@InProceedings{FigueiredoTaWrOtShBa:2018:MoPrDi,
author = "Figueiredo, Cosme Alexandre Oliveira Barros and Takahashi, Hisao
and Wrasse, Cristiano Max and Otsuka, Y. and Shiokawa, K. and
Barros, D.",
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 ISEE, Nagoya University,
Japan",
title = "Investigation of nighttime mstids observed by optical thermosphere
imagers at low latitude: morphology, propagation direction, and
wind filtering",
year = "2018",
organization = "Latin American Conference on Space Geophysics, 11. (COLAGE)",
note = "{Publicado na Journal of Geophysical Research: Space Physics}",
abstract = "Different types of MSTIDs have been observed over Cachoeira
Paulista (22.4 \◦S; 45.0 \◦W), Brazil, from June
2013 to December 2015 using airglow images from OI 630.0 nm.
During this period, 58 MSTIDs were classified as MSTIDs dark
band(around 10 events), and periodic MSTIDs (48 events). Dark band
MSTIDs present phase velocity between 50 and 200 m/s and
propagation direction to Northwestward. On the other hand,
periodic MSTIDs have a horizontal wavelength of 80 to 160 km, a
period ranging between 5 and 45 minutes, the phase velocity of 50
to 200 m/s, and propagation direction mainly to
North-Northeastward. The parameters indicate that the periodic
MSTIDs have different characteristics when compared with dark band
MSTIDs, suggesting that the periodic MSTIDs are not generated
through the well-known instability Perkins; in addition, this
study indicates that the spectral characteristics found in Brazil
are different from other regions such as Japan and Indonesia.
Therefore, this article intends to investigate the generation
mechanisms of the periodic MSTIDs. The anisotropy observed in the
periodic MSTID propagation direction can be explained by the wind
filtering mechanism.",
conference-location = "Buenos Aires, Argentina",
conference-year = "16-20 abr.",
language = "en",
urlaccessdate = "27 abr. 2024"
}