Global UltraViolet Imager

GUVI Biblio


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Found 3 entries in the Bibliography.

Showing entries from 1 through 3


Climatology of global, hemispheric and regional electron content variations during the solar cycles 23 and 24

We present the results of study on the variations of ionospheric total electron content (TEC) by using global, hemispheric, and regional electron contents computed from the global ionospheric maps (GIMs) for the period from 1999 to 2020. For a low and moderate solar activity, the global and regional electron contents vary linearly with solar 10.7 cm radio flux and EUV flux. While a saturation effect in the electron content verses EUV and F10.7 is found during the high solar activity periods at all regions, the maximum effec ...

Younas, Waqar; Amory-Mazaudier, C.; Khan, Majid; Amaechi, Paul;

Published by: Advances in Space Research      Published on: jul

YEAR: 2022     DOI: 10.1016/j.asr.2022.07.029

annual variation; global electron content; Ionosphere; semi-annual variation; total electron content


Impact of the intense geomagnetic storm of August 2018 on the equatorial and low latitude ionosphere

We study the impact of an intense geomagnetic storm of 25–26 August 2018 on the equatorial and low latitude ionosphere over Asia, Africa, and America. For this purpose, we have used storm-time observations from multi-site ground-based Global Positioning System receivers and magnetic observatories located at equatorial and low latitudes along the three longitudes. The storm-time variation of the electron density is assessed by the global, regional, and vertical total electron content obtained from the GPS receiver data. Bot ...

Imtiaz, Nadia; Hammou Ali, Omar; Rizvi, Haider;

Published by: Astrophysics and Space Science      Published on: nov

YEAR: 2021     DOI: 10.1007/s10509-021-04009-2

Disturbance dynamo electric field; global electron content; prompt penetration electric field; Vertical total electron content

Delay in Response of Global Electron Content and Electron Concentration at Various Altitudes to 27-Day Variations in Solar Activity

We investigate the influence of 27-day variations in solar activity related to the rotation of the Sun around its axis on the thermosphere–ionosphere system at different latitudes and heights, using the results of the calculations of the model of the Earth’s upper atmosphere. Based on the results of the model calculations, related processes in the thermosphere–ionosphere system were analyzed in the period from June 20 to July 21, 2014. There is a clear reaction to the daytime electron concentration Ne in the ionosphere ...

Klimenko, M.; Klimenko, V.; Ratovsky, K.; Yasyukevich, A.;

Published by: Russian Journal of Physical Chemistry B      Published on: may

YEAR: 2021     DOI: 10.1134/S1990793121030052

Ionosphere; global electron content; neutral composition of the thermosphere; solar activity