On the technique for the recovery of the spectrum of turbulence in   astrophysical disks
  We present a method that can be used to recover the spectrum of turbulence from observations of optically thin emission lines formed in astrophysical disks. Within this method we analyze how line intensity fluctuations depend on the angular resolution of the instrument, used for the observations. The method allows us to restore the slope of the power spectrum of velocity turbulent pulsations and estimate the upper boundary of the turbulence scale. 
D. V. Bisikalo, E. P. Kurbatov, Ya. N. Pavlyuchenkov, A. G. Zhilkin   and P. V. Kaygorodov
astro-ph.IM