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Fuzzy Inference Systems for the Prediction of Earth Rotation Parameters
2005The paper presents short-term and long-term predictions of Earth rotation parameters (ERP) (Length-of-Day and polar motion) up to one year by means of ANFIS (Adaptive Network based Fuzzy Inference System). The ERP C04 time series of the International Earth Rotation and Reference Systems Service (IERS) with daily values are used as data basis.
Orhan Akyilmaz, Hansjörg Kutterer
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Rotational-oscillatory variations in the Earth rotation parameters within short time intervals
Astronomy Reports, 2013A mathematical model for rotational-oscillatory motions of the Earth is constructed by applying celestial mechanics to the spatial problem of the Earth-Moon system subject to the Sun’s gravitation. Some basic phenomena associated with tidal irregularity in the Earth’s axial rotation and the polar oscillations are studied.
L. D. Akulenko +4 more
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IDS Combined Earth Rotation Parameters
In the context of the realization of the IDS contribution to the 2025 update of the ITRF2020 (i.e. ITRF2020-u2025), the IDS Combination Center (IDS CC) delivered its first combined solution (IDS 27 series) including LOD (Lenght Of Day) estimates. These daily LOD values are obtained as the combination of the ESA and GOP contributions.openaire +1 more source
Hipparcos Extragalactic Link and Earth Rotation Parameters
1993The first astrometric satellite Hipparcos (HIgh Precision PARallax COllecting Satellite) was launched in August 1989. Hipparcos measures parallaxes, positions and proper motions of more than 100 000 stars. The parallaxes are of special interest for astrophysicists, whereas the positions and proper motions will provide a reference frame with an accuracy
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Global GPS Networks and the Determination of Earth Rotation Parameters
1998Recent developments of the in-house GPS processing software at the Institute of Engineering Surveying and Space Geodesy (IESSG), University of Nottingham, has led to the capability of processing very large or even global GPS networks. This has allowed the investigation of several methods of constraining a network of stations and comparative results of ...
V. Ashkenazi +4 more
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Interaction Between Subdaily Earth Rotation Parameters and GPS Orbits
2015In this contribution we study the influence of the subdaily model for Earth rotation parameters (ERPs) on the GPS (Global Positioning System) solution and the dynamical reference frame realized by the GPS orbits. As input data we use a long term time series of daily normal equation systems (NEQ) obtained from GPS observations from 1994 till 2007 where ...
Natalia Panafidina +2 more
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Interactive Earth rotation parameters through the Web
2004On the WEB site of the Earth Orientation Center(http://hpiers.obspm.fr/eop-pc) we propose a panel of interactive toolsdevoted to the study of the Earth rotation : selection and plots of theEarth Orientation Parameters (EOP), numerical analysis of theseparameters, real time Earth rotation matrix, comparison of EOP series,and analysis of the geophysical ...
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Addendum 2020 to ‘Measurement of the Earth’s rotation: 720 BC to AD 2015’
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2021Catherine Hohenkerk
exaly
Simulation, prediction and analysis of earth rotation parameters with a dynamic Earth system model
2012Dynamic processes in the Earth system involving mass transports in the subsystems atmosphere and ocean are known to be the prominent sources for changes of Earth rotation on subseasonal to interannual time scales. Since respective geodetic observations of polar motion and variations of length-of-day are integral quantities, numerical model approaches ...
Seitz, F., Thomas, M.
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