Studies on Aerosol Optical Properties at High Altitude Station in Western Himalayas Using Raman Lidar Shishir Kumar Singh, Jaswant, S.R. Radhakrishnan, Davender Sethi and Chhemendra Sharma EPJ Web Conf., 237 (2020) 02034 Published online: 07 July 2020 DOI: 10.1051/epjconf/202023702034