Equatorial and Low-Latitude Ionospheric Effects on GPS Signals in Space and on Ground Based Augmentation System Operations

Teddy M. Surco Espejo1, Emanoel Costa1, Alison de Oliveira Moraes2, Eurico R De Paula3 and Joao Francisco Galera Monico4, (1)Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio De Janeiro, Brazil, (2)Aeronautics and Space Institute (IAE), Sao Jose dos Campos, Brazil, (3)INPE National Institute for Space Research, Aeronomy Division, Sao Jose dos Campos, Brazil, (4)FCT/UNESP, Presidente Prudente, Brazil