中纬E层临界频率和低电离层的电子密度剖面计算

本文给出了计算中纬E层临界频率(f_0E)和低电离层的电子密度分布与太阳天顶角、太阳黑子数、地方时之间关系的经验公式.由它对不同年、月、日以及午前、午后情况进行计算的结果与实验探测数据符合得较好;将该公式用于长波传播和吸收计算也得到了与实验一致的结果.此外, 它还能由实测的f_0E值算出D区电子密度分布. 

Critical Frequencies of E-layer in Mid-latitudes and theCalculations of Electron Density Profiles inthe Lower Ionosphere

In this paper, experimental formulae of the critical frequencies of the E-layer in mid-latitudes and of the distribution of electron density in the lower ionosphere are found. These formulae are expressed in terms of the sunspots number, the solar zenith angle and the local time. The results of calculations from them for different years, months, days for both before and afternoon time and calculations for propagation of the long radio wave and its absorptions are all in agreement with data of observations. In addition, it is possible to calculate the distribution of electron density in the D-region from f_0E obtained by vertical soundings.