Express analysis of turbulence parameters
The estimation technique for the outer scale <i>L</i><sub><i></i>0</sub><i> </i>and the index structure constant <i>C</i><sup><i>2</i></sup><sub><i>n</i></sub><i> </i>of atmospheric turbulence in the case of Shack-Hartmann measurements of phase fluctuations of a light wave propagated through atmosphere is described. The technique is based on the Zernike expansion of phase fluctuations at the optical aperture and analyses of this expansion coefficients statistics. Values of turbulence parameters in the water cell obtained with this technique are in a good agreement with the results reported by other authors.