Results 181 to 190 of about 29,699 (219)

The effect of anomalous global lateral topographic density on the geoid-to-quasigeoid separation

Journal of Geodesy, 2021
Robert Tenzer, Wenjin Chen, Martin Pitoňák   +2 more
exaly   +2 more sources

New gravimetric-only and hybrid geoid models of Taiwan for height modernisation, cross-island datum connection and airborne LiDAR mapping

Journal of Geodesy, 2020
Cheinway Hwang, Ming Yang
exaly   +2 more sources

A precise geoid model of Bosnia and Herzegovina by the KTH method and its validation

Survey Review, 2023
We compute the first gravimetric geoid model for Bosnia and Herzegovina (BHG2022) based upon the KTH method and additive corrections. The BHG2022 is computed with the help of 34,820 terrestrial gravity points and a digital elevation model produced by the
Dževad Krdžalić, Ramazan Alpay Abbak
semanticscholar   +1 more source

Constraints on Mantle Viscosity From Intermediate‐Wavelength Geoid Anomalies in Mantle Convection Models With Plate Motion History

Journal of Geophysical Research: Solid Earth, 2021
The Earth's long‐ and intermediate‐wavelength geoid anomalies are surface expressions of mantle convection and are sensitive to mantle viscosity. While previous studies of the geoid provide important constraints on the mantle radial viscosity variations,
W. Mao, S. Zhong
semanticscholar   +1 more source

Colorado geoid modeling at the US National Geodetic Survey

Journal of Geodesy, 2020
The geoid computation method currently used at the US National Geodetic Survey is based on the analytical downward continuation solution of the Molodensky geodetic boundary value problem.
Yan Ming Wang, Xiaopeng Li, Kevin Ahlgren   +2 more
exaly   +2 more sources

On determination of the geoid from measured gradients of the Earth's gravity field potential

Earth-Science Reviews, 2021
The geoid is an equipotential surface of the static Earth's gravity field which plays a fundamental role in definition of physical heights related to the mean sea level (orthometric heights) in geodesy and which represents a reference surface in many ...
P. Novák, M. Šprlák, M. Pitoňák
semanticscholar   +1 more source

Improving accuracy of local geoid model using machine learning approaches and residuals of GPS/levelling geoid height

Survey Review, 2021
This study aims to use GPS/Levelling data and machine learning techniques (MLs) to model a high precision local geoid for Kuwait. To improve the accuracy of a local geoid the global geopotential model and local terrain effect should be incorporated.
Mosbeh R. Kaloop, Samui Pijush, M. Rabah, Hamad Al-Ajami, J. Hu, A. Zaki   +5 more
semanticscholar   +1 more source

A high-resolution gravimetric geoid model for Kingdom of Saudi Arabia

Survey Review, 2021
A high-resolution gravimetric geoid model for the Kingdom of Saudi Arabia area was determined. A data set of 459,848 land gravity, 80,632 shipborne marine gravity data, DTU17 altimetry gravity model, and XGM2019e global geopotential model.
A. Zaki, S. Mogren
semanticscholar   +1 more source

The Importance of Upper Mantle Heterogeneity in Generating the Indian Ocean Geoid Low

Geophysical Research Letters, 2017
Attreyee Ghosh, Bernhard Steinberger
exaly   +2 more sources

Influence of local geoid variation on water surface elevation estimates derived from multi-mission altimetry for Lake Namco

Remote Sensing of Environment, 2019
Water surface elevation (WSE) is an essential quantity for water resource monitoring and hydrodynamic modeling. Satellite altimetry has provided data for inland water bodies. The height that is derived from altimetry measurement is ellipsoidal height. In
Liguang Jiang, Ole Baltazar Andersen, Karina Nielsen   +2 more
exaly   +2 more sources