GNSS Derived Ionospheric TEC Observed Through Different TEC Calibration Techniques in the Brazilian Sector

Fabio Becker-Guedes1, Carolina S Carmo1, Paulo O Camargo2, Joao F. Galera Monico2 and Claudia M Nicoli Candido3, (1)INPE National Institute for Space Research, Sao Jose dos Campos, Brazil, (2)UNESP Sao Paulo State University, Presidente Prudente, Brazil, (3)NSSC National Space Science Center, CAS, Beijing, China