1. Ground-based validation of spaceborne lidar measurements (M. Proestakis, V. Amiridis)
2. Remote sensing for assimilation and validation of dust forecasts (S. Solomos)
3. The Skynet network (M. Campanelli)
4. GRASP/GARRLiC (A. Lopatin)
5. PM monitoring from space (M. Tesche)
6. Aerosol optical depth ground-based sensors, homogenization activities between different networks (S. Kazadzis)
7. ACTRIS, The ground-truth for aerosols, clouds, and trace gases (D. Nicoale)
8. Airborne lidar for satellite cal/val (aerosols and clouds) (F. Marenco)
9. 25 years:From manual inversion of prototype Raman lidar to automated, unsupervised inversion of airborne MWL HSRL (D. Muller)
10. CALIPSO validation with airborne in-situ and lidar measurements:Tackling the problem of hygroscopic growth (A. Tsekeri)