OMI/Aura UV product validation using NILU-UV ground-based measurements in Thessaloniki, Greece. - Zempila, Melina-Maria; Koukouli, Maria-Elissavet; Bais, Alkiviadis; Fountoulakis, Ilias; Arola, Antti; Kouremeti, Natalia; Balis, Dimitris (Atmospheric Environment, 2016)