Additional file 1 of A potential subsurface cavity in the continuous ejecta deposits of the Ziwei crater discovered by the Chang’E-3 mission
Creators: name: Chunyu Ding
name: Zhiyong Xiao
name: Su, Yan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 1. Text S1. FDTD simulations for the propagation of Chang’e-3 high-frequency LPR in regolith models that contain various-shaped subsurface cavities. In all the models simulated, untypical phase reversals occur in both the radargram and A-scan. Text S2. FDTD simulations for the propagation of Chang’e-3 high-frequency LPR in regolith models that contain subsurface cavities with different shapes and geometries. Text S3. Other structures of lunar regolith that contain subsurface cavities could form radargrams similar with the observation. Text S4. When building models to deduce the possible relative permittivity of the low-permittivity zone, the height of the low-permittivity zone needs to be adjusted according to the assumed relative permittivity. The basic geometry of the low-permittivity zone is referred from that shown in Figure 3f. Figure S1. Regolith models contain subsurface cavities with different roof geometries. Figure S2. Modeling radargram for typical lunar regolith that has an internal cavity with a shape followed by triangle. Figure S3. Phase reversals formed due to a subsurface cavity (inverse triangle in shape, but with various sizes) in regolith. Figure S4. Phase reversals formed due to a subsurface cavity (rectangular in shape, but with various sizes) in regolith. Figure S5. Phase reversals formed due to a subsurface cavity (trapezoid in shape, but with various sizes) in regolith. Figure S6. Phase reversals formed due to a subsurface cavity (inversed trapezoid in shape, but with various sizes) in regolith. Figure S7. Phase reversals formed due to a subsurface cavity (pentagon in shape, but with various sizes) in regolith. Figure S8. Phase reversals formed due to a subsurface cavity (inversed pentagon in shape, but with various sizes) in regolith. Figure S9. Phase reversals formed due to a subsurface cavity (ellipse in shape, but with various sizes) in regolith. Figure S10. Phase reversals formed due to a subsurface cavity (semi-ellipse in shape, but with various sizes) in regolith. Figure S11. Phase reversals formed due to a subsurface cavity (irregular polygon in shape, but with various sizes) in regolith. Figure S12. Alternative regolith models that contain subsurface cavities that can form similar radargrams with the observation. Figure S13. Schematic diagram showing depth estimation for the low-permittivity zone according to the assumed dielectric constant.