Results 41 to 50 of about 977,590 (212)

Evaluation of W0 in Canada using tide gauges and GOCE gravity field models

open access: yesJournal of Geodetic Science, 2012
The existing Canadian Geodetic Vertical Datum of 1928 (CGVD28) does not meet the needs of the modern user in terms of accuracy and accessibility.
Hayden T.   +3 more
doaj   +1 more source

Vertical datum unification for the International Height Reference System (IHRS)

open access: yes, 2017
The International Association of Geodesy released in July 2015 a resolution for the definition and realisation of an International Height Reference System (IHRS).
Sánchez L., Sideris M.G.
core   +1 more source

Geological carbon dioxide storage in the German North Sea: Static‐to‐dynamic capacity refinement for a 10 Mt/y injection scenario

open access: yesDeep Underground Science and Engineering, EarlyView.
This study assesses whether a saline aquifer in the German North Sea can sustain industrial‐scale CO2 injection at 10 Mt/year over 30 years. A 3D reservoir model is used to compare static capacity with dynamically achievable storage. The work links site‐scale injection strategy design with basin‐scale pressure response, providing a framework for ...
Firdovsi Gasanzade, Sebastian Bauer
wiley   +1 more source

Monitoring shallow geothermal aquifers with active‐source distributed acoustic sensing: A prognostic feasibility study on the University of Leeds Geothermal Campus

open access: yesNear Surface Geophysics, EarlyView.
Abstract The United Kingdom's shallow aquifers offer significant but underdeveloped geothermal energy resource. Seismic methods can help address this by improving the understanding of aquifer heterogeneity and potentially allowing long‐term monitoring of thermal plumes.
Adam D. Booth   +10 more
wiley   +1 more source

Dynamically and economically updating the National Elevation Datum with the assistance of InSAR: A case study in North China Plain

open access: yesGeodesy and Geodynamics
Land subsidence significantly impacts the accuracy of the National Elevation Datum in China. In order to solve this issue, a dynamic and economical way was proposed to update the National Elevation Datum with the assistance of InSAR in the North China ...
Wenke Zheng   +4 more
doaj   +1 more source

New solutions for the geoid potential W0 and the Mean Earth Ellipsoid dimensions

open access: yesJournal of Geodetic Science, 2013
Earth Gravitational Models (EGMs) describe the Earth’s gravity field including the geoid, except for its zero-degree harmonic, which is a scaling parameter that needs a known geometric distance for its calibration. Today this scale can be provided by the
Sjöberg L. E.
doaj   +1 more source

Evaluation of the geopotential value W0LVD of China

open access: yesGeodesy and Geodynamics, 2017
Estimation of the zero-height geopotential value W0LVD for the CVD (China Vertical Datum) plays a fundamental role in the connection of traditional height reference systems into a global height system.
Lin He, Yonghai Chu, Nan Yu
doaj   +1 more source

Advancements of Geodetic Activities in Nepal: A Review on Pre- and Post-2015 Gorkha Earthquake Eras with Future Directions

open access: yesRemote Sensing, 2022
From celestial objects to every feature on Earth, geodesy provides a reference frame and is the foundation for surveying, mapping, and other geoscience activities.
Shanker KC, Tri Dev Acharya
doaj   +1 more source

Direct Measurement of Explosive Impulse From Contact to the Ultra‐Near Field

open access: yesPropellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Measurement of impulse from explosive charges in contact and ultra‐near‐field regimes remains poorly characterised due to the short duration of loading, high strain rates, and the difficulty of obtaining direct momentum‐based measurements.
R. Alford   +3 more
wiley   +1 more source

Effects of Datum Definition on Estimation of GNSS Vertical Velocities

open access: yes, 2022
The aim of this study is to study the effects of datum definition on the estimation of vertical velocities at the continuous GNSS stations and campaign GNSS sites.
Erkoç, Muharrem Hilmi, Doğan, Uğur
core   +1 more source

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