Simulation and processing of LPR onboard the rover of Chang'E-3 mission: Based on multilayer lunar regolith structure stochastic media model

Abstract

Lunar Penetrating Radar (LPR), equipped on the rover of Chang'E-3 mission (CE-3), estimates the thickness of lunar shallow structure and detects three layers structure. In order to analyze the data of LPR and build an interpretation and experimental model, in this paper, we carry out LPR simulation and processing algorithm to provide some reference for future LPR detection. Firstly, we build the stochastic media model of lunar near surface with mix Gaussian auto-correlation function based on CE-3 LPR data. The medium parameters come from data of Apollo 15, which is the nearest to the landing site of CE-3. Then, the lunar model is simulated by the finite difference time domain (FDTD) method. We also consider the effect of interference wave from topographic and Yutu rover. Lastly, in order to eliminate the clutter wave due to Yutu rover, we use radon transform (RT) to reduce the clutter. We can obtain high resolution subsurface structure from processing results. In this paper we provide techniques for LPR data processing and interpretation in future moon probe projects.