Influence of the layered Moon and Earth’s orientation on lunar rotation  

作　　者：Yong-Zhang Yang Jin-Song Ping Jian-Guo Yan Jin-Ling Li 

机构地区：[1]State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430070,China [2]Instituto de Astronomia y Ciencias Flanetarias de Atacama,Universidad de Atacama,Copayapu 485,Chile [3]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [4]Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China [5]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2020年第2期45-52,共8页天文和天体物理学研究（英文版）

基　　金：supported by LIESMARS Special Research Funding;the National Natural Science Foundation of China(U1831132,41590851,11373060,10973030 and 10778635);the State Key Project for Science and Technology(2015CB857101);National Astronomical Observatories,Chinese Academy of Sciences,a grant from the Hubei Province Natural Science(2018CFA087);Open Project of Lunar and Planetary Science Laboratory,Macao University of Science and Technology(FDCT 119/2017/A3);Open Funding of Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing(KF201813)

摘　　要：One of the most efficient ways to probe the lunar inner structure at present is through the study of its rotation.Range and range rate(Doppler) data between the Chang’E-3 lander and station on the Earth were collected from the beginning of the Chang’E-3 lunar mission in 2013.These observation data,taken together with the existing lunar laser ranging data,provide a new approach to extend research on the Earth-Moon system.The high precision of current observation data imposes exacting demands,making it necessary to include previously neglected factors.In this paper,motivated by progress of the Chinese lunar exploration project and to use its data in the near future,two lunar models:a one-layer model and a two-layer model with a fluid core,were applied to the rotational equations based on our implemented algorithm of the Moon’s motion.There was a difference of about 0.5′′in φ and ψ,but 0.2′′in θ between the two models.This result confirms that stratification of the inner structure of the Moon can be inferred from rotation data.We also added precise Earth rotation parameters in our model;the results show that this factor is negligible at present,due to the limited precision of the existing data.These results will help us understand the rotational process clearly and build a more realistic Earth-Moon model when we combine Lunar Laser Ranging data with high precision radio data to fit lunar motion in the near future.One of the most efficient ways to probe the lunar inner structure at present is through the study of its rotation.Range and range rate(Doppler) data between the Chang’E-3 lander and station on the Earth were collected from the beginning of the Chang’E-3 lunar mission in 2013.These observation data,taken together with the existing lunar laser ranging data,provide a new approach to extend research on the Earth-Moon system.The high precision of current observation data imposes exacting demands,making it necessary to include previously neglected factors.In this paper,motivated by progress of the Chinese lunar exploration project and to use its data in the near future,two lunar models:a one-layer model and a two-layer model with a fluid core,were applied to the rotational equations based on our implemented algorithm of the Moon’s motion.There was a difference of about 0.5′′in φ and ψ,but 0.2′′in θ between the two models.This result confirms that stratification of the inner structure of the Moon can be inferred from rotation data.We also added precise Earth rotation parameters in our model;the results show that this factor is negligible at present,due to the limited precision of the existing data.These results will help us understand the rotational process clearly and build a more realistic Earth-Moon model when we combine Lunar Laser Ranging data with high precision radio data to fit lunar motion in the near future.

关 键 词：MOON rotation model numerical integration Earth orientation parameters 

分 类 号：P184[天文地球—天文学]