1. Department of Physics and Astronomy University of Iowa Iowa City IA USA
2. Korea Astronomy and Space Science Institute Daejeon South Korea
3. School of Space Research Kyung Hee University Yongin South Korea
4. Institute for Physical Science and Technology University of Maryland College Park MD USA
5. Department of Space Physics, IAP CAS Prague Czech Republic
6. Faculty of Mathematics and Physics Charles University Prague Czech Republic
7. Department of Physics Lancaster University Lancaster UK