Results 21 to 30 of about 226 (172)
Precise geoid computation using Stokes-Helmert's scheme and strict integrals of topographic effects
Geodesy and Geodynamics, 2019 The high-precision local geoid model was computed based on the improved Stokes-Helmert′s boundary value problem and strict integrals of topographic effects. This proposed method involves three steps.
Dongmei Guo, Huiyou He, Peng Sang
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Airborne geoid mapping of land and sea areas of East Malaysia
Journal of Geodetic Science, 2017 This paper describes the development of a new geoid-based vertical datum from airborne gravity data, by the Department of Survey and Mapping Malaysia, on land and in the South China Sea out of the coast of East Malaysia region, covering an area of about ...
Jamil H. +11 more
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The Influence of Bathymetry on Regional Marine Geoid Modeling in Northern Europe
Journal of Marine Science and Engineering, 2022 Although Northern Europe has been the target area in many regionwide geoid determination studies, the research has been land-focused, neglecting bathymetry information. With new projects, such as the Baltic Sea Chart Datum 2000, the attention is shifting
Sander Varbla
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On the topographic bias and density distribution in modelling the geoid and orthometric heights
Journal of Geodetic Science, 2018 It is well known that the success in precise determinations of the gravimetric geoid height (N) and the orthometric height (H) rely on the knowledge of the topographic mass distribution.
Sjöberg Lars E.
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Global spectral model of the geoid
Geodesy and Geodynamics, 2017 The coefficients of the Global Gravitational Models (GGMs) define the external gravitational field of the Earth. In many geoscience applications and gravity interpretations these coefficients are routinely used to represent the geoid surface and related ...
Robert Tenzer
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Journal of Geodetic Science, 2022 Following the definition and realization of the International Height Reference System (IHRS), the vertical coordinate of a given point at the Earth’s surface can be obtained from the computation of the geopotential value from a harmonic expansion of a ...
Tocho Claudia N. +4 more
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New solutions for the geoid potential W0 and the Mean Earth Ellipsoid dimensions
Journal of Geodetic Science, 2013 Earth Gravitational Models (EGMs) describe the Earth’s gravity field including the geoid, except for its zero-degree harmonic, which is a scaling parameter that needs a known geometric distance for its calibration. Today this scale can be provided by the
Sjöberg L. E.
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DFHRS-based computation of quasi-geoid of Latvia
Geodesy and Cartography, 2013 In geodesy, civil engineering and related fields high accuracy coordinate determination is needed, for that reason GNSS technologies plays important role.
Inese Janpaule +4 more
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GPS-gravimetric geoid determination in Egypt [PDF]
Geo-spatial Information Science, 2001 The main objective of this study is to improve the geoid by GPS/leveling data in Egypt. Comparisons of the gravimetric geoid with GPS/leveling data have been performed. On the basis of a gravimetric geoid fitted to GPS/leveling by the least square method, a smoothed geoid was obtained. A high-resolution geoid in Egypt was computed with a 2.5′×2.5′ grid
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ISPRS International Journal of Geo-Information, 2020 This investigation evaluates the performance of digital terrain models (DTMs) generated in different vertical datums by aerial LiDAR and unmanned aerial vehicle (UAV) photogrammetry techniques, for the determination and validation of local geoid models ...
Serdar Erol +3 more
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