| Autor: |
de Guélis, Thibault Vaillant, Schwarzenböck, Alfons, Shcherbakov, Valery, Gourbeyre, Christophe, Laurent, Bastien, Dupuy, Régis, Coutris, Pierre, Duroure, Christophe |
| Předmět: |
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| Zdroj: |
Atmospheric Measurement Techniques Discussions; 2018, p1-26, 26p |
| Abstrakt: |
Optical array probes (OAPs) are classical instrumental means to derive shape, size, and number concentration of cloud and precipitation particles from 2D images. However, recorded 2D images are subject to distortion based on the diffraction of light when particles are imaged out of the object plane of the optical device. This phenomenon highly affects retrievals of microphysical properties of cloud particles. Previous studies of this effect mainly focused on spherical droplets. In this study we propose a theoretical method to compute diffraction pattern of all kind of cloud particle shapes in order to simulate the response recorded by an OAP. To check the validity of this method, a series of experimental measurements have been performed with a 2D-S probe mounted on a test bench. Measurements are performed using spinning glass discs with imprinted non-circular opaque particle shapes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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