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Effect of non-tidal station loading on Lunar Laser Ranging observatories and on the estimation of Earth orientation parameters

Singh, Vishwa Vijay and Biskupek, Liliane and Müller, Jürgen and Zhang, Mingyue (2021) Effect of non-tidal station loading on Lunar Laser Ranging observatories and on the estimation of Earth orientation parameters. EGU General Assembly 2021, 2021-04-19 - 2021-04-30, Wien, Österreich (online). doi: 10.5194/egusphere-egu21-7827.

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Official URL: https://meetingorganizer.copernicus.org/EGU21/EGU21-7827.html


The distance between the observatories on Earth and the retro-reflectors on the Moon has been regularly observed by the Lunar Laser Ranging (LLR) experiment since 1970. In the recent years, observations with bigger telescopes (APOLLO) and at infra-red wavelength (OCA) are carried out, resulting in a better distribution of precise LLR data over the lunar orbit and the observed retro-reflectors on the Moon, and a higher number of LLR observations in total. Providing the longest time series of any space geodetic technique for studying the Earth-Moon dynamics, LLR can also support the estimation of Earth orientation parameters (EOP), like UT1. The increased number of highly accurate LLR observations enables a more accurate estimation of the EOP. In this study, we add the effect of non-tidal station loading (NTSL) in the analysis of the LLR data, and determine post-fit residuals and EOP. The non-tidal loading datasets provided by the German Research Centre for Geosciences (GFZ), the International Mass Loading Service (IMLS), and the EOST loading service of University of Strasbourg in France are included as corrections to the coordinates of the LLR observatories, in addition to the standard corrections suggested by the International Earth Rotation and Reference Systems Service (IERS) 2010 conventions. The Earth surface deforms up to the centimetre level due to the effect of NTSL. By considering this effect in the Institute of Geodesy (IfE) LLR model (called 'LUNAR'), we obtain a change in the uncertainties of the estimated station coordinates resulting in an up to 1% improvement, an improvement in the post-fit LLR residuals of up to 9%, and a decrease in the power of the annual signal in the LLR post-fit residuals of up to 57%. In a second part of the study, we investigate whether the modelling of NTSL leads to an improvement in the determination of EOP from LLR data. Recent results will be presented.

Item URL in elib:https://elib.dlr.de/185882/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Publikation aus FuE Vertrag zwischen dem DLR Institut für Satellitengeodäsie und Inertialsensorik und dem Institut für Erdmessung der Leibniz Universität Hannover. Ein Autor wird durch den FuE Vertrag finanziert.
Title:Effect of non-tidal station loading on Lunar Laser Ranging observatories and on the estimation of Earth orientation parameters
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Singh, Vishwa VijayInstitut für Erdmessung, Leibniz Universität Hannoverhttps://orcid.org/0000-0003-2973-2435UNSPECIFIED
Biskupek, LilianeLeibniz Universität Hannoverhttps://orcid.org/0000-0002-4204-6838UNSPECIFIED
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
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:moon, tidal loading, lunar laser ranging
Event Title:EGU General Assembly 2021
Event Location:Wien, Österreich (online)
Event Type:international Conference
Event Start Date:19 April 2021
Event End Date:30 April 2021
Organizer:European Geosciences Union
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:07 Apr 2022 09:37
Last Modified:24 Apr 2024 20:47

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