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Geodesy: General theory and methodology 2015–2018 [PDF]
Geodesy and Cartography, 2019 The summary of research activities concerning general theory and methodology performed in Poland in the period of 2015–2018 is presented as a national report for the 27th IUGG (International Union of Geodesy and Geophysics) General Assembly.
Andrzej Borkowski +2 more
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Water Resources Research, 2023 Given the success of the Gravity Recovery and Climate Experiment (GRACE) mission in mapping terrestrial water storage (TWS) since 2002, recent reconstructions of long‐term TWS rely on the use of statistical machine learning to apply GRACE‐derived ...
Shanshan Deng, Yuxin Liu, Wenxi Zhang
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Norway and past International Polar Years—a historical account [PDF]
, 2007 Surveying Norway’s role in past International Polar Years (IPYs), this essay by historian Stian Bones contributes to a broader understanding of Norway as a “polar nation”. He describes the strengths of Norway’s scientific traditions in the polar regions,
Bones, Stian, Stian Bones
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Polar Motion — An Overview [PDF]
International Astronomical Union Colloquium, 2000 AbstractAfter one hundred years of intensive study, some aspects of polar motion remain poorly understood. This motion of the Earth’s axis of rotation with respect to its mantle and crust has been observed and studied since the creation of the International Latitude Service.
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Collective Motion of Vibrated Polar Disks [PDF]
Physical Review Letters, 2010 4 pages, 4 ...
Deseigne, Julien +2 more
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Astronomy & AstrophysicsContext. Five Venus missions are under development to study the planet in the next decade, with both NASA’s VERITAS and ESA’s EnVision featuring a geophysical investigation among their objectives. Their radar and gravity experiments will determine Venus’s orientation, enabling analyses of its spin dynamics to infer relevant geophysical and atmospheric ...
P.-L. Phan, N. Rambaux
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Journal of Astronomy and Space SciencesTwo main components of polar motion are Chandler wobble and annual wobble. Annual wobble is obviously caused by the seasonal perturbations on the Earth – such was suspected as well as readily confirmed in unison.
Sung-Ho Na, Yu Yi
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IGS polar motion measurement accuracy
Geodesy and Geodynamics, 2017 We elaborate an error budget for the long-term accuracy of IGS (International Global Navigation Satellite System Service) polar motion estimates, concluding that it is probably about 25–30 μas (1-sigma) overall, although it is not possible to quantify ...
Jim Ray, Paul Rebischung, Jake Griffiths
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On the external forcing of global eruptive activity in the past 300 years
Frontiers in Earth Science, 2023 The decryption of the temporal sequence of volcanic eruptions is a key step in better anticipating future events. Volcanic activity results from a complex interaction between internal and external processes, with time scales spanning multiple orders of ...
J-L. Le Mouël +16 more
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Modeling mobile robot motion with polar representations [PDF]
2009 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2009 This article compares several parameterizations and motion models for improving the estimation of the nonlinear uncertainty distribution produced by robot motion. In previous work, we have shown that the use of a modified polar parameterization provides a way to represent nonlinear measurements distributions in the Cartesian space as linear ...
Joseph Djugash +2 more
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