Lim Hwee San is currently working as Principal investigator of the Malaysia-Penangs site for NASAs Sun Photometer Network AERONET as well as a participant to the field campaign, Distributed Regional Aerosol Gridded Observation Networks (DRAGON) Southeast Asia 2012 and the Seven South East Asian Studies (7SEAS) mission. She completed her PhD under the supervision of Prof. Dr. Mohd. Zubir Mat Jafri and Assoc. Prof. Dr. Khiruddin Abdullah in 2006 at USM in environmental remote sensing. Her prior wok experience includes lecturer at University Sains Malaysia (USM) after obtaining a PhD degree. Her research interests includes optical remote sensing (both passive and active) and digital image processing, particularly to spectral image data and modelling optical properties of atmospheric aerosols. Her current focus is on the applications of ground-based LIDAR and satellite-based LIDAR (e.g., CALIPSO, AIRS) data for air pollution and greenhouse effects. She published more than 320 articles in the above mentioned areas. She also published five chapters of a book and four monographs. She published 18 articles in National and International journals.