1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, China
2. Middle Atmosphere and Global environment Observation (LAGEO) Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
3. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China
4. School of Engineering, University of Mount Union, Alliance, OH, USA
5. Department of Applied Informatics Silesian, University of Technology Akademicka, Gliwice, Poland
6. School of Electronic Engineering and Computer Science, Queen Mary University of London, London, U.K.