Low-energy ion event as seen in the solar wind reference frame. From top to bottom: EPT Sun, Asun, North, and South telescopes. Top panel: Compton-Getting corrected ion intensities for each energy channel. Bottom panel: μ of the centre of the look direction of the FoV in the SC-centred frame, μ_SC (black trace), and in the solar wind frame, μ (orange trace). In the latter case, μ corresponds to the third energy channels. Grey dots indicate the polarity of the IMF (1 anti-sunward, -1 sunward).