@Article{MuellaDuMoPaReAlAf:2017:ClMoIo,
author = "Muella, Marcio T. A. H. and Duarte-Silva, Marcelo H. and Moraes,
Alison O. and Paula, Eurico Rodrigues de and Rezende, Luiz Felipe
Campos de and Alfonsi, Lucilla and Affonso, Bruno J.",
affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and
{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto
de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Istituto Nazionale di Geofisica e
Vulcanologia (INGV)} and {Empresa Brasileira de Aeron{\'a}utica
S.A (EMBRAER)}",
title = "Climatology and modeling of ionospheric scintillations and
irregularity zonal drifts at the equatorial anomaly crest region",
journal = "Annales Geophysicae",
year = "2017",
volume = "35",
pages = "1201--12018",
keywords = "Electromagnetics (scattering and diffraction) ionosphere
(ionospheric irregularities, modeling and forecasting.",
abstract = "In this study the climatology of ionospheric scintillations and
the zonal drift velocities of scintillationproducing
irregularities are depicted for a station located under the
southern crest of the equatorial ionization anomaly. Then, the
\α\−µ ionospheric fading model is used for the
firstand second-order statistical characterization of amplitude
scintillations. In the statistical analyzes, data are used from
single-frequency GPS receivers acquired during \∼ 17 years
(September 1997November 2014) at Cachoeira Paulista (22.4\◦
S; 45.0\◦ W), Brazil. The results reveal that the nocturnal
occurrence of scintillations follows the seasonal distribution of
plasma bubble irregularities observed in the longitudinal sector
of eastern South America. In addition to the solar cycle
dependence, the results suggest that the occurrence climatology of
scintillations is also modulated by the secular variation in the
dip latitude of Cachoeira Paulista, since the maximum occurrence
of scintillations during the peak of solar cycle 24 was \∼
20 % lower than that observed during the maximum of solar cycle
23. The dynamics of the irregularities throughout a solar cycle,
as investigated from the estimates of the mean zonal drift
velocities, presented a good correlation with the EUV and F10.7 cm
solar fluxes. Meanwhile, the seasonal behavior showed that the
magnitude of the zonal drift velocities is larger during the
December solstice months than during the equinoxes. In terms of
modeling, the results for the \α \− µ distribution
fit quite well with the experimental data and with the temporal
characteristics of fading events independently of the solar
activity level.",
doi = "10.5194/angeo-35-1201-2017",
url = "http://dx.doi.org/10.5194/angeo-35-1201-2017",
issn = "0992-7689",
language = "en",
targetfile = "muella_climatology.pdf",
urlaccessdate = "19 mar. 2024"
}