摘要
本文从149次和150次太阳耀斑爆发事件所引起的 VLF 传播相位异常实例,计算获得 X 射线(0.5—4A°和1—8A°)流量 F_(?)与低电离层等效反射高度变化△h之间的函数关系;给岀了 VLF 传播相位偏移量△(?)与低电离层等效反射高度变化量△h之间关系的解折表达式;并得到了能引起'SID'效应的 X 射线(0.5—4A°和1—8A°)流量的门限值分别为1.1×10^(-4)尔格 cm^2Sec^(-1)和1.86×10^(-3)尔格 cm^(-2)Sec^(-1)。
This report gives the relationship between 0.5-4A°and 1-8A°Solar X-ray fluxes Fo and the variation △h of the effective height of the lower ionosphere during the daytime,which is obtained by calculating examples of 149 and 150 SPA events. The analytic expression between the VLF phase deviation △(?) and the variety △h is given also.It is found that the thresholds of X-ray flux to produce a detectable SPA effect are,approximately 1.1×10^(-4)erg cm^(-2)Sec^(-1)and 1.86×10^(-3)erg cm^(-2)Sec^(-1) respectively in the 0.5-4A°and 1-8A°band.
出处
《电波科学学报》
EI
CSCD
1990年第2期35-43,共9页
Chinese Journal of Radio Science
