Details
| Original language | English |
|---|---|
| Title of host publication | Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022 |
| Subtitle of host publication | Gravity, Geoid, and Height Systems 2022; IAG Commission 4: Positioning and Applications, 2022; REFAG2022: Reference Frames for Applications in Geosciences, 2022 |
| Editors | Jeffrey T. Freymueller, Laura Sánchez |
| Publisher | Springer Science and Business Media Deutschland GmbH |
| Pages | 235-242 |
| Number of pages | 8 |
| ISBN (electronic) | 978-3-031-63855-8 |
| ISBN (print) | 9783031638541 |
| Publication status | Published - 13 Mar 2024 |
| Event | IAG International Symposium on Reference Frames for Applications in Geosciences, REFAG 2022 - Thessaloniki, Greece Duration: 17 Oct 2022 → 20 Oct 2022 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 156 |
| ISSN (Print) | 0939-9585 |
| ISSN (electronic) | 2197-9359 |
Abstract
The distance between the observatories on the Earth and the retro-reflectors on the Moon has been regularly measured with Lunar Laser Ranging (LLR) since 1970. In recent years, LLR observations have been carried out at infrared wavelength (OCA, WLRS), 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. By analysing LLR data, Earth Orientation Parameters (EOPs) can be determined along with other parameters of the Earth-Moon system. Focusing on ΔUT1 and terrestrial pole coordinates the accuracies have improved significantly compared to the previous results. In the past, the reported uncertainties of the estimated parameters were published as three times the formal error from the least-squares adjustment to account for small random and systematic errors in the LLR analysis. To investigate if such a scaling factor is still needed, a sensitivity analysis was performed. The current best accuracies are 12.36 μs for ΔUT1, 0.47 mas for xp and 0.59 mas for yp. Also the determined corrections to the long-periodic nutation coefficients of the MHB2000 model are now significantly smaller with higher accuracies, i.e., accuracies better than 0.18 mas are obtained.
Keywords
- Earth rotation phase, Lunar Laser Ranging, Nutation, Terrestrial pole coordinates
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022: Gravity, Geoid, and Height Systems 2022; IAG Commission 4: Positioning and Applications, 2022; REFAG2022: Reference Frames for Applications in Geosciences, 2022. ed. / Jeffrey T. Freymueller; Laura Sánchez. Springer Science and Business Media Deutschland GmbH, 2024. p. 235-242 (International Association of Geodesy Symposia; Vol. 156).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Potential of Lunar Laser Ranging for the Determination of Earth Orientation Parameters
AU - Biskupek, Liliane
AU - Singh, Vishwa Vijay
AU - Müller, Jürgen
AU - Zhang, Mingyue
N1 - Publisher Copyright: © The Author(s) 2024.
PY - 2024/3/13
Y1 - 2024/3/13
N2 - The distance between the observatories on the Earth and the retro-reflectors on the Moon has been regularly measured with Lunar Laser Ranging (LLR) since 1970. In recent years, LLR observations have been carried out at infrared wavelength (OCA, WLRS), 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. By analysing LLR data, Earth Orientation Parameters (EOPs) can be determined along with other parameters of the Earth-Moon system. Focusing on ΔUT1 and terrestrial pole coordinates the accuracies have improved significantly compared to the previous results. In the past, the reported uncertainties of the estimated parameters were published as three times the formal error from the least-squares adjustment to account for small random and systematic errors in the LLR analysis. To investigate if such a scaling factor is still needed, a sensitivity analysis was performed. The current best accuracies are 12.36 μs for ΔUT1, 0.47 mas for xp and 0.59 mas for yp. Also the determined corrections to the long-periodic nutation coefficients of the MHB2000 model are now significantly smaller with higher accuracies, i.e., accuracies better than 0.18 mas are obtained.
AB - The distance between the observatories on the Earth and the retro-reflectors on the Moon has been regularly measured with Lunar Laser Ranging (LLR) since 1970. In recent years, LLR observations have been carried out at infrared wavelength (OCA, WLRS), 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. By analysing LLR data, Earth Orientation Parameters (EOPs) can be determined along with other parameters of the Earth-Moon system. Focusing on ΔUT1 and terrestrial pole coordinates the accuracies have improved significantly compared to the previous results. In the past, the reported uncertainties of the estimated parameters were published as three times the formal error from the least-squares adjustment to account for small random and systematic errors in the LLR analysis. To investigate if such a scaling factor is still needed, a sensitivity analysis was performed. The current best accuracies are 12.36 μs for ΔUT1, 0.47 mas for xp and 0.59 mas for yp. Also the determined corrections to the long-periodic nutation coefficients of the MHB2000 model are now significantly smaller with higher accuracies, i.e., accuracies better than 0.18 mas are obtained.
KW - Earth rotation phase
KW - Lunar Laser Ranging
KW - Nutation
KW - Terrestrial pole coordinates
UR - http://www.scopus.com/inward/record.url?scp=85200677374&partnerID=8YFLogxK
U2 - 10.1007/1345_2024_238
DO - 10.1007/1345_2024_238
M3 - Conference contribution
AN - SCOPUS:85200677374
SN - 9783031638541
T3 - International Association of Geodesy Symposia
SP - 235
EP - 242
BT - Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
PB - Springer Science and Business Media Deutschland GmbH
T2 - IAG International Symposium on Reference Frames for Applications in Geosciences, REFAG 2022
Y2 - 17 October 2022 through 20 October 2022
ER -