Results 241 to 250 of about 16,098 (281)

Application of global geopotential models to high-precesion levelling processing

Geodesy and Cartography, 2017
The article studies the properties of the high-degree gravity field model EGM-2008 in the calculation of integral characteristics at large distances several times greater than the spatial resolution of the model. As an example of an indirect evaluation of a high-degree model, a gravimetric correction was computed into the sum of the measured ...
V.V. Popadyev, D.A. Kuliev
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Evaluation of global geopotential models: a case study for India

Survey Review, 2018
This paper aims to identify most suitable global geopotential model (GGM) for India, by comparing 15 GGMs developed through 1996 to 2017.
Ropesh Goyal, Onkar Dikshit, Nagarajan Balasubramania   +2 more
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Accuracy Estimates of Geopotential Models and Global Geoids

1996
The authors have developed a theoretical Geopotential Model Testing (GMT) methodology and applied it to existing data. The GMT method was developed without hypothesis regarding the geoid or the internal mass distribution of the Earth. The testing accuracy is limited only by the observational errors at the testing sites.
Kenneth F. Burke, Scott A. True, Milan Bursa, Karel Radej   +3 more
openaire   +1 more source

Evaluation of Recent Global Geopotential Models in Argentina

2010
Recent Earth Geopotential Models (EGMs) represent a great improvement to several applications related to gravity field modeling. These models offer higher accuracy and better resolution of the gravity field.
A. Pereira, M. C. Pacino
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The use of absolute gravity data for the validation of Global Geopotential Models and for improving quasigeoid heights determined from satellite-only Global Geopotential Models

Journal of Applied Geophysics, 2018
Abstract The objective of this paper is to demonstrate the usefulness of absolute gravity data for the validation of Global Geopotential Models (GGMs). It is also aimed at improving quasigeoid heights determined from satellite-only GGMs using absolute gravity data.
Walyeldeen Godah, Jan Krynski, Malgorzata Szelachowska   +2 more
openaire   +1 more source

Estimation of the height datum geopotential value of Hong Kong using the combined Global Geopotential Models and GNSS/levelling data

Survey Review, 2021
The advent of the Gravity Recovery and Climate Experiment (GRACE) and Gravity field and steady-state Ocean Circulation Exploration (GOCE) has changed the global contribution in the determination of...
Panpan Zhang, Lifeng Bao, Dongmei Guo, Qianqian Li   +3 more
openaire   +1 more source

Analysis of Recent Global Geopotential Models Over the Croatian Territory

2010
Independent quality control of the national geoid model HRG2000 was performed using 65 control points, obtained through the realization of EUVN and EUVN_DA projects and the Croatian fundamental gravity network. Ellipsoidal heights and positions of the control points are precisely determined by GNSS measurements while the geodetic heights are obtained ...
Liker, Mihajla, Lučić, Maro, Barišić, Bojan, Repanić, Marija, Grgić, Ilija, Bašić, Tomislav   +5 more
openaire   +3 more sources

Consistent approximate models of the global atmosphere in non‐spherical geopotential coordinates

Quarterly Journal of the Royal Meteorological Society, 2011
AbstractTaking the spherical geopotential approximation as a starting point, previous work has revealed a quartet of dynamically consistent models of the global atmosphere according to whether approximations of shallow and quasi‐hydrostatic type are or are not made.
A. A. White, N. Wood
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Assessment of recent global geopotential models based on the Auvergne test area data

Engineering Research Express, 2022
Abstract The gravitational field is important for many natural phenomena related to earth dynamics, especially mass transport. Its precise determination is essential for earth sciences such as geodesy, geophysics and oceanography. Determining the earth’s gravitational field is the same as determining the earth’s potential.
openaire   +2 more sources

Global Geopotential Models and Gravity Data for the Territory of Romania

1995
In view of a gravimetric geoid computation for the territory of Romania, several global geopotential models (GGM) have been taken into account. This paper presents the ability of the OSU91A geopotential coefficient model to recover the gravity field on the Romanian territory, considering that no terrestrial gravity data from this region have been ...
Dumitru Ioane, Ion Radu
openaire   +1 more source