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Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 33
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
Nianwen Cao et al., Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-002
T
his paper presents a method to obtain the aerosol lidar ratio and particle
spectrum simultaneously using a dual-wavelength lidar when the aerosol
particles meet the Junge distribution. It analyzes the relationship between
the aerosol particle ratio, particle spectrum and particle complex refractive
index. The results show that the particle properties will have a great impact
on the lidar ratio. If the selected lidar ratio is not suitable, the two-wavelength
extinction coefficient obtained from the Fernald method is directly used for
inversion of the particle spectrum, which will cause great uncertainty. In this
paper, a lidar ratio iteration method is introduced to solve the influence of
improper lidar ratio selection on particle spectrum inversion, then conducted
simulation calculations and analysis. The simulation results show that the
lidar ratio iteration method effectively solves the problem of uncomfortable
lidar ratio selection, and can obtain relatively accurate lidar ratio and particle
spectrum parameters at the same time.
Biography
Nianwen Cao has completed his PhD from Anhui Institute of
Optics and Fine Mechanics, Chinese Academy of Sciences, in
1999. He is Professor and engaged in Atmospheric Remote
Sensing Research by Lidar in Nanjing University of Information
Science and Technology. He has published more than 30 pa-
pers in reputed journals.
nwcao@nuist.edu.cnIterative method of dual-wavelength laser ratio for particle
spectrum
Nianwen Cao and Sipeng Yang
Nanjing University of Information Science and Technology, China