Study of African Dust with Multi-Wavelength Raman Lidar During “Shadow” Campaign in Senegal Igor Veselovskii, Philippe Goloub, Thierry Podvin, Valentyn Bovchaliuk, Didier Tanre, Yevgeny Derimian, Mikhail Korenskiy and Oleg Dubovik EPJ Web of Conferences, 119 (2016) 08003 Published online: 07 June 2016 DOI: 10.1051/epjconf/201611908003