INVESTIGADORES
GENDE Mauricio Alfredo
congresos y reuniones científicas
Título:
Ionospheric GNSS-TEC disturbances during an intense geomagnetic storm of May 2017 over South American sector: Comparison with modeling results
Autor/es:
DE ABREU, A. J.; ROBERTO, M.; DE JESUS, R.; DENARDINI, C. M.; BOLZAN, M. J. A.; VENKATESH, K.; FAGUNDES, P. R.; ABALDE, J. R.; ALVES, LIVIA RIBEIRO; MARTIN, I. M.; GENDE M.
Lugar:
Aguascalientes
Reunión:
Simposio; Symposium SIRGAS 2018; 2018
Institución organizadora:
Instituto Nacional de Estadística y Geografía
Resumen:
Interaction between magnetosphere and ionosphere during intense geomagnetic storms continue as an important issue nowadays related to thespace weather studies. In this investigation, we present and discuss theionospheric F-region disturbances over South American sector during anintense geomagnetic storm occurred between 27 and 29 May 2017. Thisgeomagnetic storm reached a minimum Dst of -125 nT at 0700 UT on 28 May.For this investigation, we present vertical total electron content (VTEC)observations from a chain of 124 Global Navigation Satellite System (GNSS) receivers locations all over the South American sector. The stations belong to the ?Rede Brasileira de Monitoramento Contínuo (RBMC)?, operated by the ?Instituto Brasileiro de Geografia e Estatística (IBGE)?, which integrates the ?Sistema de Referencia Geocéntrico para las Américas (SIRGAS)?. We used the International Reference Ionosphere Model (IRI-2017) to simulate the VTEC and compare with GNSS-TEC observations during different phases of the storm. Also, the magnetometer measurements obtained at two stations in the low-latitude regions are presented. The results obtained are relevant to enlarge our understanding on the electrodynamics and the physical processes which involved with positive and negative ionospheric storm phases due to the prompt penetration of electric fields/disturbance of electric fields, thermospheric windcirculation changes and traveling ionospheric disturbances. The influence of these phenomena on the characteristics of ionospheric F-region over South American sector during geomagnetic disturbance will be presented and discussed.
