Estimation of parameters of a space spectrum of the turbulence medium

Tatiana A. Sheremetieva

doi:10.1117/12.438178

4 September 2001 Estimation of parameters of a space spectrum of the turbulence medium

Tatiana A. Sheremetieva

Proceedings Volume 4376, Laser Weapons Technology II; (2001) https://doi.org/10.1117/12.438178
Event: Aerospace/Defense Sensing, Simulation, and Controls, 2001, Orlando, FL, United States

Abstract

The method which defines the space spectrum parameters of the turbulent medium is presented. The experiment laser beams distribution with various diameters and at different wavelengths are used to define the spectrum parameters. The relation between the value of dispersion of gravity center wandering of the laser beam and the function of correlation of intensity in the observation plane is used. The method consists in estimating the correlation function of intensity distribution and the value of dispersion of gravity center wandering of the laser beam in the observation plane using the experimental data and the solution of the system of equations. The system of equation is made on the basis of an analytical relation between this dispersion and this correlation function. This method has been used to process the data of numerical experiment. These results proved to be good. From the data about the intensity distribution of two laser beams with various diameters obtained in physical experiment, the structural characteristic of refractive index and the outer scale Lo are obtained. The method is universal in that it allows one to use the beams with an arbitrary distribution of intensity at the input of turbulent. The comparison between the results of physical experiment and numerical experiment for which the spectrum parameters have been recovered by the described method is performed. The characteristics of intensity distribution are shown to be close.

Citation Download Citation

Tatiana A. Sheremetieva "Estimation of parameters of a space spectrum of the turbulence medium", Proc. SPIE 4376, Laser Weapons Technology II, (4 September 2001); https://doi.org/10.1117/12.438178

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KEYWORDS

Turbulence

Atmospheric optics

Error analysis

Correlation function

Refractive index

Data centers

Numerical analysis

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