Results 21 to 30 of about 29,699 (219)

Refinement of a gravimetric geoid model for Japan using GOCE and an updated regional gravity field model

Earth, Planets and Space, 2020
We developed a refined gravimetric geoid model for Japan on a 1 × 1.5 arc-minute (2 km) grid from a GOCE-based satellite-only global geopotential model and a regional gravity field model updated in this study.
K. Matsuo, Y. Kuroishi
semanticscholar   +1 more source

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

ESTABLISHMENT OF NEW FITTED GEOID MODEL IN UNIVERSITI TEKNOLOGI MALAYSIA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
The purpose of this study is to produce fitted geoid for Universiti Teknologi Malaysia (UTM), Johor Bahru by using precise levelling and 3D GNSS control network technique.
M. K. Ismail, A. H. M. Din, A. H. M. Din, A. H. M. Din, M. N. Uti, A. H. Omar   +5 more
doaj   +1 more source

Open access to regional geoid models: the International Service for the Geoid

Earth System Science Data, 2020
. The International Service for the Geoid (ISG, https://www.isgeoid.polimi.it/, last access: 31 March 2021) provides free access to a dedicated and comprehensive repository of geoid models through its website.
M. Reguzzoni, D. Carrion, C. D. De Gaetani, A. Albertella, L. Rossi, G. Sona, K. Batsukh, J. F. Toro Herrera, K. Elger, R. Barzaghi, F. Sansò   +10 more
semanticscholar   +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

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.
doaj   +1 more source

Gravimetric geoid modeling from the combination of satellite gravity model, terrestrial and airborne gravity data: a case study in the mountainous area, Colorado

Earth, Planets and Space, 2020
Constructing a high-precision and high-resolution gravimetric geoid model in the mountainous area is a quite challenging task because of the lack of terrestrial gravity observations, rough topography and the geological complexity.
T. Jiang, Y. Dang, Chuanyin Zhang
semanticscholar   +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 user-friendly software package for modelling gravimetric geoid by the classical Stokes-Helmert method

Earth Science Informatics
With the progress in Global Navigation Satellite Systems (GNSS) technology, accurate geoid modelling has started to play an essential role in geodetic applications such as establishing height datum as a continuous surface model and related vertical ...
Ramazan Alpay Abbak, R. Goyal, A. Üstün   +2 more
semanticscholar   +1 more source