Results 41 to 50 of about 742 (185)

Topographic Effects in Geoid Determinations

Geosciences, 2018
Traditionally, geoid determination is applied by Stokes’ formula with gravity anomalies after removal of the attraction of the topography by a simple or refined Bouguer correction, and restoration of topography by the primary indirect topographic ...
Lars E. Sjöberg
doaj   +1 more source

Characterizing Landslide‐Induced Floods Using the SWOT Mission: A Case Study on the Chilcotin River, Canada

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Monitoring small rivers during extreme events is challenging, especially in remote areas. This study assesses the accuracy of the Surface Water and Ocean Topography (SWOT) mission in characterizing an extreme hydrological event on a narrow river (∼60 m wide), using a landslide‐induced flood on the Chilcotin River (Canada) as a case study. SWOT
J. Plante, C. B. Brunelle, L. Perez
wiley   +1 more source

Accurate Height Determination in Uneven Terrains with Integration of Global Navigation Satellite System Technology and Geometric Levelling: A Case Study in Lebanon

Computation
The technology for determining a point’s coordinates on the earth’s surface using the global navigation satellite system (GNSS) is becoming the norm along with ground-based methods.
Murat Mustafin, Hiba Moussa
doaj   +1 more source

Separation Between Geoid and Quasi-Geoid: Analysis of the Differences Between Normal-Orthometric and Rigorous Orthometric Heights

Anuário do Instituto de Geociências - UFRJ, 2018
The orthometric and normal heights are the two altitude systems most used in the practical realization of the local and national vertical geodesic data. The main difference between these two concepts is that the actual mean gravity along the plumb line between the geoid and the topographic surface theoretically defines the orthometric heights, as well ...
Fabio Luiz Albarici, Gabriel Nascimento Guimarães, Ismael Foroughi, Marcelo Santos, Jorge Luiz Alves Trabanco   +4 more
openaire   +3 more sources

Landscape Changes in the Kitchener Avalanche Path, Aoraki/Mount Cook National Park After the Record‐Breaking July 2022 Storm

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Three‐dimensional landscape changes were investigated in the Kitchener Avalanche Path, Aoraki/Mount Cook National Park, New Zealand, after an extreme storm in July 2022. The Path features an earthen diversion berm constructed in 2018 to mitigate the risk of avalanches to the adjacent Aoraki/Mount Cook Village.
David Y. Sheppard, Aubrey D. Miller, Pascal Sirguey, Simon C. Cox   +3 more
wiley   +1 more source

Beyond Geostrophic and Gradient Wind: Enhancing the Estimation of Climatic Wind Fields From Radio Occultation

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract Wind approximations, such as geostrophic and gradient wind, are limited in their ability to accurately represent atmospheric conditions in the presence of significant planetary wave activity. Those approximations, while widely applied in synoptic‐scale wind field estimation, fail to capture the full complexity of atmospheric dynamics under ...
Johannes Unegg, I. Nimac, J. Danzer
wiley   +1 more source

Breaking the Temporal Resolution Barrier: Projected Performance of Hybrid Gravity Satellite Ensemble by the Early 2030s

Earth's Future, Volume 14, Issue 3, March 2026.
Abstract Limitations in the temporal resolution of contemporary gravity satellite missions hinder the precise monitoring of rapid Earth surface mass changes. By the early 2030s, unprecedented high‐temporal monitoring of Earth's dynamic mass redistribution will be available using the temporal gravity field derived from the Hybrid Gravity Satellite ...
Zhengwen Yan, Jiangjun Ran, Jianli Chen, Martin Lasser, Patrick Smith, Yu Zhang, Luca Massotti   +6 more
wiley   +1 more source

Determination of correlation coefficient between geoid-to-quasigeoid separation calculated by the satellite data in Sjöberg’s equation and GPS/Levelling method [PDF]

Geodesy and Cartography, 2018
In this paper, two techniques for calculating the geoid-to-quasigeoid separation are employed. One of them is GPS/Levelling customary method as a criterion where the geoid undulation and height anomaly are computed by subtracting the ellipsoid height ...
Ata Eshaghzadeh, Roghayeh Alsadat Kalantari, Zohreh Moeini Hekmat   +2 more
doaj   +1 more source

The Climate Modeling Alliance Atmosphere Dynamical Core: Concepts, Numerics, and Scaling

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 3, March 2026.
Abstract This paper presents the dynamical core of the Climate Modeling Alliance (CliMA) atmosphere model, designed for efficient simulation of a wide range of atmospheric flows across scales. The core uses the nonhydrostatic equations of motion for a deep atmosphere, discretized with a hybrid approach that combines a spectral element method (SEM) in ...
Dennis Yatunin, Simon Byrne, Charles Kawczynski, Sriharsha Kandala, Gabriele Bozzola, Akshay Sridhar, Zhaoyi Shen, Anna Jaruga, Julia Sloan, Jia He, Daniel Zhengyu Huang, Valeria Barra, Ray Chew, Anudhyan Boral, Yi‐fan Chen, Oswald Knoth, Paul Ullrich, Cheikh Mbengue, Tapio Schneider   +18 more
wiley   +1 more source

SWOT Sheds Light on Seiche Oscillations Within Atoll Islands

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract This study investigates the occurrence of surface elevation oscillations, known as seiches, at the atoll scale. We show that the innovative Ka‐band Radar Interferometer (KaRIn) onboard the Surface Water Ocean Topography (SWOT) satellite makes it possible to visualize seiche‐like structures within lagoons of French Polynesia.
E. Rebouillat, L. Oruba, M. Hopuare, S. Planes, E. Dormy   +4 more
wiley   +1 more source