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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: A potential subsurface cavity in the continuous ejecta deposits of the Ziwei crater discovered by the Chang’E-3 mission

Fig. 2

Modeling radargram for typical lunar regolith that has an internal cavity. a The transmitted electromagnetic wave in our model is identical to the high-frequency LPR on the Yutu rover, and the bulk permittivity of typical lunar regolith is used in the model. The other model setups are introduced in "Method" section. b Simulated radargram. c Annotated positive and negative reflections following the phase reversals. d and e A-scan of reflections that are extracted along the dashed lines shown in panel c. The green and red arrows point to the positive and negative peak signals in the reflections, respectively

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