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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

From: Compositional variations along the route of Chang’e-3 Yutu rover revealed by the lunar penetrating radar

Fig. 2

Radargram obtained by the high-frequency LPR from the navigation points N105 to N208. The two-way travel time of the electromagnetic wave is shown in the right y-axis. a The final-processed radargram. The left y-axis is the depth corresponding to an assumed dielectric constant of 1. b Interpretations of subsurface structure of the radargram. The solid green lines are uneven reflectors that are interpreted as the boundary between the ejecta deposits of Ziwei and deeper more competent materials (e.g., Xiao et al. 2015; Fa et al. 2015). The dashed pink lines mark the approximate boundary where the signal transition is not obvious. The distance values shown in the lower panel are from ~ 33.2 to 107.4 m that are the route lengths from the landing site. The left y-axis mark depths that correspond to an assumed dielectric constant of 3.2 (Fa et al. 2015)

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