Results 41 to 50 of about 5,019 (198)

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

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

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

Cyberattack‐Resilient Fractional‐Order PPI Control for Frequency Regulation in PV‐Integrated Power Systems

open access: yesCAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Load‐frequency control (LFC) comprises a primary process in interconnected electrical power systems, playing a critical role in maintaining the stability and reliability of the electrical grid. It is of paramount importance that the designed controller functions in an optimal manner, particularly with regard to the compression of area ...
Bora Çavdar   +2 more
wiley   +1 more source

Mean sea level studies from tide gauge and satellite altimetry time series looking for the integration of Brazilian Vertical Network to SIRGAS [PDF]

open access: yesRevista Brasileira de Cartografia, 2005
In Geodesy, the monitoring of sea level plays an important role in the realization of global reference systems and allows the integration of available data from classical vertical networks, whose Vertical Datum is usually defined by the Mean Sea Level ...
Roberto T. Luz   +2 more
doaj  

Marine Gravimetry and Its Improvements to Seafloor Topography Estimation in the Southwestern Coastal Area of the Baltic Sea

open access: yesRemote Sensing, 2022
Marine gravimetry provides high-quality gravity measurements, particularly in coastal areas. After the update of new sensors in GFZ’s air-marine gravimeter Chekan-AM, gravimetry measurements showed a significant improvement from the first new campaign ...
Biao Lu   +4 more
doaj   +1 more source

125 years of exploration and research at Gough's Cave (Somerset, UK) 125 ans d'exploration et de recherches à Gough's Cave (Somerset, Royaume‐Uni)

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello   +2 more
wiley   +1 more source

Modeling Tidal Datums and Spatially Varying Uncertainty in the Texas and Western Louisiana Coastal Waters

open access: yesJournal of Marine Science and Engineering, 2019
Tidal datums are key components in NOAA’s Vertical Datum transformation project (VDatum), which enables effective vertical transformation of the water level between tidal, orthometric, and ellipsoid -based three-dimensional reference systems.
Wei Wu   +5 more
doaj   +1 more source

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