First validation of GOME-2/MetOp Absorbing Aerosol Height using EARLINET lidar observations - Konstantinos, Michailidis; Koukouli, Maria-Elissavet; Siomos, Nikolaos; Balis, Dimitrios; Tuinder, Olaf; Tilstra, Gijsbert; Mona, Lucia; Pappalardo, Gelsomina; Bortoli, Daniele (2021)