%0 Conference Proceedings
%4 sid.inpe.br/mtc-m21c/2019/06.18.12.45
%2 sid.inpe.br/mtc-m21c/2019/06.18.12.45.19
%T Study of medium-scale traveling ionospheric disturbances observed in the South American equatorial and low latitude region
%D 2019
%A Essien, Patrick,
%A Takahashi, Hisao,
%A Figueiredo, Cosme Alexandre Oliveira Barros,
%A Wrasse, Cristiano Max,
%A Barros, C. M.,
%A Gobbi, Delano,
%A Lomotey, S. O.,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress patrick.essien@inpe.br
%@electronicmailaddress
%@electronicmailaddress cosme.figueiredo@inpe.br
%@electronicmailaddress cristiano.wrasse@inpe.br
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress eurico.paula@inpe.br
%B CEDAR
%C Santa Fe, New Mexico
%8 16-21 june
%X Total electron content (TEC) fluctuation in the ionosphere is one of the main unresolved problems on navigation systems, related to degrading resolution and reliability of the ground positioning. The South American low/equatorial latitude ionospheric region is where the highest spatial and temporal variations ofTEC and various features of the ionosphere such as Medium-Scale Traveling Ionospheric Disturbances (MST!Ds) among others can be found. Therefore, the need to study the MSTIDs that propagate in the regions is the main focus of the present work. Using data collected by GNSS (GLONASS and GPS specifically) dual frequency receivers network over the South American region, we developed detrending TEC maps to recognize the presence and characterize MST!Ds in terms of horizontal wavelength, period, phase velocity and propagation direction. Preliminary results obtained from the data in 2014 and 2015 are presented and discussed. We noted that atmospheric gravity waves could be one of the prime precursors of the MST!Ds observed.
%@language en