Validation of ASH Optical Depth and Layer Height from IASI using Earlinet Lidar Data D. Balis, N. Siomos, M. Koukouli, L. Clarisse, E. Carboni, L. Ventress, R. Grainger, L. Mona and G. Pappalardo EPJ Web of Conferences, 119 (2016) 07006 Published online: 07 June 2016 DOI: 10.1051/epjconf/201611907006