Fig. 1. Schematic birds eye view of the optical setup, with rays originating from the central GS.

Fig. 2. a) Sample of optical path difference from PS2 given in radians, with distance r scaled to parent version. b) Obtained structure function D_Φ from PS2, averaging over 10 measurements (blue) compared to the Kolmogorov structure function D_Φ=k·r^5/3 (green).

Fig. 3. Average PSFs from the experiment. Case a) is uncorrected, b) is corrected with conventional AO, c) is field averaged conventional AO and d) is dual-conjugate AO. The intensity I_N is normalised with the central intensity of the diffraction-limited PSF. The axes of the PSFs are the relative coordinates in arc seconds, scaled to the parent version.

Fig. 4. Comparison of the experimental results with a Zemax model of the experiment. The black curves depict the Strehl ratio as function of angle, α, from the central guide star in the parent experiment with error intervals marked in green or blue. The red dots are the experimental values including error bars. Case a) is uncorrected, b) is corrected with conventional AO, c) is field averaged conventional AO and d) is dual-conjugate AO. The green families resulted from running the optimization routine a single time, and the blue family resulted from running it 10 times. See text for more explanation.