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Combination of Lunar Laser Ranging and Differential Lunar Laser Ranging

Zhang, Mingyue and Müller, Jürgen and Biskupek, Liliane and Singh, Vishwa Vijay (2022) Combination of Lunar Laser Ranging and Differential Lunar Laser Ranging. 22nd International Workshop on Laser Ranging, 2022-11-07 - 2022-11-11, Guadalajara, Spanien.

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Lunar laser ranging (LLR), i.e., range measurements from an Earth station to a lunar reflector, is carried out for more than 53 years. LLR is important for many fields, e.g., lunar ephemeris, relativity tests and lunar interior modelling. However, due to the limited LLR accuracy related to the challenging tracking conditions, the small number of received photons, the Earth's atmosphere, etc., it is difficult to achieve real breakthroughs for a better understanding of certain parts of the Earth-Moon system, e.g., the lunar interior. In future, an upgraded station with a high-power continuous wave laser at Table Mountain Observatory of JPL will enable a new technique for lunar tracking, i.e., differential lunar laser ranging (DLLR). With a large flux of received photons, the station will realize fast switching between two or more reflectors to attain a novel kind of observation: lunar range differences. DLLR will decrease the atmospheric errors largely, resulting in a very high accuracy for the differential range at the level of ~30 µm. Furthermore, DLLR will significantly improve our knowledge of the lunar interior and benefit the relativity tests. In this study, we investigate the potential of DLLR using simulated DLLR data, where we put some focus on the combination of LLR and DLLR data. DLLR data only with a rather short time span of observations (in the beginning) are merely able to determine the lunar orbit well, which has a negative effect on the estimation of other lunar parameters. However, LLR with its long timespan has the advantage of providing an accurate orbit. By combining with LLR, even DLLR data over a rather short time span (e.g., 5 years) can remarkably enhance the parameter estimation for the lunar interior. We also studied the effects of different kinds of reflector baselines of DLLR on estimating lunar-interior parameters, proving that baselines with longer length and crossing shape are most beneficial for the investigation of the lunar interior.

Item URL in elib:https://elib.dlr.de/192995/
Document Type:Conference or Workshop Item (Speech)
Title:Combination of Lunar Laser Ranging and Differential Lunar Laser Ranging
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Zhang, MingyueInstitut für Erdmessung, Leibniz Universität Hannoverhttps://orcid.org/0000-0002-2198-1747UNSPECIFIED
Müller, JürgenInstitut für Erdmessung, Leibniz Universität Hannoverhttps://orcid.org/0000-0003-1247-9525UNSPECIFIED
Biskupek, LilianeLeibniz Universität Hannoverhttps://orcid.org/0000-0002-4204-6838UNSPECIFIED
Singh, Vishwa VijayInstitut für Erdmessung, Leibniz Universität Hannoverhttps://orcid.org/0000-0003-2973-2435UNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Lunar Laser Ranging, Ephemeriden, Geophysik des Mondes
Event Title:22nd International Workshop on Laser Ranging
Event Location:Guadalajara, Spanien
Event Type:Workshop
Event Start Date:7 November 2022
Event End Date:11 November 2022
Organizer:International Laser Ranging Service (ILRS)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Lunar Laser Ranging
Location: Hannover
Institutes and Institutions:Institute for Satellite Geodesy and Inertial Sensing > Satellite Geodesy and Geodetic Modelling
Deposited By: Schilling, Manuel
Deposited On:06 Jan 2023 08:30
Last Modified:24 Apr 2024 20:54

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