On the Eigen‐Mode Excitation of Linear Oscillators and the Earth's Polar Motion
Sign Up to like & getrecommendations! Published in 2020 at "Annalen der Physik"
DOI: 10.1002/andp.202000262
Abstract: By transforming a 1D second‐order linear oscillator into a 2D first‐order polar motion differential equation, it can be shown that the finite smoothness (i.e., the presence of jump in finite order derivatives) of the applied… read more here.
Keywords: polar motion; eigen; excitation; earth polar ... See more keywords
Terrestrial water storage variations and their effect on polar motion
Sign Up to like & getrecommendations! Published in 2018 at "Acta Geophysica"
DOI: 10.1007/s11600-018-0227-x
Abstract: The role of continental water in polar motion excitation can be illustrated by determining Hydrological Angular Momentum calculated from terrestrial water storage (TWS). In this paper we compare global and regional changes in TWS computed… read more here.
Keywords: terrestrial water; polar motion; water; excitation ... See more keywords
The application of a combination of weighted least-squares and autoregressive methods in predictions of polar motion parameters
Sign Up to like & getrecommendations! Published in 2018 at "Acta Geodaetica et Geophysica"
DOI: 10.1007/s40328-018-0214-3
Abstract: This study employs a combination of weighted least-squares extrapolation and an autoregressive model to produce medium-term predictions of polar motion (PM) parameters. The precisions of PM parameters extracted from earth orientation parameter (EOP) products are… read more here.
Keywords: motion parameters; motion; least squares; polar motion ... See more keywords
Selecting data for autoregressive modeling in polar motion prediction
Sign Up to like & getrecommendations! Published in 2019 at "Acta Geodaetica et Geophysica"
DOI: 10.1007/s40328-019-00271-7
Abstract: The Least-squares extrapolation of harmonic models and autoregressive (LS + AR) prediction is currently considered to be one of the best prediction model for polar motion parameters. In this method, LS fitting residuals are treated as data… read more here.
Keywords: data autoregressive; selecting data; polar motion; model ... See more keywords
Application of singular spectrum analysis and multilayer perceptron in the mid-long-term polar motion prediction
Sign Up to like & getrecommendations! Published in 2021 at "Advances in Space Research"
DOI: 10.1016/j.asr.2021.06.039
Abstract: Abstract Long-term prediction parameters of polar motion (PM) with high precision have an important significance in understanding Earth geophysical processes in the future. The multilayer perceptron (MLP) is introduced into PM prediction and we try… read more here.
Keywords: term; polar motion; long term; multilayer perceptron ... See more keywords
Ice and groundwater effects on long term polar motion (1979–2010)
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DOI: 10.1016/j.jog.2017.01.008
Abstract: Abstract We examine Earth’s polar motion (PM) for the years 1979–2010 to understand climate related sources of PM excitation at periods longer than a year, and to investigate Antarctic and Greenland ice mass balance contributions… read more here.
Keywords: 1979 2010; ice; polar motion; long period ... See more keywords
Research on Earth rotation and geodynamics in Poland in 2015–2018
Sign Up to like & getrecommendations! Published in 2019 at "Geodesy and Cartography"
DOI: 10.24425/gac.2019.126094
Abstract: This paper summarizes the activity of the chosen Polish geodetic research teams in 2015–2018 in the fields of Earth: rotation, dynamics as well as magnetic field. It has been prepared for the needs of the… read more here.
Keywords: 2015 2018; rotation; earth rotation; research ... See more keywords