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Progress in Earth and Planetary Science
Fig. 5 | Progress in Earth and Planetary Science

Fig. 5

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

Fig. 5

a The relationship between the different loss tangent and the penetration depth of the high frequency channel (Xing et al. 2017). The pink, green and blue lines show the electromagnetic wave propagation in media that have a relative permittivity of 2.3, 2.9, and 3.5, respectively. The red dashed line shows the position of our estimated average loss tangent, and the rest two dashed lines correspond to the lower and upper limits of our estimated loss tangent, respectively. b The estimated content of TiO2 + FeO from the navigation points N105 to N208 along the route of Yutu. c An interpolated trend map for the content of TiO2 + FeO in the traverse region of Yutu. This map is based on the measurement shown in panel b using a natural neighbor interpolation method. The base map of the main frame is obtained by the Lunar Reconnaissance Orbiter (M102285549LE + RE; 1.66 m/pixel), and that for the inset is obtained by the descent camera onboard the CE-3 lander (image ID CE3_BMYK_LCAM-3006)

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