1. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
2. Institut für Geophysik und Extraterrestrische Physik; Technische Universität Braunschweig; Braunschweig Germany
3. Indian Institute of Geomagnetism; Navi Mumbai India
4. CSPAR; University of Alabama in Huntsville; Huntsville Alabama USA
5. Instituto Nacional Pesquisas Espaciais; São Jose dos Campos Brazil
6. Department of Physics and Astronomy; Universidade do Vale do Paraíba; São Jose dos Campos Brazil