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Ionospheric GPS-TEC responses from equatorial region to the EIA crest in the South American sector under intense space weather conditions
(Elsevier, 2022-01)
We present and discuss the ionospheric F-region observations from equator to the equatorial ionization anomaly (EIA) regions over the South American sector during an intense space weather event occurred between 27 and May ...
Influence of Ionospheric Scintillation on GNSS Satellite Constellation Geometry
(Ieee, 2018-01-01)
Ionospheric scintillation is a serious concern for GPS users under low latitude regions. Under extreme cases, scintillation may lead to a full disruption of the receiver operation. This work presents a statistical analysis ...
Influence of Ionospheric Scintillation on GNSS Satellite Constellation Geometry
(2018-01-01)
Ionospheric scintillation is a serious concern for GPS users under low latitude regions. Under extreme cases, scintillation may lead to a full disruption of the receiver operation. This work presents a statistical analysis ...
Low-latitude equinoctial spread-F occurrence at different longitude sectors under low solar activity
(Copernicus Publications, 2013-02-05)
We present the results of a comparative study of spread-F signatures over five low-latitude sites: Chiangmai (CGM; 18.8° N, 98.9° E, mag. Lat. 8.8° N), Thailand; Tanjungsari (TNJ; 6.9° S, 107.6° E, mag. Lat. 16.9° S), ...
On ionic contributions to Pedersen conductance
(Blackwell Publishing Ltd, 2018-12)
Ionospheric conductivity is a key parameter to understand the upper atmosphere electrodynamics, magnetosphere-ionosphere-thermosphere coupling and several geophysical processes. In the case of Pedersen conductivity, ions ...
Ionospheric TEC Weather Map Over South America
(Amer Geophysical Union, 2016-11-01)
Ionospheric weather maps using the total electron content (TEC) monitored by ground-based Global Navigation Satellite Systems (GNSS) receivers over South American continent, TECMAP, have been operationally produced by ...
NmF2 trends at low and mid latitudes for the recent solar minima and comparison with IRI-2012 model
(Elsevier, 2017-07)
The ionospheric electron density peak (NmF2) is analyzed for the recent minima of solar activity for two mid-latitude stations, Rome (41.8°N, 12.5°E, geomagnetic latitude 41.7°N, Italy) and Gibilmanna (37.9°N, 14.0°E, ...
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
(Editrice Compositori Bologna, 2017-01)
The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, ...
Early morning enhancement in ionospheric electron density
(Elsevier, 2012-01)
This study reports on ionospheric disturbances that occurred in the early morning hours in the South American–Atlantic sector during a few intense/super storm events. The events were observed at latitudes close to the ...
Programa científico para o monitoramento em tempo real ou pós-processado das irregularidades ionosféricas e cintilação dos sinais GNSS
(2016-01-01)
Brazil is one of the countries that suffer more the effects of the ionosphere, especially those from the Equatorial Ionization Anomaly, ionospheric irregularities and scintillation of GNSS (Global Navigation Satellite ...