A progress report of Ozone Lidar Station in L'Aquila (SLAQ) is presented. We extensively describe the experimental system and the recent upgrading; details about inversion of data are also given. We show some
preliminary ozone profiles which have been obtained at SLAQ and these measurements are discussed within the algorithm validation. In conclusion the data validation for the use in trajectory data analysis is also discussed.PublishedPorano1.8. Osservazioni di geofisica ambientaleope