1. Instituto Nacional de Pesquisas Espaciais; Sao Jose dos Campos, Sao Paulo Brazil
2. Max-Planck-Institut für Sonnensystemforschung; Katlenburg-Lindau Germany
3. Center for Space Physics; Boston University; Boston Massachusetts USA
4. Universidade do Vale do Paraiba; Sao Jose dos Campos, Sao Paulo Brazil
5. Institute of Space Physics and Technology; Peking University; Beijing China
6. Centre d' Etude Spatiale des Rayonnements; Toulouse France