Inferring the Shallow Layered Structure at the Chang’E-4 Landing Site: A Novel Interpretation Approach Using Lunar Penetrating Radar

Iraklis Giannakis*, Feng Zhou, Craig Warren, Antonios Giannopoulos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The current paper investigates the shallow layers of the lunar regolith at the Chang’E-4 landing site. Four layers between 0 and 10 m were identified using lunar penetrating radar. Based on these outputs, a revised stratigraphic model is suggested for the post-Imbrian ejecta at the Von Kármán crater. The layers were previously unseen due to the smooth boundaries between them. The revised model was inferred using an advanced hyperbola-fitting scheme. Applying conventional hyperbola-fitting to non-homogeneous media results in errors and inaccuracies that are often wrongly assumed to be negligible. We propose a novel hyperbola-fitting scheme that is, not constrained to homogeneous media and can be applied subject to any arbitrary one-dimensional permittivity distribution. Via this approach, we can estimate the permittivity profile of an investigated area and detect layered structures that were previously transparent to electromagnetic waves due to the gradational dielectric properties at their interfaces.

Original languageEnglish
Article numbere2021GL092866
Number of pages14
JournalGeophysical Research Letters
Volume48
Issue number16
Early online date12 Aug 2021
DOIs
Publication statusPublished - 28 Aug 2021

Keywords

  • Chang’E-4
  • ground penetrating radar (GPR)
  • hyperbola-fitting
  • lunar penetrating radar (LPR)
  • South-Pole Aitken (SPA)

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