@Article{ChenDRCMSCP:2021:EvSoQu,
author = "Chen, Sony Su and Denardini, Clezio Marcos and Resende, La{\'y}sa
Cristina Ara{\'u}jo and Chagas, Ronan Arraes Jardim and Moro,
Juliano and Silva, R{\'e}gia Pereira da and Carmo, Carolina de
Sousa do and Pican{\c{c}}o, Giorgio Arlan da Silva",
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)} 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)}",
title = "Evaluation of the Solar Quiet Reference Field (SQRF) model for
space weather applications in the South America Magnetic Anomaly",
journal = "Earth, Planets and Space",
year = "2021",
volume = "73",
number = "1",
pages = "e61",
month = "Dec.",
keywords = "Geomagnetic quiet daily feld variation, Space weather, Predicting,
Empirical mode.",
abstract = "In the present work, we evaluate the accuracy of the Solar Quiet
Reference Field (SQRF) model for estimating and predicting the
geomagnetic solar quiet (Sq) daily field variation in the South
America Magnetic Anomaly (SAMA) region. This model is based on the
data set of fluxgate magnetometers from 12 magnetic stations of
the Embrace Magnetometer Network (Embrace MagNet) from 2010 to
2018. The model predicts the monthly average horizontal field of
the geomagnetic quiet (Sq-H) daily variation solving a set of
equations for the specified geographic coordinates in terms of the
solar cycle activity, the day of the year, and the universal time.
We carried out two comparisons between the prediction and
observational data of the Sq-H field. The first part attempts to
evaluate the accuracy for estimating the Sq-H field over
Medianeira (MED, 25.30° S, 54.11° W, dip angle: \− 33.45°)
by using linear interpolation on the SQRF coefficients and
comparing it with the data collected from April to December in
2018. None of the datasets collected at MED is part of the dataset
used to build the SQRF model. The second part of the analysis
attempts to evaluate the accuracy for predicting the quiet daily
field variation over Cachoeira Paulista (CXP, 22.70° S, 45.01° W,
dip angle: \− 38.48°). The dataset collected at CXP before
the period analyzed in the present work is part of the dataset
used to build the SQRF model. Thus, the prediction accuracy is
tested using magnetic data outside the time interval considered in
the model. The prediction results for both locations show that
this empirical models outputs present a good agreement with the
Sq-H field obtained from the ground-based magnetometer
measurements. The accuracy of the SQRF model (high correlation, r
> 0.9) indicates a high potential for estimating and predicting
geomagnetic quiet daily field variation. Concerning space weather
applications, the model improves the scientific insight and
capability of space weather prediction centers to predict the
variability of the regular solar quiet field variation as
reference conditions, which may include areas with no
measurements.",
doi = "10.1186/s40623-021-01382-8",
url = "http://dx.doi.org/10.1186/s40623-021-01382-8",
issn = "1343-8832",
language = "en",
targetfile = "chen_evaluation.pdf",
urlaccessdate = "20 maio 2024"
}