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Simulation study of the influence of the ionospheric layer height in the thin layer ionospheric model
(Springer, 2011-04)
This work aims to contribute to the understanding of the influence of the ionospheric layer height (ILH) on the thin layer ionospheric model (TLIM) used to retrieve ionospheric information from the GNSS observations. ...
IonMAP: Sistema de assimilação de dados para o imageamento tridimensional da ionosfera no Brasil
(Universidade Estadual Paulista (Unesp), 2019-01-25)
A considerável variação espaço-temporal da densidade eletrônica na atmosfera superior terrestre torna a ionosfera uma região de difícil modelagem. Parte dos modelos que utilizam as observáveis do Sistema Global de Navegação ...
Aspect sensitivity measurements of VHF backscatter made with the Chung‐Li radar: Plausible mechanisms
(American Geophysical Union, 1989-03)
A new technique, using beam broadening effects, has been developed to measure the aspect sensitivity of atmospheric clear air VHF radar echoes. It uses the relatively broad antenna beam of the vertical‐pointing antenna of ...
Solving Long-Standing meteor mysteries
(The Pennsylvania State University, 2009-08)
Millions of meteoroids strike and disintegrate in the Earth's upper atmosphere every day and may be seen as visible or radar meteors. Although very few of the these foreign bodies actually make it to the surface of the ...