@Article{AbreuMJBVFAGK:2017:CoGPMe,
author = "Abreu, Alessandro Jos{\'e} de and Martin, In{\'a}cio Malmonge
and Jesus, Rodolfo de and Bolzan, Maur{\'{\i}}cio Jos{\'e}
Alves and Venkatesh, Kavutarapu and Fagundes, Paulo Roberto and
Alves, Mauro Angelo and Gende, Maur{\'{\i}}cio and Kumar,
Sanjay",
affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Federal de Goi{\'a}s (UFG)} and {Universidade do
Vale do Para{\'{\i}}ba (UNIVAP)} and {Universidade do Vale do
Para{\'{\i}}ba (UNIVAP)} and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica (ITA)} and {Universidad Nacional de La Plata
(UNLP)} and {Banaras Hindu University}",
title = "Comparison of GPS-TEC measurements with IRI2012-TEC predictions in
the Brazilian sector during the unusual solar minimum 2009",
journal = "Annals of Geophysics",
year = "2017",
volume = "60",
number = "3",
pages = "A0331",
month = "Jan.",
abstract = "The total electron content (TEC) derived from two Global
Positioning System (GPS) receivers localized at Palmas (PAL,
10.2ºS, 48.2ºW, dip latitude 5.5ºS), near equatorial region, and
S{\~a}o Jos{\'e} dos Campos (SJC, 23.2ºS, 45.9ºW, dip latitude
17.6ºS), under the southern crest of the equatorial ionization
anomaly (EIA), in the Brazilian sector are used in this paper. TEC
from the latest available IRI-2012 model at the same locations is
also used. A comparative study between GPS-TEC and the IRI-2012
model is analyzed during the deep low solar activity period of
2009 in the unusual solar cycle 23. The measurements and the
modeled data show that the IRI-TEC model gives the better
estimates of the GPS-TEC during the nighttime from January to
December months at PAL and SJC. The IRI-TEC model shows larger
differences from the GPS-TEC in the afternoon hours, mainly at
SJC. These discrepancies observed at SJC in the afternoon hours
for all months are possibly due to the dynamics of EIA in
consequence of the equatorial fountain effect. At PAL and SJC,
oscillations of GPS-TEC with periods around 16 days in April and
periods around 27-32 days between September and December possibly
are noticed which could be related to a modulation of the
semidiurnal tide and Suns rotation, respectively. Also,
oscillations with periods around 2-4 and 5-10 days from January to
December are observed at PAL and SJC, possibly associated with the
propagation of planetary waves.",
doi = "10.4401/ag-7300",
url = "http://dx.doi.org/10.4401/ag-7300",
issn = "1593-5213",
language = "en",
targetfile = "abreu_comparison.pdf",
urlaccessdate = "15 jun. 2024"
}