的。对于24小时内发生闪电的地区，夜间观测到的最高高度为88公里，而白天的最低高度为66.7公里。在没有太阳耀斑 X 射线的情况下，白天的高度与太阳天顶角密切相关。
The sky waves generated by lightning are used to study the ionosphere. Previous studies calculated the reflection height of the ionosphere D region based on the time delay between the ground wave and the first skywave. This paper presents a new method for detecting the ionosphere. A set of ground wave delay values are used to calculate the height corresponding to the first and second skywaves. The height is determined by comparing the minimum difference between the corresponding heights of the first and the second skywaves. The height uncertainty is better than 1.5 km. Different from the previous studies for selecting lightning within a few hundred kilometers, the new method can select lightning within 2000 km for calculation. The results show that the errors caused by the ground wave delay can be corrected. For a region where lightning occurred in 24 h, the maximum height observed at night was 88 km, while the minimum height during the day was 66.7 km. In the absence of solar flare X-rays, the height during the day is strongly correlated with the solar zenith angle.