Two-dimensional phase maps used for correcting the effects of static aberrations in the binary fitting. Top row: compares simulations of a perfect Airy pattern (left) to a static astigmatism with 180 nm rms over the full pupil. The white circle in the top right panel shows the extent of the measured phase maps. One example for such a map is shown below, before (left) and after (right) applying a Gaussian kernel accounting for atmospheric smoothing. The black line in the lower right panel indicates the trace where S2 was located, as predicted by the orbit.