Fig. 1: Geomorphological context of the Chang’E-4 landing site at different scales.
From: Lunar rock investigation and tri-aspect characterization of lunar farside regolith by a digital twin
a The shaded relief of the region around the Von Kármán crater derived from the Lunar Reconnaissance Orbiter (LRO) + Laguya merged topography products. b Yutu-2 rover’s traverse map and rock investigation sites during the first 41 lunar days. The base map is a high-resolution (0.9 m per pixel) digital orthophoto map (DOM) obtained by the Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) (M1303619844 L/R and M1303640934 L/R). These insets are the associated rock targets shown in Pancam images. c Local landform of the Longji site seen in the panoramic image taken at the dormant point of the 41st lunar day. The inset was taken by the Pancam at the forenoon of the 41st lunar day before the investigation. d The planned path of Yutu-2 to approach the exposed rock. The path consists of three curved movement sections divided by points 1–4, and their lengths (curvature) are 3.673 m (0.154 m−1, green curve starting from point 1 to point 2), 4.282 m (−0.132 m−1, yellow curve starting from point 2 to point 3), and 1.852 m (−0.138 m−1, blue curve starting from point 3 to point 4). The rock target in subfigure d is the same one as labeled in subfigure (c). The crater outlined by a dotted circle in subfigure (d) is the one labeled with a 7.5 m diameter in subfigure (c).
