北京地区电离层电子含量的某些特性

SOME CHARACTERISTICS OF IONOSPHERIC ELECTRON CONTENT MEASURED AT BEIJING STATION

从对1980年至今的北京电离层电子含量的常规观测资料分析发现:电离层电子含量(IEC)的周日变化曲线除了绝大多数呈单峰变化外,还有非扰动状态下的周日双峰变化、夜增长现象以及日出后不久的次极大正午之后的主极大等.本文着意于报道北京地区的IEC双峰特性和夜增现象及其随太阳活动的周期变化,并与其它报道进行比较.

The ionospheric electron content (IEC) has been measured at Beijing for almost a whole solar cycle since 1980. From the analysis of the data, the following conclusions are obtained: there are undisturbed diurnal double-peak variations, noctural peak and a specific two-peak curves showing a subpeak before noon and a main peak after noon, although the variations of diurnal, seasonal and annual IEC are recorded in high probability. It is the purpose of this paper to give the double-peak characteristics and nocturnal peak at Beijing and their variation in solar cycle. The results is compared with those of other scientists.