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Wind driven currents in the ionosphere coupled with the Earth's magnetic
field produce the Equatorial Electric Field (EEF), which is responsible
for driving many interesting ionospheric phenomena. The EEF is known
to be highly variable from day to day, primarily as a result of
solar wind electric fields penetrating from high latitudes to the
equator, in addition to variabilities in the neutral winds coming
from below. This work realistically models the daily variations
coming from the solar wind, which are mapped from interplanetary
electric field (IEF) data through a transfer function model. The
transfer function was derived from 8 years of IEF data from the ACE
satellite, radar data from JULIA, and magnetometer data from the
CHAMP satellite. This model also provides the climatology of the EEF,
which is based on six years of magnetometer measurements from the CHAMP
satellite. The model accepts as input a time and location and produces
the best estimate of the EEF for those parameters.
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