Results 21 to 30 of about 1,044,226 (312)

Validation and comparison of several global geopotential models with an official quasigeoid solution of Serbia

Geodetski Vestnik, 2022
This study aims to analyze the quality of several local reference quasigeoid surfaces obtained from several Global Geopotential Models (GGM) relative to the official quasigeoid solution of Serbia (SQM2011) and GNSS/dh observations for the territory of ...
Marko D. Stanković, Oleg R. Odalović, Miloš D. Marković   +2 more
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

Geoid Studies in Two Test Areas in Greece Using Different Geopotential Models towards the Estimation of a Reference Geopotential Value

Remote Sensing, 2023
In the present study, we first examine the contribution of different, satellite-only or combined, global geopotential models in geoid computation employing the remove–compute–restore approach. For this reason, two test areas of about 100 km2 each, one in
Vassilios N. Grigoriadis, Vassilios D. Andritsanos, Dimitrios A. Natsiopoulos, Georgios S. Vergos, Ilias N. Tziavos   +4 more
doaj   +1 more source

Gravity field of Sarmatia according to satellite data (model EIGEN-6S2) and its interpretation

Геофизический журнал, 2021
The paper presents a brief overview of satellite observations of the CHAMP, GRACE and GOCE missions to study the Earth’s global gravity field, and the used mathematical apparatus in the form of an expansion of the geopotential in spherical harmonics ...
O. A. Chornaya, T. P. Yegorova
doaj   +1 more source

Recovery of Rapid Water Mass Changes (RWMC) by Kalman Filtering of GRACE Observations

Remote Sensing, 2020
We demonstrate a new approach to recover water mass changes from GRACE satellite data at a daily temporal resolution. Such a product can be beneficial in monitoring extreme weather events that last a few days and are missing by conventional monthly GRACE
Guillaume Ramillien, Lucía Seoane, Maike Schumacher, Ehsan Forootan, Frédéric Frappart, José Darrozes   +5 more
doaj   +1 more source

Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model

Scientific Reports, 2022
Notable changes in the wintertime Arctic atmospheric circulation have occurred over the last few decades. Despite its importance in understanding the recent changes in the Northern Hemisphere midlatitude climate, it remains unclear whether and how these ...
Heeje Cho, Jong-Seong Kug, Sang-Yoon Jun
doaj   +1 more source

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

ISPRS Int. J. Geo Inf., 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, G. E. Vazquez-Becerra   +3 more
semanticscholar   +1 more source

The Accuracy Verification of Recent Global Geopotential Model based on GNSS/Levelling Data on Ground Control Points in Johor [PDF]

E3S Web of Conferences
The external gravitational field of the Earth is mathematically represented using spherical harmonic (SH) coefficients in the global geopotential model. Hence, the appropriate global geopotential model for a region needs to determine a reference surface ...
Qi Lee Z., Yazid Nornajihah Mohammad, Sebastian Joshua Mickail Anak, Zaki Ahmad Hakimi Mohd, Din Ami Hassan Md, Pa’suya Muhammad Faiz   +5 more
doaj   +1 more source

Comparison of Gravity Anomalies from Recent Global Geopotential Models with Terrestrial Gravity and Airborne Gravity over Johor Region

International Journal of Integrated Engineering, 2021
Gravity anomalies can yield an indirect but extremely useful picture of lateral changes in rock composition and structural patterns especially for rapid development area such as Johor region.
S. Rambat, N. Abdullah, Norehan Yaacob, N. Othman, Z. Abidin, Faculty Geoinformation   +5 more
semanticscholar   +1 more source

Bias-corrected CMIP6 global dataset for dynamical downscaling of the historical and future climate (1979–2100)

Scientific Data, 2021
Measurement(s) temperature of air • atmospheric wind • humidity • geopotential height • temperature of sea surface • surface pressure • sea level pressure Technology Type(s) climate model • meteorological reanalysis Factor Type(s) zonal wind • meridional
Zhongfeng Xu, Ying Han, Chi-Yung Tam, Zong-Liang Yang, Congbin Fu   +4 more
doaj   +1 more source