Results 31 to 40 of about 1,547,748 (299)
American Polar Society Symposium 2003 [PDF]
, 2003 Women's Roles in Polar Regions: Past, Present, and Future. American Polar Society Symposium 2003. Byrd Polar Research Center, The Ohio State University, Columbus, Ohio, October 9-10, 2003.Byrd Polar Research Center, The Ohio State UniversityAmerican ...
Byrd Polar Research Center
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Characteristics of Perturbations in Recent Length of Day and Polar Motion [PDF]
Journal of Astronomy and Space Sciences, 2013 Various features of the existing perturbations in the Earth’s spin rotation are investigated for the recent and most reliable data by spectral analysis, filtering, and comparison with idealized model. First, theory of Earth’s spin rotational perturbation
Sung-Ho Na +4 more
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Effects of the Earth’ s triaxiality on the polar motion excitations
Geodesy and Geodynamics, 2012 his study aims to evaluate the significance of the Earth’s triaxiality to the polar motion theory. First of all, we compare the polar motion theories for both the triaxial and rotationally-symmetric Earth models, which is established on the basis of the ...
Chen Wei, Shen Wenbin
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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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Image Motion of Remote Sensing Camera With Wide Field of View Over the Antarctic and Arctic
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Imaging by the remote sensing camera with a wide field of view (WFV) is of great significance in the issue of polar environment. However, the instability of the image motion velocity poses a huge challenge to the observation task since the direction of ...
Jinliang Han +6 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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Irregularities of the Polar Motion [PDF]
Symposium - International Astronomical Union, 1979 The independent series of coordinates of the pole obtained by the Defense Mapping Agency by observations of Transit satellites (DOP) and by the BIH using classical astrometry only (AST) are considered. They mainly differ by a periodic annual term. After removal of the mean annual difference from AST, the two series are compared.
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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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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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Geodetic residual time series: A combined series by minimization of their internal noise level
Frontiers in Earth Science, 2023 This study aims to assess the hydrological effects of polar motion calculated from different combinations of geophysical excitations at decadal, seasonal, and non-seasonal periods.
Małgorzata Wińska
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