“…Quantitative measurements of the wavefront distortions and of the modulations transfer function (MTF) will be presented. Additionally outdoor experiments were realized on a free space propagation test range to investigate the influence of volume distributed turbulence on the performance of the layer oriented adaptive optics [5]. To cumulate sufficient phase sufficient phase distortion along the horizontal propagation length of 130m the beam path was located 1.2 m over ground.…”