1. School of Physics Henan Normal University Xinxiang China
2. State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing China
3. Cooperative Institute of Research in Environmental Sciences & Department of Aerospace Engineering Sciences University of Colorado Boulder Boulder CO USA
4. College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan China
5. School of Chemistry University of Leeds Leeds UK
6. National Centre for Atmospheric Science (NCAS) University of Leeds Leeds UK