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Solar eclipse provides a unique opportunity to investigate the ionospheric response to the change in the solar flux emission towards the Earth. The variability of the ionospheric total electron content (TEC) in response to the total solar eclipse of August 21, 2017 has been studied by the analysis of dual frequency Global Positioning System (GPS) data from the University NAVSTAR Consortium (UNAVCO) established at North Carolina, USA (P779), and from the Rede Brasileira de Monitoramento Contínuo (RBMC) Amapá (APS1) station. The path of the solar obscuration passed through the North American region, also affecting the northern part of Brazil. The magnitudes of the ionospheric TEC from both monitoring stations during the eclipse are compared with those from the days immediately preceding and following it. This comparison will highlight the effects from the eclipse on the ionospheric electron density variations observed by the stations that are located over its path.