Results 51 to 60 of about 1,948 (180)

Combining Global Geopotential Models, Digital Elevation Models, and GNSS/Leveling for Precise Local Geoid Determination in Some Mexico Urban Areas: Case Study

ISPRS International Journal of Geo-Information, 2021
This work shows improvements of geoid undulation values obtained from a high-resolution Global Geopotential Model (GGM), applied to local urban areas.
Norberto Alcantar-Elizondo, Ramon Victorino Garcia-Lopez, Xochitl Guadalupe Torres-Carillo, Guadalupe Esteban Vazquez-Becerra   +3 more
doaj   +1 more source

Application of the global geopotential models for determination of the levelling normal correction [PDF]

, 2010
Vertical networks in Poland are processed in the normal heights system called Kronstatt'86. Levelling evaluation of high precision measurements requires a determinations of normal levelling corrections, based on gravity Faye's anomalies.
Marganski, S., Kalinczuk-Stanałowska, K., Olszak, T.   +2 more
core  

Refinement of Bouguer anomalies derived from the EGM2008 model, impact on gravimetric signatures in mountainous region: Case of Cameroon Volcanic Line, Central Africa

Earth and Planetary Physics, 2020
Global geopotential models have not included the very high frequencies of the Earth’s external gravity field. This is called omission error. This omission error becomes more important in mountainous areas (areas with highly variable topography). The work
Paul Gautier Kamto, Cyrille Mezoue Adiang, Severin Nguiya, Joseph Kamguia, Loudi Yap   +4 more
doaj   +1 more source

Almost Everything You Always Wanted to Know About Representing Gravity in Global Models but Were Afraid to Ask

Journal of Advances in Modeling Earth Systems
For over 60 years, an approximation involving spherical geopotentials has underlain the representation of gravity in global numerical models of Earth's atmosphere and oceans. This article explores how departures from sphericity can be allowed by assuming
Andrew Staniforth, Andy White
doaj   +1 more source

Accuracy assessment and comparison of interpolation methods on geoid models [PDF]

Geodetski Vestnik, 2018
In this paper the accuracy of 6 spatial interpolation methods on geoid grid models are tested and compared: Inverse Distance Weighting, Kriging, Minimum Curvature, Natural Neighbour, Radial Basis Function and Moving Average.
Marko Radanović, Tomislav Bašić
doaj   +1 more source

Global Geopotential Models on the Territory of Croatia [PDF]

, 2003
U radu su prikazani rezultati ispitivanja 14 globalnih geopotencijalnih modela da bi se utvrdilo koji od njih najbolje reprezentira Zemljino polje ubrzanja sile teže na teritoriju Hrvatske.
Hećimović, Željko, Bašić, Tomislav
core   +1 more source

Evropski in globalni model geoida na območju Slovenije [PDF]

Geodetski Vestnik, 2000
Article deals with geoid models EGM96 and EGG97. Model geoidundulations are verified by means of given geoid undulations that werecomputed from measured orthometric and elipsoidal heights.
Miran Kuhar, Peter Prešeren
doaj  

Estimation of Vertical Datum Parameters Using the GBVP Approach Based on the Combined Global Geopotential Models

Remote Sensing, 2020
Unification of the global vertical datum has been a key problem to be solved for geodesy over a long period, and the main challenge for a unified vertical datum system is to determine the vertical offset between the local vertical datum and the global ...
Panpan Zhang, Lifeng Bao, Dongmei Guo, Lin Wu, Qianqian Li, Hui Liu, Zhixin Xue, Zhicai Li   +7 more
doaj   +1 more source

Comparison of CHAMP and GRACE geopotential models with terrestrial gravity field data in Hungary [PDF]

, 2006
CHAMP and GRACE global geopotential models EIGEN-3p, EIGEN-GRACE01S, GGM01S and GGM01C are compared with terrestrial gravity field data in Hungary. The methods used for comparison were direct comparison with gravity anomalies and the reference geoid ...
Gy Tóth, Tóth, Gy, Sz Rózsa, Rózsa, Sz   +3 more
core   +1 more source

Global geopotential models from 2006 to 2014 [PDF]

, 2014
Globalni geopotencijalni modeli visoke rezolucije imaju ključnu ulogu u geodeziji i geoznanostima, od praktične upotrebe, poput preciznog određivanja orbita, do znanstvene primjene, poput istraživanja gustoće struktura Zemljine unutrašnjosti.
Matija Videković, Ivana Krešić, Sara Baraba, Tamara Juretić, Luka Rumora, Švarc, Mario, Martina Idžanović, Idžanović, Martina, Igor Matišić, Matišić, Igor, Mario Švarc, Videković, Matija, Baraba, Sara, Juretić, Tamara, Rumora, Luka, Krešić, Ivana   +15 more
core   +1 more source