1. School of Mathematical Sciences, University of Adelaide , Adelaide, SA 5005, Australia
2. National Institute for Space Research (INPE) , P.O. Box 515, São José dos Campos, São Paulo 12227-010, Brazil
3. Aeronautics Institute of Technology (ITA) , São José dos Campos, São Paulo 12228-900, Brazil
4. Plasma Dynamics Group, Department of Automatic Control and Systems Engineering, University of Sheffield , Sheffield S1 3JD, UK
5. Instituto de Astrofísica de Andalucía (IAA-CSIC) , Apartado de Correos 3004, E-18080 Granada, Spain
6. Lockheed Martin Solar and Astrophysics Laboratory , Palo Alto, CA 94304, USA
7. Bay Area Environmental Research Institute , Moffett Field, CA 94035, USA