@InProceedings{PaulaMCNBMCAM:2018:IoAmSc,
author = "Paula, Eurico Rodrigues de and Moraes, Alison de Oliveira and
Caton, Ron and Negreti, Patr{\'{\i}}cia Mara de Siqueira and
Batista, Inez Staciarini and Martinon, Andr{\'e} Ricardo Fazanaro
and Cunha Neto, Ac{\'a}cio and Abdu, Mangalathayil Ali and
Monico, Jo{\~a}o Francisco Galera",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Air Force Research
Laboratory} and {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)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista
(UNESP)}",
title = "Ionospheric amplitude scintillation behavior over the low latitude
station of S{\~a}o Lu{\'{\i}}s during the September 6 to 10,
2017 magnetic storm",
year = "2018",
organization = "AGU Fall Meeting",
abstract = "The September 6 to 10, 2017 magnetic storm was caused by an X9
solar flare followed by a CME and the maximum Sym H magnetic index
reached a value of -146 nT at 01:08 UT on day 08, after a Bz
southward incursion of -31.21nT at 23:31 UT on day 07 and the Kp
magnetic index reached 8. The solar wind increased from 400 km/s
to about 600 km/s around 24 UT of day 06 and to about 800 km/s in
the following night of 07/08. During the recovery phase of this
storm there was another Bz southward incursion of -17.46 nT at
11:55 UT on day 08 when Sym H reached -115 nt at 13:56 UT and Kp
reached the value of 8.33. In this work the ionospheric amplitude
scintillation at S{\~a}o Lu{\'{\i}}s (02.5o S, 44.3 o W, dip
lat -04.67 o) was studied using data from an AFRL/INPE VHF
receiver and a CIGALA/CALIBRA Septentrio receiver, both installed
at S{\~a}o Lu{\'{\i}}s. The vertical plasma drift during
daytime hours was determined using the magnetometer data from
Bel{\'e}m (1.5 o S, 48.5 o W, dip lat -1.12 o) and Petrolina
(09.4 o S, 40.5 o W, dip lat -13.45 o) and that during the evening
prereversal enhancement period was calculated using ionogram data
from the S{\~a}o Lu{\'{\i}}s digisonde. Compared to the
geomagnetically quiet days of September 2017, both VHF and GNSS S4
scintillation indices presented an increase during the night of
07/08 when there was a strong increase in the vertical plasma
drift due to a prompt penetration under-shielding electric field
of eastward polarity (Ey) of about 17 mV/m magnitude. In contrast
to this, on the night of 08/09 the ionospheric scintillation was
completely inhibited as is a typical response to a disturbance
dynamo electric field of westward polarity. During the following
nights scintillation events were again gradually observed. Another
Ey increase was observed at about 12 UT (09 LT) on day 08 when no
scintillation was normally observed since it was daytime. The
zonal drift determined by the VHF receiver around 24 UT (21 LT)
was about 100 m/s and 150 m/s eastward on the nights of 05/ 06 and
06/07, respectively. However, during the night of 07/08 of the
storm, the zonal drift reversed to westward with a velocity of
about -80 m/s. After the storm period the zonal drifts became
eastward.",
conference-location = "Washington, D. C.",
conference-year = "10-14 dec.",
language = "en",
targetfile = "paula_ionospheric.pdf",
urlaccessdate = "16 jun. 2024"
}