Assessment of periodic signals in GNSS station coordinate time series

Gabriela de Oliveira Nascimento Brassarote, Sao Paulo State University - UNESP, Presidente Prudente, Brazil, Eniuce Menezes de Souza, Maringa State University, Department of Statistics, Maringa, Brazil and Joao Francisco Galera Monico, Sao Paulo State University - UNESP, Department of Cartography, Presidente Prudente, Brazil