1. Space Sciences Laboratory; University of California; Berkeley California USA
2. School of Physics; University of Sydney; Camperdown New South Wales Australia
3. School of Physics and Astronomy; University of Minnesota, Twin Cities; Minneapolis Minnesota USA
4. Department of Physics; University of Iowa; Iowa City Iowa USA
5. Los Alamos National Laboratory; Los Alamos New Mexico USA
6. Center for Solar Terrestrial Research, Department of Physics; New Jersey Institute of Technology; Newark New Jersey USA
7. Physics Department and Space Science Center; University of New Hampshire; Durham New Hampshire USA