The method of estimation of C_n~2 of laser mixture turbulent flow is proposed based on experimental dependencies of amplitude of gas pulsation on spatial pulsation scale. The connection between degree of nonequilibrium and C_n~2 magnitude is shown. The boundaries of inertial and viscosity ranges are determined. The estimation of C_n~2 is within (3-14). 10~(15) cm~(-2/3) as dependence of gas- discharge current.
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