et al. 2010). These five measurements are organized as a cross, separated from each other by a distance of 17 m. Out of the five laser spots, we only used the laser spot #3, which has the advantage of providing altitude values on both the day and night side of the Moon (others are affected by an alignment problem that prevents measurements on the night side). The along-track point-to-point distance on the altimetry profiles is thus 57 m.