The primary goal of the MULTIPLY development is at airborne high spectral resolution lidar (HSRL) measurements of the atmospheric aerosol extinction, backscatter and depolarization profiles in IR, VIS and UV spectral range.
Challaging is to achieve a sufficient HSRL splitting efficiency of the aerosol line and the Cabannes spectra when implementing Fabry-Pérot interferometers to allow unbiased measurements of molecular signal in aerosol and clouds. A sequential filtering can be applied to achive sufficent suppression. In IR spectral range, such filtering allow measurements in aerosol layers. In VIS range as well, however here a preference to the less complex iodine technique is given. In UV spectral range, sufficient suppresion can be archived even in clouds. I the name of the MULTIPLY team, I shall introduce the project, its aims, and report on the current progress.

The MULTIPLY lidar is under development in a scientific European collaboration of following institutions:
The Atmosphere in the Earth System at Max Planck Institute for Meteorology (Hamburg, Germany), National Institute of Research and Development for Optoelectronics (Magurele, Romania), National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Application and Remote Sensing (Athens, Greece), and University of Warsaw, Faculty of Physics, Institute of Geophysics (Warsaw, Poland). The MULTIPLY lidar is developed for installation onboard of a Hawker Beechcraft King Air C90-GTx aircraft of National Institute for Aerospace Research "Elie Carafoli" (Bucharest, Romania)."