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C/NOFS satellite observations of equatorial ionospheric plasma structures supported by multiple ground‐based diagnostics in October 2008
(American Geophysical Union, 2011-10-28)
In early October 2008, the C/NOFS satellite orbited near the magnetic equator at its perigee altitude of ∼400 km at dusk in the Peruvian sector. This provided an ideal opportunity for a comparison, under the current very ...
Localized increment and decrement in the total electron content of the ionosphere as a response to the April 20, 2018, geomagnetic storm
(Hindawi Limited, 2018)
A moderate geomagnetic storm occurred on April 20, 2018. Using vertical total electron content (VTEC) maps provided by the Center for Orbit Determination in Europe, ionospheric responses to the geomagnetic storm could be ...
Peculiar features of the low‐latitude and midlatitude ionospheric response to the St. Patrick's Day geomagnetic storm of 17 March 2015
(American Geophysical Union, 2016-07-25)
The current study aims at investigating and identifying the ionospheric effects of the geomagnetic storm that occurred during 17–19 March 2015. Incidentally, with SYM‐H hitting a minimum of −232 nT, this was the strongest ...
Storm‐enhanced plasma density and polar tongue of ionization development during the 15 May 2005 superstorm
(American Geophysical Union, 2015-05-20)
We investigate the ionosphere's global response to the 15 May 2005 superstorm in terms of storm evolution and ionospheric electrodynamics. Our aim is to study the global distribution of plasma and the resultant large‐scale ...
Modeling the equatorial and low‐latitude ionospheric response to an intense X‐class solar flare
(American Geophysical Union, 2015-03-11)
We have investigated the ionospheric response close to the subsolar point in South America due to the strong solar flare (X2.8) that occurred on 13 May 2013. The present work discusses the sudden disturbances in the D ...
Ionospheric Scintillation Fading Coefficients for the GPS L1, L2, and L5 Frequencies
(Amer Geophysical Union, 2018-09-01)
The terrestrial ionosphere over low-latitude regions presents the unique phenomena of the equatorial ionization anomaly (characterized by global maximum in plasma concentration) and plasma-depleted regions known as equatorial ...
Emergence of a localized total electron content enhancement during the severe geomagnetic storm of 8 September 2017
(Copernicus GmbH, 2019-03)
In this work, the results of the analysis on total electron content (TEC) data before, during and after the geomagnetic storm of 8 September 2017 are reported. One of the responses to geomagnetic storms due to the southern ...
Emergence of a localized total electron content enhancement during the severe geomagnetic storm of 8 September 2017
(Copernicus GmbH, 2019-03)
In this work, the results of the analysis on total electron content (TEC) data before, during and after the geomagnetic storm of 8 September 2017 are reported. One of the responses to geomagnetic storms due to the southern ...
Ionospheric effects of sudden stratospheric warming during moderate-to-high solar activity: Case study of January 2013
(American Geophysical Union, 2013-09-24)
A major sudden stratospheric warming (SSW) occurred in January 2013 during moderate-to-high solar activity conditions. Observations during the winter of 2012/2013 reveal strong ionospheric disturbances associated with this ...
Diurnal evolution of the F region electron density local time gradient at low and middle latitudes resolved by the Swarm constellation
(American Geophysical Union, 2016-09-02)
In this study we have provided new insights into the local time gradient of F region electron density (ΔNe) derived from the lower pair of Swarm satellites flying side by side. Our result shows that the electron density ...