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Expected Impact of the Lunar Lander VLBI Observations on the Lunar Ephemeris Accuracy

Authors: M. V. Vasilyev, N. V. Shuygina, E. I. Yagudina

Journal: Transactions of IAA RAS vol. 40

Pages: 16 - 21

Year: 2017

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About the paper

Keywords: Lunar lander VLBI observations, Lunar ephemeris, LLR observations

The modern Lunar Ephemerides DE (USA), INPOP (France), EPM-ERA (Russia) have been obtained through the comparison of dynamical models of the Moon orbital and rotational motion with modern highly precise lunar laser observations (LLR) from 1969 to the present time. The main purpose of this paper is to evaluate the impact of adding new types of observations on the accuracy of lunar ephemerides. These types are VLBI and radio ranging observations of a lunar lander equipped with a transponder like the one in the Chinese space project Chang’E-3 with the Yutu rover placed at the Moon’s surface [1]. The evaluation was made through the mathematical simulation method for various radio telescopes networks and measurement accuracies. Mathematical models were created by the ERA system developed in the IAA RAS [2]. The results show that VLBI observations processing together with LLR can considerably improve the accuracy of some lunar parameters.