祝融号火星车次表层探测雷达有效探测深度
摘要
<p indent="0mm">On May 15, 2021, Tianwen-1’s lander, which was China’s first mission to Mars, successfully landed in the southern region of the Utopia Planitia (109.925°E, 25.066°N), located west of the Elysium Mons. Subsequently, the Mars rover named Zhurong was deployed and drove toward the south from the landing spot. The Mars Rover Penetrating Radar (RoPeR), aboard the Zhurong rover, facilitates on-site measurement of subsurface materials’ fine-scale structure and dielectric features though two different frequency channels. Channel one (CH-1) operates within 15 to <sc>95 MHz</sc> frequency range, whereas channel two (CH-2) operates at 0.45 to <sc>2.15 GHz.</sc> CH-1 revealed two sets of weak-to-strong reflection variation patterns in the radar image, suggesting the occurrence of episodic hydraulic flooding sedimentation. The Tianwen-1 landing site presents a larger heterogeneity in both the underground structure and the permittivity distribution by CH-2. It suggests that the space weathering degree (defined to include the continuous impact of large and small meteoroids and the steady bombardment of the surface by charged atomic particles from the sun and the stars) of the lunar regolith is higher than the Martian counterpart, which may be caused by the protection offered by the Martian atmosphere and the consequential fewer surface impacts compared to the Moon. The Subsurface Penetrating Radar carried by Zhurong rover serves as a crucial resource for examining the fine structure and physical properties of the superficial layer of Mars. It also aids in comprehending whether the water ice exists on this area. An extensive examination of RoPeR’s effective detection can assist in evaluating the effectiveness of its data, and in defining how near-surface materials on Mars scatter and absorb electromagnetic waves. In this context, this paper carries out a study of the effective depth of detection of RoPeR on Zhurong rover. Firstly, this paper establishes a relationshi