Multiple-Wavelength Aerosol Lidar

摘要

A multiple-wavelength lidar has been developed. It is capable of simultaneously emitting laser pulses at 355, 400, 532, 710, 800, 1064nm. From the detected signals vertical profiles of backscatter coefficients at six wavelengths, the extinction coefficient and the depolarization-ratio at 532 nm, and the water-vapor mixing ratio can be determined. Under the assumption of Mie theory a data-evaluation algorithm based on the concept of inversion via regularization has been designed to determine height-resolved profiles of mean particle size-distribution parameters from the set of simultaneously measured optical backscatter and extinction data.