EARLINET correlative measurements for CALIPSO: First intercomparison results - Pappalardo, Gelsomina; Wandinger, Ulla; Mona, Lucia; Hiebsch, Anja; Mattis, Ina; Amodeo, Aldo; Ansmann, Albert; Seifert, Patric; Linné, Holger; Apituley, Arnoud (Journal of Geophysical Research: Atmospheres, 2010)