Results 191 to 200 of about 2,567 (220)
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Hotine's geopotential formulation: revisited
Bulletin Géodésique, 1995Hotine's (1969) partially nonsingular geopotential formulation is revisited to study its utility for the computation of geopotential acceleration and gradients from high degree and order expansions. This formulation results in the expansion of each Cartesian derivative of the potential in a spherical harmonic series of its own.
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The accuracy of geopotential models
Planetary and Space Science, 1978The accuracy of two recent geopotential models, GEM 7 and GEM 8, is evaluated and is found to be about 4.3 m with respect to the global geoid surface for GEM 7 and 3.9 m for GEM 8. The accuracies are root mean square values obtained by the use of 400 coefficients for GEM 7 and 706 coefficients for GEM 8.
C.A. Wagner, F.J. Lerch
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Reviews of Geophysics, 1983
Substantial progress has been made in modeling the geopotential field since the last reporting period (Anderle, 1979a). Models of the gravity potential show improvement across the entire gravitational spectrum with resolution down to 1° haIf‐wavelength.
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Substantial progress has been made in modeling the geopotential field since the last reporting period (Anderle, 1979a). Models of the gravity potential show improvement across the entire gravitational spectrum with resolution down to 1° haIf‐wavelength.
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EGM96 Geopotential Model and Geophysics
5th International Congress of the Brazilian Geophysical Society, 1997Geopotential models have been rapidly developed in the last twenty years. They are now very accurate and can be useful in many fields. This paper aims to synthesize the evolution of the models and exemplify one of its possible use in geophysics.
D. Blitzkow, S. Mello
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Reviews of Geophysics, 1979
Significant improvements in the determination of the earth's potential have been achieved during the past four years. Radar altimetry data has provided a detailed geoid over most of the ocean surface while improvements and extensions of laser tracking networks and computer programs permitted increases in the accuracy and detail of the mathematical ...
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Significant improvements in the determination of the earth's potential have been achieved during the past four years. Radar altimetry data has provided a detailed geoid over most of the ocean surface while improvements and extensions of laser tracking networks and computer programs permitted increases in the accuracy and detail of the mathematical ...
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Reviews of Geophysics, 1975
In the past 4 years the determination of the gravitational field of the earth has taken evolutionary steps. The main emphasis has been in the determination of potential coefficients. The Standard Earth (SE) II solution [Gaposchkin and Lambeck, 1971] was updated to the SE III solution [Gaposchkin, 1973] by the addition of new satellite and terrestrial ...
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In the past 4 years the determination of the gravitational field of the earth has taken evolutionary steps. The main emphasis has been in the determination of potential coefficients. The Standard Earth (SE) II solution [Gaposchkin and Lambeck, 1971] was updated to the SE III solution [Gaposchkin, 1973] by the addition of new satellite and terrestrial ...
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Rotational and Divergent Geopotential Components
Journal of the Atmospheric Sciences, 1988Abstract It has been traditional in meteorology to divide the velocity field up into rotational and divergent components, but not the geopotential field. Yet any balance condition, such as the geostrophic relation or linear balance equation, is a diagnostic relation which states that not only can the balanced velocity field be computed from the ...
Kevin E. Trenberth, Shyh-Chin Chen
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On the Tidal Variation of the Geopotential
Celestial Mechanics & Dynamical Astronomy, 1993In this paper analytical expressions are derived for the temporal variations of J 2 and J 22 due to the tides of the solid Earth, taking into accountonly the deformation of the mantle, and employing a procedure already used by the authors in their Hamiltonian theory of the Earth’s rotation, which obtain the necessary parameters in a direct way by ...
Jos� M. Ferr�ndiz, Juan Getino
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Geopotential and geodynamic meters
Eos, Transactions American Geophysical Union, 1930The work done in lifting a mass m, h units of length vertically, is given by the equationw = m g hprovided g, the local gravity‐acceleration, is constant over the distance in question. If g varies with height, and we know it does, then we must resort to integration and writew = m ∫ohg dhand express g as a function of h.
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Geopotential resonances on Vanguard orbits
Journal of Geophysical Research, 1977Since their establishment in 1959 the orbits of Vanguard 3 (1959-7A) and the Vanguard 2 rocket (1959-2B) have been slowly contracting through at least five strong resonances of eleventh order. Tracking with Baker-Nunn cameras and the U.S. Navy space surveillance (radio interferometer) system over a 14-year period has revealed resonant fluctuations on ...
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