AIAS is a mobile depolarization lidar employed for detecting the polarized and cross polarized backscattered lidar signals at 532 nm, to further characterize the shape of the sampled particles. It provides the aerosol backscatter coefficients at 532 and 1064 nm, as well as the linear particle depolarization ratio (LPDR) at 532 nm, from 0.3-8 km asl. The calibration technique applied in this system is the ±45o calibration method, introduced by Freudenthaler et al. (2009).