Abstract
The present work is a comparative study between the foF2 variabilities for two equatorial regions (Ouagadougou: lat. 12°21'N; long. 1°30'E, dip. 1.43° in Africa and Huancayo: Lat. 12°S; Long. 75°12'W in America) during solar cycles 20 and 21 minima and maxima phases under geomagnetic extreme conditions (quiet and disturb). Profiles from these two stations are very similar for all the seasons over the solar cycles. However, measured data from Huancayo station are higher than those from Ouagadougou station during winter with a reverse phenomenon for summer. The investigations suggest that the gap between foF2 values and the reverse phenomenon observed for the two stations may be explained by their hemispheric location (Huancayo in south hemisphere and Ouagadougou in North one). Longitudinal irregularities in ionosphere may also contribute to that little difference observed during the time interval of our investigation.
Highlights
The ionosphere is an ionized layer of Earth’s atmosphere
The investigations suggest that the gap between foF2 values and the reverse phenomenon observed for the two stations may be explained by their hemispheric location (Huancayo in south hemisphere and Ouagadougou in North one)
To better seize the level of the variations of this region in the equatorial region through its critical frequency foF2 profiles many authors have reviewed the seasonal variations of foF2 [1]-[14]
Summary
The ionosphere is an ionized layer of Earth’s atmosphere. It is one of the most important layers of Earth’s atmosphere for its role in wave propagations (communication). To better seize the level of the variations of this region in the equatorial region through its critical frequency foF2 profiles many authors have reviewed the seasonal variations of foF2 [1]-[14]. This ionospheric parameter through its in situ measurements allowed [6] to classify foF2 diurnal profiles as follow: 1) Morning peak profile characterized by a predominance morning peak; 2) Plateau profile; 3) Dome profile; 4) Reverse profile characterized by predominance afternoon peak; 5) noon bite out profile due to the presence of double peaks (morning and afternoon peaks) with trough around midday. FoF2 data from Ouagadougou and Huancayo ionosonde stations are used to illustrate the various characteristics of the F2 layer of the ionosphere through is critical frequency foF2 seasonal time variation during solar cycle minima and maxima for Ouagadougou and Huancayo
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
