Results 21 to 30 of about 1,494 (183)

Implementation of CORS GNSS and local geoid for precise orthometric height determination in land subsidence region (a case study in Semarang City)

Journal of Geospatial Information Science and Engineering, 2019
Geoid has an important role in converting geodetic heights to physical heights, both in orthometric height system and normal height systems. At present, Semarang City already has gravimetric geoid with centimeter-level precision.
Laode M Sabri
doaj   +1 more source

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, Reiner Jäger Jäger, Ghadi Younis, Jānis Kaminskis, Ansis Zariņš   +4 more
doaj   +1 more source

Accuracy Evaluation of Geoid Heights in the National Control Points of South Korea Using High-Degree Geopotential Model

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, Hong Sik Yun, Ha Jung Choi   +2 more
doaj   +1 more source

Comparative analysis among Asia–Pacific geoid models stored at the ISG repository

Terrestrial, Atmospheric and Oceanic Sciences, 2022
Geoid models have important applications in geosciences as well as engineering, for example, for the conversion from ellipsoidal heights observed by GNSS techniques to orthometric heights.
Carlo Iapige De Gaetani, Khulan Batsukh, Lorenzo Rossi, Mirko Reguzzoni   +3 more
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Geoid model validation and topographic bias

Journal of Geodetic Science, 2022
Recently a number of geoid campaigns were performed to verify different types of geoid and quasigeoid modeling techniques. Typically, GNSS-leveling was employed as an independent method, but in some cases zenith camera astronomic deflection data were ...
Sjöberg Lars E.
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A Comparison of Gravimetric, Isostatic, and Spectral Decomposition Methods for a Possible Enhancement of the Mantle Signature in the Long-Wavelength Geoidal Geometry

Remote Sensing, 2023
A long-wavelength geoidal geometry characterizes the most pronounced features of the Indian Ocean geoid low and the West Pacific and North Atlantic geoid highs.
Robert Tenzer, Wenjin Chen
doaj   +1 more source

Regional Mapping of the Geoid Using GNSS (GPS) Measurements and an Artificial Neural Network

Remote Sensing, 2011
The determination of the orthometric height from geometric leveling has practical difficulties that, despite a number of scientific and technological advances, passed a century without substantial modifications or advances.
Reginaldo Macedônio da Silva, Alessandro Reinhardt, Sérgio Florêncio de Souza, Marcelo Tomio Matsuoka, Mauricio Roberto Veronez   +4 more
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Analysis of high-resolution global gravity field models for the estimation of International Height Reference System (IHRS) coordinates in Argentina

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., Antokoletz Ezequiel D., Gómez Agustín R., Guagni Hernán, Piñon Diego A.   +4 more
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Methodology for optimizing heights in the Amsterdam system based on regional and global geoid/quasi-geoid models

Geodesy and Geodynamics
The article presents a methodology for transitioning to the Amsterdam height system based on utilizing global and regional geoid/quasi-geoid models. The study was conducted for the Polish-Ukrainian cross-border sector and expanded to the entire territory
Alina Fedorchuk, Bohdan Dzhuman, Mykhailo Forostyna   +2 more
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Referencing regional geoid-based vertical datums to national tide gauge networks

Journal of Geodetic Science, 2012
The objective of this study is to investigate the best means for referencing a regional geoid-based vertical datum to a network of tide gauges. In this study, a network of 27 tide gauge stations scattered along the coasts of Canada are used in order to ...
Bolkas D., Fotopoulos G., Sideris M. G.
doaj   +1 more source