Visualisation of the relative variation of R² and e over the VIS focal plane, +X to the right and +Y going up. The values have been normalised by the average of the nine values, with an average R² of 0.0479 and 0.0199 arcsec² and an average e of 0.025 and 0.021 for the STOP and in-orbit data, respectively. The difference between the values are due to the use of a different Gaussian weighting in the calculation of the moments (see Sect. 5.3.2). The squares mark the reference positions on the FPA where the values have been obtained. Left diagrams: relative R² (top) and e (bottom) predicted by the STOP analysis. Right diagrams: relative R² and e measured in orbit in November 2023.