1. Space Science Center University of New Hampshire Durham New Hampshire USA
2. Now at Space Science and Engineering Division Southwest Research Institute San Antonio Texas USA
3. Now at Department of Physics and Astronomy University of Texas at San Antonio San Antonio Texas USA
4. National Space Science Center Chinese Academy of Sciences Beijing China
5. Max‐Plank‐Institut für Extraterrestrische Physik Garching Germany
6. Space Sciences Division Rutherford Appleton Laboratory Oxfordshire UK
7. Swedish Institute of Space Physics (IRF) Uppsala Sweden
8. Los Alamos National Laboratory Los Alamos New Mexico USA