Abstract
The effect of scintillations on the curvature sensing which is used in astronomic adaptive systems is investigated. It is shown that the magnitude of the effect depends on two atmospheric turbulence parameters: on the Fried parameter which characterizes the seeing conditions, and on the turbulence inner scale which is responsible for small-sized turbulence inhomogeneities. Depending on the turbulence conditions, the magnitude of the effect ranges from 3% to 20%, while for the typical ones it is of the order of 10%-15%.
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