The present paper deals with the impact of supercooled large droplets (SLD) at high velocity on walls of different characteristics (smooth/clean substrate vs. rough/iced surface resulting from continuous ice accretion). A visualization technique of the impact is presented to track and observe the splashing event over time. A focus is proposed on the characterization of the re-emitted droplets after the impact, especially on the particle size, velocity and ejection angle distributions. The experiments are conducted in the ONERA icing wind tunnel which allows to reach regimes where the Weber number is of the order of 160 000, which extends the range of velocities usually found in the literature to characterize the impact of SLD.