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Ionospheric tomography using GNSS: multiplicative algebraic reconstruction technique applied to the area of Brazil
(2016-10-01)
Experimental analysis was performed using multiplicative algebraic reconstruction technique (MART) to map the ionosphere over Brazil. Code and phase observations from the global navigation satellite system (GNSS) together ...
Multimodel comparison of the ionosphere variability during the 2009 sudden stratosphere warming
(American Geophysical Union, 2016-07-18)
A comparison of different model simulations of the ionosphere variability during the 2009 sudden stratosphere warming (SSW) is presented. The focus is on the equatorial and low‐latitude ionosphere simulated by the ...
A new source of the midlatitude ionospheric peak density structure revealed by a new Ionosphere‐Plasmasphere model
(American Geophysical Union, 2016-02-02)
The newly developed Ionosphere‐Plasmasphere (IP) model has revealed neutral winds as a primary source of the “third‐peak” density structure in the daytime global ionosphere that has been observed by the low‐latitude ...
Bottom side profiles for two close stations at the southern crest of the EIA: Differences and comparison with IRI-2012 and NeQuick2 for low and high solar activity
(Elsevier, 2018-02)
Bottom side electron density profiles for two stations at the southern crest of the Equatorial Ionization Anomaly (EIA), Sao José dos Campos (23.1_S, 314.5_E, dip latitude 19.8_S; Brazil) and Tucumán (26.9_S, 294.6_E, dip ...
Disturbance zonal and vertical plasma drifts in the Peruvian sector during solar minimum phases
(American Geophysical Union, 2016-02-11)
In the present work, we investigate the behavior of the equatorial F region zonal plasma drifts over the Peruvian region under magnetically disturbed conditions during two solar minimum epochs, one of them being the recent ...
Detecting ionospheric precursors of a deep earthquake (378.8 km) on 7 july 2013, m w=7.2, in papua new guinea under a geomagnetic storm: two-dimensional principal component analysis
(UNIVERSIDAD NACIONAL DE COLOMBIA, 2013)
Two-dimensional ionospheric total electron content (TEC) data were collected during the time period from 00:00 on 2 July to 12:00 UT on 08 July 2013. This period spanned 5 days before to 1 day after a deep earthquake (378.8 ...
NeQuick 2 and IRI Plas VTEC predictions for low latitude and South American sector
(Elsevier, 2018-04)
Using vertical total electron content (VTEC) measurements obtained from GPS satellite signals the capability of the NeQuick 2 and IRI Plas models to predict VTEC over the low latitude and South American sector is analyzed. ...
Effects of X2-class solar flare events on ionospheric GPS-TEC and radio waves over Brazilian sector
(Elsevier, 2019-06)
In this investigation, we present and discuss the effects of 6 X2-class solar flare events in the ionospheric F region over Brazilian sector that occurred during 2013 to 2015. For this investigation, we present the vertical ...
The November 2004 superstorm: Comparison of low-latitude TEC observations with LLIONS model results
(Elsevier, 2009-04-07)
We investigate the effects of penetration electric fields, meridional thermospheric neutral winds, and composition perturbation zones (CPZs) on the distribution of low-latitude plasma during the 7–11 November 2004 geomagnetic ...