Beghi, Alessandro - Cenedese, Angelo - Masiero, Andrea On the estimation of atmospheric turbulence layers for AO systems. [Contributo a convegno] In: European Control Conference ECC13, 16-19 July 2013, Zurich, Switzerland.
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In current and next generation of ground telescopes, Adaptive Optics (AO) are employed to overcome the
detrimental effects induced by the presence of atmospheric
turbulence, that strongly affects the quality of data transmission and therefore limits the actual resolution of the overall system.
The analysis as well as the prediction of the turbulent phase
affecting the light wavefront is therefore of paramount impor-
tance to guarantee the effective performance of the AO solution.
In this work, a layered model of turbulence is proposed, based on the definition of a Markov-Random-Field whose parameters are determined according to the turbulence statistics. The problem of turbulence estimation is formalized within the stochastic framework and conditions for the identifiability of the turbulence structure (numbers of layers, energies and velocities) are stated. Finally, an algorithm to allow the layer detection and characterization from measurements is designed. Numerical simulations are used to assess the proposed procedure and validate the results, confirming the validity of the approach and the accuracy of the detection.
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