Beamshift correction parameters as a function of the pointing (local sidereal time). Illustrated as example is the shift in X direction for camera 2 and 0 phase images. (A): Beamshift as measured in the unsaturated (ND2) PSF images. Different colour represent the different polarization images Q⁺, Q⁻, U⁺ and U⁻. (B): Analogous figure as measured in the coronagraphic images. The measurement accuracy is reduced especially for bad observing conditions. (C): Example for the iterative process of Gaussian process fitting and outlier detection to calculate the fit of this parameter for Q⁻.