by the median curves. Whereas the MAS increases when baseline decreases, the MDS of the rough lunar terrains shows a non-monotonic behavior, with a maximum MDS of 1.51 at a baseline of 10 km and decreasing values of MDS toward both larger and shorter baseline. In the case of Mercury’s highlands, it is possible that such a maximum of MDS also exists around a shorter baseline of about 2 km but MDS values at lower baselines would be necessary to confirm this trend. For Mars, the conver- sion from absolute to differential slope results in a quasi- disappearance of the scale-dependency of roughness, with a nearly constant MDS value between 0.21 and 0.31 for baselines between 0.6 and 100 km.