1. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
2. Max Planck Institute for Solar System Research; Göttingen Germany
3. College of Earth Sciences; University of Chinese Academy of Sciences; Beijing China
4. Department of Earth and Environmental Sciences; Ludwig-Maximilians University; Munich Germany
5. Centre for Space and Atmospheric Research and Department of Physical Sciences; Embry-Riddle Aeronautical University; Daytona Beach Florida USA
6. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA