@Article{FigueiredoTaWrOtShBa:2018:MeTrIo,
author = "Figueiredo, Cosme Alexandre Oliveira Barros and Takahashi, Hisao
and Wrasse, Cristiano Max and Otsuka, Y. and Shiokawa, K. and
Barros, Diego",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and ISEE, Nagoya University, Japan and
ISEE, Nagoya University, Japan and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Medium-scale traveling ionospheric disturbances observed by
detrended total electron content maps over Brazil",
journal = "Journal of Geophysical Research: Space Physics",
year = "2018",
volume = "123",
number = "3",
pages = "2215--2227",
month = "Mar.",
keywords = "gravity waves, ionosphere, TEC, TIDs, MSTIDs, GPS.",
abstract = "A ground-based network of Global Navigation Satellite Systems
receivers has been used to monitor medium-scale traveling
ionospheric disturbances (MSTIDs). MSTIDs were studied using total
electron content perturbation maps and keograms over
south-southeast of Brazil during the period from December 2012 to
February 2016. In total, 826 MSTIDs were observed mainly in
daytime, thus presenting median values of horizontal wavelength,
period, and horizontal phase velocity of 452 +/- 107 km, 24 +/- 4
min. and 323 +/- 81 m/s, respectively. The direction of
propagation varies on the season: during the winter (June-August),
the waves preferentially propagated to north-northeast, while in
the other seasons the waves propagated to other directions. The
anisotropy observed in the MSTID propagation direction could be
associated with the region of the gravity wave generation that
takes place in the troposphere. We also found that the MSTIDs were
observed most frequently during the daytime, between 11 and 15
local time in winter and near to dusk solar terminator (17-19
local time) in the other seasons. Furthermore, the occurrence of
MSTIDs was higher in winter. We suggest that atmospheric gravity
waves in the thermosphere, mesosphere, and troposphere could play
an important role in generating the MSTIDs and the propagation
direction may depend on location of the wave sources.",
doi = "10.1002/2017JA025021",
url = "http://dx.doi.org/10.1002/2017JA025021",
issn = "2169-9402",
language = "en",
targetfile = "Figueiredo_medium.pdf",
urlaccessdate = "28 abr. 2024"
}