h

Prospect for Measuring Lunar Tidal Deformation and Displacement Love Numbers With Earth-Based Radar.

Gen Li,Zegang Ding, Zihan Hu, Yifan Wang,Zehua Dong,Tao Zeng

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens.(2024)

引用 0|浏览2
暂无评分
摘要
Lunar tidal deformation (LTD), characterized by the vertical ( h 2 ) and horizontal ( l 2 ) displacement Love numbers, is a key to deciphering the interior structure of the Moon. However, the small deformation amplitude of only up to 10 cm makes their measurements very challenging. In this paper, we propose a novel method named Earth-based repeat-pass SAR interferometry (EBRP-InSAR) to measure the LTD and displacement Love numbers. We analyzed the potential and performance of EBRP-InSAR in detail based on LTD model and existing planetary radar capabilities. The error budget and simulation results show that the relative measurement accuracy of LTD could be better than 2 mm. Furthermore, compared with Lunar Laser Ranging (LLR) and Lunar Orbiter Laser Altimeter (LOLA), the two-pass EBRP-InSAR can not only directly estimate h 2 but also l 2 with accuracies better than 10 -3 and 10 -4 , respectively, which is comparable that of LLR and LOLA methods. In addition, through long-term time-series observations, it will be possible to assess the spatial inhomogeneity of LTD response to the forcing potential in the near side with time-series EBRP-InSAR. After spatial smoothing, a space variation as small as on the order of 10 -4 and 10 -5 in h 2 and l 2 , respectively, can be distinguished on the lunar near side. As another measurement technology independent of LLR and LOLA, the EBRP-InSAR is expected to explain the difference between the observations from LLR and LOLA and the modeled lunar interior structure, and firstly estimate the lunar horizontal displacement Love number.
更多
查看译文
关键词
Earth-based radar,Moon,Repeat-pass,Interferometry,Spatial and temporal baseline
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要