1. Bartol Research Institute and Department of Physics and Astronomy; University of Delaware; Newark Delaware USA
2. Physics Department; Shinshu University; Matsumoto Japan
3. Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
4. Australian Antarctic Division; Kingston, Tasmania Australia
5. School of Mathematics and Physics; University of Tasmania; Hobart, Tasmania Australia
6. National Institute for Space Research; Sao Jose dos Campos, Santa Maria Brazil