@InProceedings{AdhikariMendDomiEche:2015:StFiAl,
author = "Adhikari, Binod and Mendes J{\'u}nior, Odim and Domingues,
Margarete Oliveira and Echer, Ezequiel",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Study of field aligned current (FAC) with D-component
(eastwest)and interplanetary electric field (Ey) during three
different HILDCAA events",
year = "2015",
organization = "Join Assembly",
abstract = "Field Aligned Currents (FACs) play an important role for the
coupling between ionosphere and magnetosphere. This coupling is
directly influenced by solar wind and interplanetary magnetic
field (IMF). In this work we observe characteristics of FACs
during HILDCAAs (High-Intensity, Long duration, Continuous AE
activity) by using high resolution OMNI data set consisting of
1-min averaged ACE, Wind, IMP 8 and Geo-tail magnetic field. We
also observe the perturbations in the \∆D (east-west)
component of the geomagnetic field from the low latitude station
(Vassouras) to predicate the field aligned currents. For three
different HILDCAA events, the characteristics of FACs and
perturbations in the \∆D component observe are quite
dissimilar. The wavelet techniques (CWT, DWT and wavelet modulus
correlation) and cross-correlation also show different results for
each event. The times and frequencies resolution of FAC and
\∆D obtained from CWT are different in each event. The
nature of square wavelet coefficients obtain from DWT for FAC and
\∆D are totally different. Both FAC and \∆D show
good wavelet modulus correlation with components of interplanetary
magnetic field (By and Bz) at the time of HILDCAA. We also observe
the cross-correlation between FAC and \∆D, FAC and Ey and
Ey and \∆D. During the non-storm HILDCAA, FAC shows
negative correlation with \∆D. But it shows positive
correlation for CIR and ICME preceding HILDCCAs. Similary, Ey and
FAC also show negative correlation during non-storm HILDCAA but
other two events show positive correlation. Finally, Ey and
\∆D show positive correlation for all events. Observing
these results, it can be suggested that the ground magnetic
datasets obtained from low latitude may serve as the proxy for
interplanetary conditions in the solar wind.",
conference-location = "Montreal, Canada",
conference-year = "3-7 may",
language = "en",
urlaccessdate = "27 abr. 2024"
}