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Potential of Lunar Laser Ranging for the determination of Earth orientation parameters

Biskupek, Liliane and Singh, Vishwa Vijay and Müller, Jürgen and Zhang, Mingyue (2022) Potential of Lunar Laser Ranging for the determination of Earth orientation parameters. IAG International Symposium on Reference Frames for Applications in Geosciences, 2022-10-17 - 2022-10-22, Thessaloniki, Griechenland.

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Official URL: https://www.refag2022.org/

Abstract

The distance between the observatories on the Earth and the retro-reflectors on the Moon has been regularly observed with Lunar Laser Ranging (LLR) since 1970. In recent years, LLR observations have been carried out with bigger telescopes (APOLLO) and at infrared wavelength (OCA, Wettzell), resulting in a better distribution of LLR normal points over the lunar orbit and retro-reflectors with a higher accuracy, also leading to a higher number of LLR observations in total. The analysis of LLR observations has also been improved through refined modeling (e.g., modeling of the lunar core) and changes in the analysis strategy (e.g., optimized calculation of ephemerides). These refinements/modifications enable the determination of various parameters with higher accuracy.By analysing LLR data, Earth Orientation Parameters (EOP) such as the Earth rotation phase deltaUT1, terrestrial pole coordinates, and nutation coefficients, as corrections to the MHB2000 model of the IERS Conventions 2010, can be determined along with other parameters of the Earth-Moon system. Focusing on deltaUT1 and terrestrial pole coordinates from different LLR constellations such as single or multi-station data and for different numbers of normal points per night, the accuracies of the estimated Earth rotation phase and pole coordinates from the new LLR data have improved significantly compared to previous results. We achieved an accuracy of about 20 µs for deltaUT1, about 2.5 mas for xp, and about 3 mas for yp from subsets of the LLR time series containing 10 and 15 normal points per night. Focusing on determining corrections to the nutation coefficients to the MHB2000 model, significantly smaller correction values and higher accuracies with one order of magnitude improvement, i.e., accuracies better than 0.01 mas, are obtained now. Recent results are presented and discussed.

Item URL in elib:https://elib.dlr.de/192790/
Document Type:Conference or Workshop Item (Speech)
Title:Potential of Lunar Laser Ranging for the determination of Earth orientation parameters
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Biskupek, LilianeLeibniz Universität Hannoverhttps://orcid.org/0000-0002-4204-6838UNSPECIFIED
Singh, Vishwa VijayInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-2973-2435UNSPECIFIED
Müller, JürgenInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-1247-9525UNSPECIFIED
Zhang, MingyueInstitut für Erdmessung, Leibniz Universität Hannoverhttps://orcid.org/0000-0002-2198-1747UNSPECIFIED
Date:2022
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:lunar laser ranging, Erdorientierungsparameter
Event Title:IAG International Symposium on Reference Frames for Applications in Geosciences
Event Location:Thessaloniki, Griechenland
Event Type:international Conference
Event Start Date:17 October 2022
Event End Date:22 October 2022
Organizer:International Association of Geodesy
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 08:25
Last Modified:24 Apr 2024 20:53

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