Penumbra lunar eclipse observations reveal anomalous thermal performance of Lunakhod 2 reflectors

作     者：Tian-Quan Gao Cai-Shi Zhang Hong-Chao Zhao Li-Xiang Zhou Xian-Lin Wu Hsienchi Yeh Ming Li 高添泉;张才士;赵宏超;周立祥;吴先霖;叶贤基;李明

作者机构：MOE Key Laboratory of TianQin MissionTianQin Research Center for Gravitational Physics&School of Physics and AstronomyFrontiers Science Center for TianQinCNSA Research Center for Gravitational WavesSun Yat-sen University(Zhuhai Campus)Zhuhai 519082China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第5期

页      面：212-218页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 0803[工学-光学工程] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.12033009) 

主　　题：lunar laser ranging corner-cube reflector arrays dihedral angle errors penumbra lunar eclipse 

摘      要：As the signal reflected by the corner-cube reflector arrays is very weak and easily submerged during the full moon,we analyze the influence of the thermal effect of corner-cube reflector arrays on the intensity of lunar laser ranging *** ranging measurements during the penumbra lunar eclipse verify suspected thermal deformation in the Lunakhod 2 *** levels vary over two orders of magnitude as the penumbra eclipse *** can be explained by the change in the dihedral angle of the corner-cube reflectors caused by the *** results show that when the dihedral angle errors reach 1,the energy is reduced by 100 times compared with the ideal corner-cube *** the experiment,our findings suggest that when the corner-cube reflector arrays enter the penumbra of the earth,the effective echo signal level which reaches 0.18 photons/s far exceeds the historical level of the full ***,11 minutes after the penumbra lunar eclipse,the effective echo rate of Lunakhod 2 will drop two orders of *** mechanism can explain the acute signal deficit observed at full moon.