Results 251 to 260 of about 380,733 (291)
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Polar Motions Measurement Study.
1984Abstract : In this report we analyze the feasibility of subarc-second measurement of earth crust warp and/or earth spin axis deviation, in less than one day, using ring laser gyroscopes and accelerometers and/or tiltmeters. It is marginally feasibile, using laser gyros equivalent to the Honeywell GG1389, either unidirectionally carouseled or with ...
M. Ignagni, W. H. Egli, J. Hanse
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Bulletin Géodésique, 1982
Based on an analysis of polar motion behavior, we found the possibility of predicting polar motion up to one year in advance. Comparing these predicted polar coordinates with the observed ones (smoothed), the rms of the differences is about 0".02. The differences of the relative polar motion are much smaller.
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Based on an analysis of polar motion behavior, we found the possibility of predicting polar motion up to one year in advance. Comparing these predicted polar coordinates with the observed ones (smoothed), the rms of the differences is about 0".02. The differences of the relative polar motion are much smaller.
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Journal of Geodesy, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vicente, R. O., Wilson, C. R.
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vicente, R. O., Wilson, C. R.
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Tectonophysics, 1972
Abstract Problems about the origin of polar motions and earth tides, and the accuracies reached in their determination, are discussed. The common references system (C.I.O.) for the measurement of the instantaneous pole of rotation is defined. Hypotheses for the origin of the Chandler wobble are critically reviewed. The importance of the seventy years
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Abstract Problems about the origin of polar motions and earth tides, and the accuracies reached in their determination, are discussed. The common references system (C.I.O.) for the measurement of the instantaneous pole of rotation is defined. Hypotheses for the origin of the Chandler wobble are critically reviewed. The importance of the seventy years
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Polarization vision in crayfish motion detectors
Journal of Comparative Physiology A, 2008Motion detector interneurons were examined to determine their responsiveness to the motion of polarized light images (i.e. images segmented by spatial variations in e-vector angle). Computer generated images were displayed as intensity contrasts or polarization contrasts on a modified LCD projection panel.
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Motion Detection and Digital Polarization
2013Flying insects have extraordinary visual capabilities. Their ability to detect fast motion in the visual scene and avoid collision using low level image processing and little computational power makes their visual processing interesting for real time motion/collision detection in machine vision applications.
Mukul Sarkar, Albert Theuwissen
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Climate Excitation of Polar Motion
2002Recently, Gross (2000) demonstrated that the Chandler wobble may be excited by a combination of oceanic and atmospheric processes during 1985–1996 using observational records and a general ocean circulation model. Aoyama and Naito (2001) suggest that the atmospheric wind and pressure variations by themselves maintain a major part of the observed ...
E. W. Leuliette, J. M. Wahr
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Journal of Geodynamics, 1984
Abstract We establish a general theory that describes the rotational motion of a layered, oblate, elastic Earth under the influence of tidal forces when account is taken of the liquid outer core. We obtain a linearized version of the Navier-Stokes equation; within it not only have we retained the Coriolis and centrifugal acceleration terms, but also ...
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Abstract We establish a general theory that describes the rotational motion of a layered, oblate, elastic Earth under the influence of tidal forces when account is taken of the liquid outer core. We obtain a linearized version of the Navier-Stokes equation; within it not only have we retained the Coriolis and centrifugal acceleration terms, but also ...
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1970
The work of the International Polar Motion Service which aims at the study of polar motion has progressed smoothly from its beginning at 1962.0 with the collaboration of more than 50 stations in 24 countries — Algeria, Argentina, Australia, Belgium, Brazil, Canada, Chile, China, Czechoslovakia, Equador, Finland, France, Germany, Italy, Japan, Poland ...
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The work of the International Polar Motion Service which aims at the study of polar motion has progressed smoothly from its beginning at 1962.0 with the collaboration of more than 50 stations in 24 countries — Algeria, Argentina, Australia, Belgium, Brazil, Canada, Chile, China, Czechoslovakia, Equador, Finland, France, Germany, Italy, Japan, Poland ...
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Polar motion and Earth rotation
Reviews of Geophysics, 1979During the reporting period 1975–1978, the activity in the field of polar motion and Earth rotation in the United States has been concerned with the continuation of regular observations of polar motion and the rotational speed of the Earth, improvement in the present observational techniques, development of new observational techniques and the analysis
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