Results 31 to 40 of about 6,935 (225)

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
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
doaj   +1 more source

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
doaj   +1 more source

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

An Oceanographer's Guide to GOCE and the Geoid [PDF]

Ocean Science, 2006
Abstract. A review is given of the geodetic concepts necessary for oceanographers to make use of satellite gravity data to define the geoid, and to interpret the resulting product. The geoid is defined, with particular attention to subtleties related to the representation of the permanent tide, and the way in which the geoid is represented in ocean ...
Hughes, C. W., Bingham, R. J.
openaire   +6 more sources

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
doaj   +1 more source

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

Integration of satellite geodetic observations for regional geoid modeling using remove‑compute‑restore technique

, 2021
Advanced satellite geodetic systems have contributed to improving knowledge on changes in global gravity fields in recent years. These systems offer profound opportunities in the determination of a high-precision, high-resolution gravimetric geoid models
Ndehedehe, Christopher, Kalu, Ikechukwu, Okwuashi, Onuwa, Eyoh, Aniekan   +3 more
core   +1 more source

Adjustment of the Local Gravimetric Network by Several Software Packages Using the Kazan Calibration Line as an Example

Russian Journal of Earth Sciences
Processing and adjustment of gravity measurements represent an essential scientific and practical challenge in geophysics and geodesy, necessitating efficient and reliable software solutions.
Kemerbayev Nurgan, Zhumakanov Ayan, Shkiyeva Maral, Kharisov Ayrat, Islyamova Anel', Sermiagin Roman, Zhanakulova Katima, Kalen Eraly   +7 more
doaj   +1 more source

Error calibration of quasi-geoidal, normal and ellipsoidal heights of Sweden using variance component estimation

Contributions to Geophysics and Geodesy, 2010
Errors of estimated parameters in an adjustment process should be scaled according to the size of the estimated residuals or misclosures. After computing a quasigeoid (geoid), its biases and tilts, due to existence of systematic errors in the ...
Mehdi ESHAGH
doaj   +1 more source