Particle_number_size_distribution and aerosol light scattering at DEM_Athens. These measurements are gathered as a part of the following projects ACTRIS, ACTRIS_preliminary, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aerosol_light_backscattering_coefficient in pm10, aerosol_light_backscattering_coefficient in pm10, aerosol_light_backscattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10, particle_number_size_distribution in pm10, particle_number_size_distribution in pm10, particle_number_size_distribution in pm10