Livia Ribeiro Alves, INPE National Institute for Space Research, Sao Jose Dos Campos, Brazil, Graziela Belmira Dias da Silva, MCT INPE, São José dos Campos, SP, Brazil, Ligia Alves Da Silva, Inst Nac Pesquisas Espaciais, Sao José dos Campos, Brazil, David G Sibeck, NASA/GSFC, Greenbelt, MD, United States, Shrikanth G Kanekal, NASA GSFC, Greenbelt, MD, United States and John R Wygant, University of Minnesota, Minneapolis, MN, United States