Earth rotation parameter estimation from LLR
- authored by
- Vishwa Vijay Singh, Liliane Biskupek, Jürgen Müller, Mingyue Zhang
- Abstract
LLR measures the distance between observatories on Earth and retro-reflectors on Moon since 1969. In this paper, we estimate the Earth Rotation Parameters (ERP; terrestrial pole offsets, xp and yp, and Earth rotation phase, ΔUT) using LLR data. We estimate the values of ΔUT, and the pole offsets separately. For the pole offsets, we estimate the values of xp and yp together and separately. Overall, the uncertainties of ERP from the new LLR data (after 2000.0) have significantly improved, staying less than 20 μs for ΔUT, less than 2.5 mas for xp, and less than 3 mas for yp for nights selected from subsets of the LLR time series which have 10 and 15 normal points obtained per night. Furthermore, we add the non-tidal loading effect provided by the IMLS, as observation level corrections of the LLR observatories in the analysis. This effect causes deformations of the Earth surface up to the centimetre level. Its addition in the Institute of Geodesy (IfE) LLR model, leads to a marginal improvement in the uncertainties (3-σ values) of about 1% for both, ΔUT and the pole offsets.
- Organisation(s)
-
Institute of Geodesy
QuantumFrontiers
- External Organisation(s)
-
DLR-Institute for Satellite Geodesy and Inertial Sensing
- Type
- Article
- Journal
- Advances in Space Research
- Volume
- 70
- Pages
- 2383-2398
- No. of pages
- 16
- ISSN
- 0273-1177
- Publication date
- 15.10.2022
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Aerospace Engineering, Astronomy and Astrophysics, Geophysics, Atmospheric Science, Space and Planetary Science, Earth and Planetary Sciences(all)
- Electronic version(s)
-
https://arxiv.org/abs/2110.14274 (Access:
Open)
https://doi.org/10.1016/j.asr.2022.07.038 (Access: Open)
-
Details in the research portal "Research@Leibniz University"