We have used data from two equatorial stations in the African longitude sector to study the
monthly variability of ƒoF2. Diurnal, seasonal, and solar activity effects were investigated …

This paper presents the impact of diurnal, seasonal and solar activity effects on the
variability of ionospheric foF2 in the African equatorial latitude. Three African ionospheric …

High frequency (HF) radio wave propagation is sensitive to ionospheric disturbances
caused by space weather. Changes in propagation conditions can be directly measured …

We analyse the variability of foF2 at two West Africa equatorial ionization anomaly stations
(Ouagadougou and Dakar) during three solar cycles (from cycle 20 to cycle 22), that is, from …

This paper presents the diurnal, seasonal, and solar activity impacts on the variability of
ionospheric foF2 over the Southeast Asian sector. Data from three ionosonde stations …

The aim of this paper is to study maximum usable frequency (MUF) variability over
Peninsular Malaysia (112.5° E, 2.5° N) which is located in the equatorial region during the …

Considering that day-to-day foF2 variability is expressed by the fraction of hourly daily
values to their corresponding monthly median and selecting the 25% level (quartile) as an …

The diurnal and seasonal changes of the variability (VR) of Maximum Useable Frequency
(MUF) are compared with those of peak electron density (NmF2) at Ibadan (7.4° N, 3.9° E, 6° …

The paper goal is to analyze the variability of foF2 at African equatorial stations and the
effect of dip angle on this variability. The gap between the dip angle of Dakar and …

本文采用欧洲22 个台站的电离层F2 层峰值电子密度NmF2, 分析了其逐日变化分量的相关距离
S, 着重研究了S 的周日变化, 季节变化及其随太阳活动和地磁活动的变化 …