*Yajuan Li¹, Martyn Chipperfield^2,3, Wuhu Feng^2,4, Sandip Dhomse^2,3 (1.School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing, China, 2.School of Earth and Environment, University of Leeds, Leeds, UK, 3.National Centre for Earth Observation, University of Leeds, Leeds, UK, 4.National Centre for Atmospheric Science, University of Leeds, UK)