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Mean Vertical Gradient of Gravity
2001The Stokes-Helmert scheme for precise geoid determination requires that Helmert’s gravity anomalies are first evaluated on the earth surface. Subsequently, these anomalies must be continued downward onto the geoid, where they make the boundary values for solving the geodetic boundary value problem. The anomalies are continued downward using the Poisson
P. Vanicek, J. Janák, J. Huang
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Mean Free-Air Gravity Anomalies in the Mountains
Studia Geophysica et Geodaetica, 2005Mean free-air gravity anomalies are often needed in geodesy for gravity field modelling. Two possible ways of compiling the mean free-air gravity anomalies are discussed. One way is via simple Bouguer gravity anomalies and the second and more time consuming way is via refined Bouguer gravity anomalies. In flat areas the differences between using any of
J. Janák, P. Vaníček
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Theoretical Gravity Formulae and a Mean Gravity Value
Acta Geodaetica et Geophysica Hungarica, 1999After brief description of the works of Clairaut, Stokes and Somigliana, various forms of the theoretical gravity formulae will be shown and compared. Because of the difference in the forms, the conversion between the forms will be established in order to carry out comparisons. Also, various methods to compute the mean gravity will also be presented.
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The temporal variation of mean gravity of atmosphere
Advances in Space Research, 2012Abstract One of the precise widely used global Zenith Hydrostatic Delay (ZHD) model is based on the gravity value at the centroid of the atmospheric column at the station of observation and gravity value at the centroid is constant in this model for a specific location throughout the year.
D. Singh, J.K. Ghosh, D. Kashyap
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Discussion of Mean Gravity Along the Plumbline
Studia Geophysica et Geodaetica, 2004According to the definition of the orthometric height, the mean value of gravity along the plumbline between the Earth's surface and the geoid is defined in an integral sense. In Helmert's (1890) definition of the orthometric height, a linear change of the gravity with depth is assumed. The mean gravity is determined so that the observed gravity at the
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Mean-Field Phase Transitions in Tensorial Group Field Theory Quantum Gravity
Physical Review Letters, 2023Controlling the continuum limit and extracting effective gravitational physics are shared challenges for quantum gravity approaches based on quantum discrete structures. The description of quantum gravity in terms of tensorial group field theory (TGFT) has recently led to much progress in its application to phenomenology, in particular, cosmology. This
Luca Marchetti +3 more
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Preliminary GGM07 Mean Gravity Field Model
This study summarized the processing details of GIF63. GRACE Intermediate Field 63 (GIF63): An updated GRACE, GOCE, and Surface Data Combined Gravity Field ...Zhang, Chaoyang +9 more
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Recording gravity waves by means of geostationary beacon-satellites
Journal of Atmospheric and Terrestrial Physics, 1970Abstract Using a typical example it is demonstrated that geostationary beacon-satellites are a useful means for recording the influence of gravity waves on the total electron content Nt of the ionosphere. By differentiation of Nt with respect to time the gravity waves become clearly visible expecially during those parts of the Nt-record with steep ...
W Dieminger +3 more
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Laboratory observations of mean flows under surface gravity waves
Journal of Fluid Mechanics, 2007In this paper we present mean velocity distributions measured in several different wave flumes. The flows shown involve different types of mechanical wavemakers, channels of differing sizes, and two different end conditions. In all cases, when surface waves, nominally deep-water Stokes waves, are generated, counterflowing Eulerian flows appear that act
S. G. MONISMITH +4 more
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Arctic margin gravity highs: Deeper meaning for sediment depocenters?
Marine Geophysical Researches, 1998Morphologic, gravity, and seismic reflection/refraction data from ca. 10,000 km of Arctic passive continental margins suggest that the numerous oval free-air gravity anomalies, their +50–150 mGal extrema typically located just landward of shelf breaks, are caused by combinations of rapidly deposited Plio-Pleistocene glacial marine sediment loads, older
Peter R. Vogt +2 more
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