@Article{AbreuCDJVRAFBG:2022:IoGPRe,
               author = "Abreu, Alessandro Jos{\'e} de and Correia, Em{\'{\i}}lia and 
                         Denardini, Clezio Marcos and Jesus, Rodolfo de and Venkatesh, K. 
                         and Roberto, M. and Abalde, J. R. and Fagundes, P. R. and Bolzan, 
                         M. J. A. and Gende, M.",
          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 Physical Research Laboratory, Navrangpura 
                         and {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade Federal de Jata{\'{\i}} (UFJ)} and {Universidad 
                         Nacional de La Plata (UNLP)}",
                title = "Ionospheric GPS-TEC responses from equatorial region to the EIA 
                         crest in the South American sector under intense space weather 
                         conditions",
              journal = "Journal of Atmospheric and Solar Terrestrial Physics",
                 year = "2022",
               volume = "227",
                pages = "e105801",
                month = "Jan.",
             keywords = "EIA, Geomagnetic storm, GPS, Ionosphere.",
             abstract = "We present and discuss the ionospheric F-region observations from 
                         equator to the equatorial ionization anomaly (EIA) regions over 
                         the South American sector during an intense space weather event 
                         occurred between 27 and May 29, 2017. During this geomagnetic 
                         storm, the symmetric-H (SYM-H) reached a minimum of \−142 
                         nT at \∼0700 UT on May 28, 2017. For this investigation, we 
                         analyze the vertical total electron content (VTEC) observations 
                         from a chain of nearly 120 Global Positioning System (GPS) 
                         stations. Magnetometer measurements obtained at two stations in 
                         the low latitude regions are also presented. The observations do 
                         not indicate prompt penetration electric field (PPEF) effects in 
                         the VTEC variations. Magnetometer's observations over Cuiab{\'a} 
                         (CBA) and Cachoeira Paulista (CXP) in central west and south parts 
                         of Brazil, respectively, have shown a strong cross-correlation 
                         with SYM-H in the period between 3 and 48 h. The results also show 
                         positive ionospheric storm phase during the recovery phase on May 
                         28, 2017. Positive effect during the recovery phase of the 
                         geomagnetic storm is possibly associated with effects of 
                         disturbances winds. During the recovery phase, a strong 
                         intensification of the EIA took place, possibly related to an 
                         additional ionization effect. The VTEC values show differences 
                         between the west and east sectors. This indicates that the EIA 
                         crest is stronger in the east sector than in the west sector, 
                         possibly due to the combination of disturbance wind effects and 
                         geomagnetic field geometry where in the east sector the field 
                         lines are more inclined.",
                  doi = "10.1016/j.jastp.2021.105801",
                  url = "http://dx.doi.org/10.1016/j.jastp.2021.105801",
                 issn = "1364-6826",
             language = "en",
           targetfile = "Abreu_Ionospheric_2022.pdf",
        urlaccessdate = "28 abr. 2024"
}