Accession Number : AD1003734

Title :   Retrieval of Droplet size Density Distribution from Multiple field of view Cross polarized Lidar Signals: Theory and Experimental Validation

Descriptive Note : Journal Article

Corporate Author : Defence Research Establishment Valcartier Quebec Canada

Personal Author(s) : Roy,Gilles ; Bisonnette,Luc ; Bastille,Christian ; Vallee,Gilles

Full Text :

Report Date : 02 Jun 2016

Pagination or Media Count : 13

Abstract : Multiple-field-of-view (MFOV) secondary-polarization lidar signals are used to calculate the particle-size density distribution (PSD) at the base of a cloud. At the cloud base, multiple scattering is weak and single backscattering is predominant by many orders of magnitude. Because secondary polarization is a direct measure of multiple scattering, it is therefore advantageous to use secondary polarization. A mathematical relation among the PSD, the lidar fields of view, the scattering angles, and the angular depolarization is derived to facilitate use of secondary polarization. The model is supported by experimental MFOV lidar measurements carried out in a controlled environment, and its limitations arid restrictions are discussed.

Descriptors :   REMOTE SENSING , LASER DETECTION , clouds , Particle size , Backscattering , Density , Polarization , models

Distribution Statement : APPROVED FOR PUBLIC RELEASE