Results 31 to 40 of about 3,699 (225)
Geodesy and Cartography, 2020 This study carries out an evaluation of the recent high-degree combined global gravity-field models (EGM2008, EIGEN-6C4, GECO and SGG-UGM-1) over Kenya. The evaluation is conducted using observed geoid undulations (18 data points, mainly in Nairobi area)
Patroba Achola Odera
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Lithospheric 3D gravity modelling using upper-mantle density constraints: Towards a characterization of the crustal configuration in the North Patagonian Massif area, Argentina [PDF]
, 2017 The North Patagonian Massif is an Argentinean plateau that has an average height of 1200 m and stands from 500 to 700 m above the neighboring areas. During Paleogene, it suffered a sudden uplift of more than 1200 m without noticeable internal deformation;
Aragon, Eugenio +5 more
core +2 more sources
Impact of datum transformation on local variations of geometric geoid in Niger
Geodesy and Cartography, 2017 In this study, we have conducted an investigation on the impact of the coordinates’ transformation on local variations of geometric geoid. The study area is limited by 1°43′12″ to 4°00′37″ East and 13°01′57″ to 14°31′20″ North in the southwest of the ...
Salissou Ibrahim Yahaya +2 more
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Earth, Planets and Space, 2017 The performance of Gravity field and steady-state Ocean Circulation Explorer (GOCE) global gravity field models (GGMs), at the end of GOCE mission covering 42 months, is evaluated using geoid undulations and free-air gravity anomalies over Japan ...
Patroba Achola Odera, Yoichi Fukuda
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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
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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
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.
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An Assessment of State-of-the-Art Mean Sea Surface and Geoid Models of the Arctic Ocean: Implications for Sea Ice Freeboard Retrieval [PDF]
, 2017 State-of-the-art Arctic Ocean mean sea surface (MSS) models and global geoid models (GGMs) are used to support sea ice freeboard estimation from satellite altimeters, as well as in oceanographic studies such as mapping sea level anomalies and mean ...
Andersen, Ole Baltazar +8 more
core +2 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
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