Standoff determination of the particle size and concentration of small optical depth clouds based on double scattering measurements: concept and experimental validation with bioaerosols.
A multiple-field-of-view (MFOV) lidar is used to characterize size and optical depth of low concentration of bioaerosol clouds. The concept relies on the measurement of the forward scattered light by using the background aerosols at various distances at the back of a subvisible cloud. It also relies on the subtraction of the background aerosol forward scattering contribution and on the partial attenuation of the first-order backscattering. The validity of the concept developed to retrieve the effective diameter and the optical depth of low concentration bioaerosol clouds with good precision is demonstrated using simulation results and experimental MFOV lidar measurements. Calculations are also done to show that the method presented can be extended to small optical depth cloud retrieval.
Roy
Gilles
G
Defence Research Development Canada Valcartier, 2459 Pie XI Boulevard North, Québec, Canada. gilles.roy@drdc-rddc.gc.ca
Roy
Nathalie
N
D000336:Aerosols; D001703:Biophysics / Q000379:methods; D003198:Computer Simulation; D004867:Equipment Design; D007834:Lasers; D008027:Light; D015233:Models, Statistical; D055095:Optics and Photonics; D010316:Particle Size; D012031:Refractometry; D015203:Reproducibility of Results; D012542:Scattering, Radiation
D000336:Aerosols