Results 21 to 30 of about 2,632 (195)
New evidence about the subduction of the Copiap\uf2 ridge beneath South America, and its connection with the Chilean-Pampean flat slab, tracked by satellite GOCE and EGM2008 models [PDF]
, 2015 Satellite-only gravity measurements and those integrated with terrestrial observations provide global gravity field models of unprecedented precision and spatial resolution, which allow analyzing lithospheric structure allowing the analysis of the ...
Alvarez, O. +6 more
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A comparison of GOCE gravitational models with EGM2008
Journal of Geodynamics, 2014 Abstract Four new gravity field models from GOCE, two of them combined with GRACE, are compared here with EGM2008. The objectives are to look into the differences in consecutive ranges of the spherical harmonic expansion globally as well as in selected geographical regions and in the regions of the various data sources used for EGM2008.
Weiyong Yi, Reiner Rummel
openaire +3 more sources
Evaluation of ASTER GDEM in the northeastern margin of Tibetan Plateau in gravity reduction
Geodesy and Geodynamics, 2017 In this paper, we first transferred the normal height of ASTER GDEM v2 to GPS ellipsoidal height based on the EGM96, and analyzed the precision of this digital elevation model in the northeastern margin of Tibetan Plateau (NETP) combining with 89 ground ...
Guoqing Zhang +4 more
doaj +1 more source
Water surface height determination with a GPS wave glider: a demonstration in Loch Ness, Scotland [PDF]
, 2016 A geodetic GPS receiver has been installed on a Wave Glider, an unmanned water surface vehicle. Using kinematic precise point positioning (PPP) GPS, which operates globally without directly requiring reference stations, surface heights are measured with ~
Foden, P.R. +5 more
core +1 more source
Journal of Geodetic Science, 2013 The release of global digital databases for the description of the Earth’s topography and the shape of the Earth’s crust in terms of consistency and geometry initiates a new era in the interpretation and analysis of the observed gravity field of our ...
Tsoulis D.
doaj +1 more source
Engineering, 2020 This paper focuses on estimating a new high-resolution Earth’s gravity field model named SGG-UGM-2 from satellite gravimetry, satellite altimetry, and Earth Gravitational Model 2008 (EGM2008)-derived gravity data based on the theory of the ellipsoidal ...
Wei Liang +4 more
doaj +1 more source
Covariance function modelling in local geodetic applications using the simplex method [PDF]
, 2016 Collocation has been widely applied in geodesy for estimating the gravity field of the Earth both locally and globally. Particularly, this is the standard geodetic method used to combine all the available data to get an integrated estimate of any ...
Barzaghi, Riccardo +4 more
core +3 more sources
Improving EGM2008 by GPS and leveling data at local scale [PDF]
Boletim de Ciências Geodésicas, 2014 The development of the Earth Gravitational Model 2008 (EGM2008) model is a significant contribution for modeling the Earth's gravity and geoid. Recently, it can be confidently used versus geometric models following a simple refinement procedure. Several studies show that, EGM2008 can reach the accuracy of regional or local geoid models after modeling ...
openaire +3 more sources
Global geoid adjustment on local area for GIS applications using GNSS permanent station coordinates
Geodesy and Cartography, 2018 Orthometric heights, useful for many engineering and geoscience applications, can be obtained by GPS (Global Positioning System) surveys only when an accurate geoid undulation model (that supplies the vertical separation between the geoid and WGS84 ...
Ugo Falchi +2 more
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Applied Sciences, 2020 Precise geoid heights are not as important for understanding Earth’s gravity field, but they are important to geodesy itself, since the vertical datum is defined as geoid in a cm-level accuracy.
Kwang Bae Kim +2 more
doaj +1 more source