Median seeing SAXO+ simulation with the iMZ as a second stage WFS. The upper graph shows the evolution of phase residual variance (in logarithmic scale) over 1000 correction iterations (loop frequency = 1 kHz) for N = 3 photons/pixel/frame (blue curve). The evolution of phase residual variance after SAXO is overplotted in black (loop frequency = 150 Hz for N = 5 photons/pixel/frame). The lower pictures show residual phase maps and short-exposure focal plane images (log scale) at the beginning and at the end of the one second sequence.