Computational mesh used in the simulation model. The left panel shows the whole computational volume (view from top) comprised in an ellipsoid with 30 m and 25 m long semi-axes along the main X and Y axes (and 20 m semi-axes along Z). The right panel shows the surface mesh model of the Solar Orbiter with solar panels rotated at an angle of 79° to Sun normal, reflecting the actual geometry configuration at 0.3 AU. The SWA-EAS detector is modelled as a single sphere at the tip of the payload boom.