The normalized temporal autocorrelation function of fluctuations of the scattered radiation of a focused laser beam (0.63 mm) in the surface atmosphere in rain, drizzle, fog, and haze

2016 ◽  
Keyword(s):  
Laser Beam ◽  
Autocorrelation Function ◽  
Scattered Radiation ◽  
Surface Atmosphere ◽  
Temporal Autocorrelation

Temporal autocorrelation function for a diffusing-wave spectroscopy experiment with a point source and backscattering detection

2001 ◽  
Vol 40 (24) ◽  
pp. 4204 ◽  
Author(s):  
Carlos Rega ◽  
Christopher J. Lloyd ◽  
David Attwood ◽  
David Clarke ◽  
Pauline Geraghty
Keyword(s):  
Point Source ◽  
Autocorrelation Function ◽  
Diffusing Wave Spectroscopy ◽  
Temporal Autocorrelation ◽  
Spectroscopy Experiment

Fluctuations of the intensity of a spotty picture of scattered radiation of a focused laser beam in snowfall

1984 ◽  
Vol 5 (1) ◽  
pp. 85-87
Author(s):  
N. A. Vostretsov ◽  
A. F. Zhukov ◽  
M. V. Kabanov ◽  
R. Sh. Tsvyk
Keyword(s):  
Laser Beam ◽  
Scattered Radiation

scholarly journals Algorithm for Estimating the Laser Beam, Matrix Photo Receiver on the Background of the Gaussian Noise Using Full Sufficient Statistics of the Received Scattered Radiation

2021 ◽  
pp. 265-271
Author(s):  
Yuri L. Koziratsky ◽  
Roman G. Khilchenko ◽  
Ruslan E. Merkulov ◽  
Anton A. Koziratsky
Keyword(s):  
Parameter Estimation ◽  
Laser Radiation ◽  
Laser Beam ◽  
Gaussian Noise ◽  
Scattered Radiation ◽  
Finite Sample ◽  
Sufficient Statistics ◽  
Distribution Parameters ◽  
Photo Receiver

An algorithm for estimating the position of the laser beam by the component scattered in the atmosphere by a matrix photodetector against a background of Gaussian noise is developed. The algorithm is based on the Lehman-Scheffe theorem, which allows one to obtain effective estimates of the distribution parameters using complete sufficient statistics for reports of the observed implementation of scattered laser radiation. The obtained estimates provide the best quality of parameter estimation for any finite sample sizes and do not require additional studies

Two-Dimensional Radiative Back-Scattering From Optically Thick Media

1986 ◽  
Vol 108 (3) ◽  
pp. 619-625 ◽  
Author(s):  
H. F. Nelson ◽  
D. C. Look ◽  
A. L. Crosbie
Keyword(s):  
Laser Beam ◽  
Scattered Radiation ◽  
Water Solution ◽  
Index Of Refraction ◽  
Isotropic Scattering ◽  
Scattering Medium ◽  
Back Scattering ◽  
Scattering Centers ◽  
Optical Radius ◽  
Good Agreement

The theoretical and experimental results of anisotropic back-scattering from an optically thick medium exposed to a laser beam are presented. The laser beam is incident normal to the upper surface of the scattering medium. Uniformly sized latex particles with diameters ranging from 0.046 to 0.35 μm are used for the scattering centers in a water solution. The results are discussed for back-scattered radiation as a function of optical radius from the laser beam and optical thickness of the scattering medium. It is shown that back-scattered radiation in optically thick media is very sensitive to small changes in albedo when the albedo is near unity. The sensitivity increases as the optical radius increases. Also, the isotropic scattering solution yields good agreement with the experimental data at large optical radii when one uses effective optical properties. The agreement between theory and experiment is improved when index of refraction effects at the interface are included.

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