Elastic Scattering Time–Gated Multi–Static Lidar Scheme for Mapping and Identifying Contaminated Atmospheric Droplets

Numerical simulations are performed to determine the angular dependence of MIe scattering cross-section intensities pure water droplets and pollutants such as contaminated black carbon a function wavelength incident laser light, complex refractive index, size scatterer. Our results show distinct features when varying various parameters, thereby allowing identification particle with specific application atmospheric including carbon. Regardless type scatterer, intensity is nearly uniform slight preference for forward within 20% laser’s wavelength. The patterns start exhibit distinguishable parameter equals 1.77, corresponding an 0.355 μm radius 0.1 μm. then become increasingly unique increases. Based on these calculations, we propose time-gated lidar scheme consisting multiple detectors that can rotate through telescopic angle be placed equidistantly around particles collect backscattered light commercially available Q-switched system emitting at tunable wavelengths. By using pulsed 10-ns pulse duration, our could distinguish centers least 3 m apart. called Scattering Time-gated multi-Static LIDAR (MISTS–LIDAR) would capable identifying pollutant mapping its location spatial resolution few meters.