Results 61 to 70 of about 742 (185)
Regional geoid-model-based vertical datums – some Australian perspectives
Journal of Geodetic Science, 2012 This article summarises some considerations surrounding a geoid-model-based vertical datum that have to be thought through before its implementation and adoption.
Featherstone W. E. +5 more
doaj +1 more source
Unveiling the Floodplain River‐Lake Hydrological Interactions by SWOT Observations
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract The bidirectional exchange between rivers and floodplain lakes is critical for regional hydrology, nutrient cycling, and ecosystem management. However, observing the two‐dimensional water surface elevation (WSE) fields that govern these interactions remains a long‐standing challenge, limiting understanding of hydraulic regime shifts.
Pengfei Zhan +6 more
wiley +1 more source
Hybrid Geoid Model: Theory and Application in Brazil
Anais da Academia Brasileira de CiênciasDetermination of the ellipsoidal height by Global Navigation Satellite Systems (GNSS) is becoming better known and used for purposes of leveling with the aid of geoid models.
DANIEL ARANA +2 more
doaj +1 more source
Geodesy and Cartography, 2013 Currently, the determination of geopotential value W0 of local geoid that best fits local mean sea level at the Zero Tide Gauge Station is getting important in building the National Geoid-Based Vertical System.
Ha Minh Hoa
doaj +1 more source
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract By analyzing velocity changes of the Pine Island Ice Shelf (PIIS) from October 2014 to August 2025 using Sentinel‐1A/B imagery, we find that the PIIS flow changed markedly over this period. A distinct slowdown occurred at the central PIIS from 14 March 2022 to 20 January 2023, during which velocities decreased from 13.15 ± 0.04 to 12.71 ± 0.17
Yite Chien, Chunxia Zhou, Bryan Riel
wiley +1 more source
The Once and Future Hydrology Is Whole Earth Hydrology
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract We here argue for a new paradigm to advance pursuit of truth in global freshwater science. Our proposed Whole Earth Hydrology is hydrology that is explicitly empirical and discovery‐based, grounded in primary data, detailed at scale, and incorporates humans as essential.
Colin J. Gleason, Casey M. Brown
wiley +1 more source
Terrestrial, Atmospheric and Oceanic Sciences, 2019 We first report the results from analyzing the GRACE satellite data for the coseismic and long-term post-seismic changes in the Earth’s gravity field and geoid height induced by the 2004 Sumatra-Andaman earthquake (Mw 9.2) and the 2012 Indian-Ocean ...
Yusaku Tanaka +2 more
doaj +1 more source
Intercontinental height datum connection with GOCE and GPS-levelling data
Journal of Geodetic Science, 2012 In this study an attempt is made to establish height system datum connections based upon a gravity field and steady-state ocean circulation explorer (GOCE) gravity field model and a set of global positioning system (GPS) and levelling data. The procedure
Gruber T., Gerlach C., Haagmans R.
doaj +1 more source
Deflections of the vertical and geoid heights from gravity gradients [PDF]
Acta Geodaetica et Geophysica Hungarica, 2005 In the 20th century more than 60000 torsion balance measurements were made in Hungary. At present efforts are made to rescue the historical torsion balance data; today 24544 torsion balance measurements are available for further processing in computer database. Previously only the horizontal gradients of gravity were used by geophysicists, but there is
openaire +2 more sources
The geoid or quasigeoid – which reference surface should be preferred for a national height system?
Journal of Geodetic Science, 2013 Most European states use M. S. Molodensky’s concept of normal heights for their height systems with a quasigeoid model as the reference surface, while the rest of the world rely on orthometric heights with the geoid as the zero-level.
Sjöberg L. E.
doaj +1 more source