Results 71 to 80 of about 2,359 (214)

Heights, the Geopotential, and Vertical Datums [PDF]

, 2000
Technical Report. Ohio Sea Grant Development Program, NOAA. Grant No. NA86RG0053 (R/CE-7-PD). "Modern Vertical Datums and Lake Level".This report reviews the fundamental definitions of heights and vertical datums, specifically motivated by the modern ...
Jekeli, Christopher
core  

Utilisation of Fast Fourier Transform and Least-squares Modification of Stokes formula to compile approximate geoid heights over Khartoum State: Sudan [PDF]

, 2016
We use Fast Fourier Transform (FFT) and Least-squares modification (LSM) of Stokes formula to compute the approximate geoid over Khartoum State in Sudan.
Abdalla, A, Green, CM
core   +1 more source

ICESat‐2 Coastal and Nearshore Bathymetry Product Algorithm Development

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract NASA's ICESat‐2 (Ice, Cloud and land Elevation Satellite‐2) satellite launched in 2018, carrying a single instrument, the Advanced Topographic Laser Altimeter System (ATLAS). The Level 1 science objectives of the mission focus primarily on the cryosphere, with specific interest in monitoring changes in polar ice sheets, glaciers and sea ice ...
Lori Magruder, Christopher Parrish, Jeff Perry, Matthew Holwill, J. P. Swinski, Keana Kief   +5 more
wiley   +1 more source

Evaluating the performance of various models for deriving orthometricheights using Global Navigation Satellite System (GNSS) data

Nova Geodesia
Orthometric heights are vital for fields such as topographic mapping, construction, engineering, and geophysical studies. This study examines the performance of five Global Geopotential Models (GGMs) and Global Navigation Satellite System (GNSS) data in
Herbert TATA, Clementina Ajibola OLAOYE
doaj   +1 more source

Global geoid adjustment on local area for GIS applications using GNSS permanent station coordinates

Geodesy and Cartography, 2018
Orthometric heights, useful for many engineering and geoscience applications, can be obtained by GPS (Global Positioning System) surveys only when an accurate geoid undulation model (that supplies the vertical separation between the geoid and WGS84 ...
Ugo Falchi, Claudio Parente, Giuseppina Prezioso   +2 more
doaj   +1 more source

VIIRS Radiance Cluster Analysis in CrIS Observations for Enhanced Data Assimilation in NWP Models

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract The Cross‐track Infrared Sounder (CrIS) radiance data plays a crucial role in numerical weather prediction (NWP) models by providing essential atmospheric sounding information through data assimilation. However, challenges arise in handling subpixel cloud contamination within CrIS fields of view (FOVs), which can impact the accuracy of ...
Likun Wang, Lihang Zhou, Haibin Sun, Chris Burrow, Banghua Yan, Satya Kalluri   +5 more
wiley   +1 more source

Digital model of relief

Vojnotehnički Glasnik, 1997
Digital Model of Relief (DMR) is a data set of space-structural model of the continental part of the Earth surface, presented in a digital form. It is a subset of spatial and geoinformation systems and presents one of the models of Digital Terrain Model (
Radenko Višnjić
doaj   +1 more source

Volcano‐Tectonic Crisis of Mayotte (2018–2022): A Deformation Model for Geodetic Applications

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Volcano‐tectonic unrest during the 2018–2022 crisis of Mayotte (Comoros archipelago) generated an island‐wide surface displacement reaching ∼ ${\sim} $20 cm, with a relative (internal) deformation of the island of ∼ ${\sim} $10 cm. Correcting for these displacements, which exceed the required accuracy of geodetic network reference coordinates,
Raphaël Grandin, Xavier Collilieux, Inès Pasquier, Olivier Jamet   +3 more
wiley   +1 more source

Implementation of CORS GNSS and local geoid for precise orthometric height determination in land subsidence region (a case study in Semarang City)

Journal of Geospatial Information Science and Engineering, 2019
Geoid has an important role in converting geodetic heights to physical heights, both in orthometric height system and normal height systems. At present, Semarang City already has gravimetric geoid with centimeter-level precision.
Laode M Sabri
doaj   +1 more source

A new combined quasigeoid model in Tierra del Fuego [PDF]

, 2014
This work focuses on the development of a combined quasigeoid model for Tierra del Fuego province. The Equivalent Source Technique (EST) is applied together with the remove-compute-restore technique in order to combine gravity and GPS/levelling ...
Cogliano, D. del, Gómez, M. E., Hormaechea, J. L., Perdomo, Raúl   +3 more
core   +1 more source