@InProceedings{EssienTaFiWrBaGo:2019:StMeTr,
author = "Essien, Patrick and Takahashi, Hisao and Figueiredo, Cosme
Alexandre Oliveira Barros and Wrasse, Cristiano Max and Barros,
Diego and Gobbi, Delano",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Study on Medium-Scale Traveling Ionospheric Disturbances Observed
in the South American Equatorial Region",
year = "2019",
organization = "AGU Fall Meeting",
abstract = "This work presents Medium-Scale Traveling Ionospheric Disturbances
(MSTIDs) over the South American equatorial and low latitude
regions (latitude 0 - 15o south and longitude 30o - 55o west)
during the maximum to minimum phase of solar cycle 24. Using data
collected by GNSS (GPS and GLONASS) dual frequency receivers
network, detrending total electron content (TEC) maps were
constructed to find out the presence of MSTIDs, and keograms were
used to characterize MSTIDs. The horizontal wavelengths of the
MSTIDs were mostly concentrated between 500 and 800 km, with mean
values of 654 ± 110 km while the observed periods were distributed
around 30 - 40 min with the mean of 35 ± 5 min, and the horizontal
phase speeds extended from 200 - 400 m/s, with mean of 290 ± 110
m/s. Most of the MSTIDs were observed during the daytime in winter
solstice (June-August) and tend to propagate northeastward and
northwestward. Atmospheric gravity waves could be the prime
precursor of the MSTIDs that propagated in the same direction.
However, during summer solstice the MSTIDs propagated in all
directions. It is noted that a few oscillations of MSTIDs
propagated to southeast along the year, which could be associated
with Intertropical Convergence Zone (ITCZ).",
conference-location = "San Francisco, CA",
conference-year = "09-13 dec.",
language = "en",
targetfile = "essien_study.pdf",
urlaccessdate = "04 maio 2024"
}