ner_tags: O O O O O B-Organization O B-Grant I-Grant I-Grant B-Organization O B-Organization O B-Grant O O O O O O O O B-Organization I-Organization I-Organization O O O O O O O
tokens: This work was funded by INCT – Estudos do Espaço, CNPq and FAPESP (proc. 2011-08171-3). This support is gratefully acknowledged. We also thank Ernesto Vieira Neto for his contribution with the numerical integrator.