@Article{BragaDalEchSteMen:2017:PsDeCo,
author = "Braga, Carlos Roberto and Dal Lago, Alisson and Echer, Ezequiel
and Stenborg, Guillermo and Mendon{\c{c}}a, Rafael Rodrigues
Souza de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {U.S. Naval Research Laboratory}
and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Pseudo-automatic determination of coronal mass ejections'
kinematics in 3D",
journal = "Astrophysical Journal",
year = "2017",
volume = "842",
number = "2",
pages = "134",
month = "June",
keywords = "interplanetary medium, solar–terrestrial relations, Sun: corona,
Sun: coronal mass ejections (CMEs), techniques: image
processing.",
abstract = "Coronal mass ejection (CME) events are among the main drivers of
geomagnetic disturbances, and hence play a central role in the
SunEarth system. Their monitoring and, in particular, the
determination of their speed and direction of propagation are key
issues for the forecasting of space weather near to Earth. We have
implemented a method to track CME events in three dimensions by
combining triangulation and tie-pointing analysis with a
supervised computer vision algorithm. This novel approach does not
rely on any geometric constraint, and eliminates the need for
visual identification of the CME boundaries. We applied our method
to 17 CME events observed simultaneously by the twin Solar
Terrestrial Relations Observatory (STEREO) COR2 coronagraph
imagers from 2008 December to 2011 November in order to obtain
their 3D kinematical characterization (i.e., the velocity vector)
along with their morphological properties. About ten of these
events have already been analyzed using other methodologies. In
these cases, we carried out a thorough comparison with our results
and found that, in spite of the different nature and spatial
coverage range of the other methods with respect to CORSET3D, the
majority of the results agree. We found, however, that three
events exhibited discrepancies in the magnitude of the velocity
vector, four in the longitudinal direction of propagation, and in
only one case was there a discrepancy in latitude. The
discrepancies appeared in those cases where quasi-simultaneous,
quasi-colocated events were observed in the coronagraphs fields of
view.",
doi = "10.3847/1538-4357/aa755f",
url = "http://dx.doi.org/10.3847/1538-4357/aa755f",
issn = "0004-637X and 1538-4357",
language = "en",
targetfile = "braga_pseudo.pdf",
urlaccessdate = "19 mar. 2024"
}