摘要
在2009年7月22日日全食期间,用美国斯坦福大学太阳中心提供的电离层突扰(SID)监测仪对甚低频(VLF)信号进行观测时发现:日全食期间的VLF信号强度变化异常,出现类似日出日落的效应;信号强度振幅变大,类似于雷电效应;而且信号强度在日全食前后一段时间内都有所增强.在对观测数据的可靠性进行充分讨论的基础上,对比以往的观测结果,发现电离层会在日全食发生之前有所变化.
Using the sudden ionospheric disturbance (SID) monitor provided by Stanford University, the very low frequency (VLF) signals were observed in Nanjing during the total solar eclipse on Jul. 22nd 2009. It is found that the intensity of the VLF signals evidently increased during the total solar eclipse, similar to the effect of sunrise and sunset. The intensity of the VLF signals strongly fluctuated, similar to the phenomena of thunderbolt. Moreover, this intensity increased during both periods before and after the total eclipse. Based on the discussions of the reliability of the observational data and the comparison with the previous observations, the possible explanation for the variation of ionosphere before the total solar eclipse is proposed.
出处
《天文学报》
CSCD
北大核心
2010年第3期278-284,共7页
Acta Astronomica Sinica
关键词
日月食
地球
大气层
方法
数据分析
eclipses, earth
atmosphere, methods
data analysis