Results 51 to 60 of about 1,527 (198)
Journal of Advances in Modeling Earth Systems, Volume 17, Issue 4, April 2025.Abstract The Global Navigation Satellite System (GNSS) airborne radio occultation (ARO) technique is used to retrieve profiles of the atmosphere during reconnaissance missions for atmospheric rivers (ARs) on the west coast of the United States. The measurements of refractive bending angle integrate the effects of variations in refractive index over ...
P. Hordyniec +5 more
wiley +1 more source
Modelling local GPS/levelling geoid undulations using Support Vector Machines
Periodica Polytechnica Civil Engineering, 2008 Support vector machines (SVM) with wavelet kernel has been applied to the correcting gravimetric geoid using GPS/levelling data. These data were divided into a training and a validation set in order to ensure the extendability of the approximation of the corrector surface.
Piroska Zaletnyik +2 more
openaire +2 more sources
Along‐Track Marine Geoid Resolution Enhancement With SWOT
Earth and Space Science, Volume 12, Issue 3, March 2025.Abstract Satellite altimetry has been the major data source for marine geoid determination·and gravity recovery in recent decades. In general, altimetry‐derived geoid and gravity anomaly models are typically released with a 1' × 1' gridding interval. However, their actual spatial resolution is far lower than the nominal ∼2 km level.
Xu Chen +3 more
wiley +1 more source
Assessment of the Performance of SWOT for Observing the Static Ocean Topography
Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.Abstract Marine geodetic references, such as the mean sea surface (MSS), are currently limited by the spatial resolution of conventional satellite altimeters. We analyze the new swath‐altimetry data from the Surface Water and Ocean Topography (SWOT) satellite, to determine the performance of SWOT for mapping the static ocean topography, and possible ...
Bjarke Nilsson +2 more
wiley +1 more source
Species‐By‐Species Pattern Analysis of Coastal Dune Vegetation
Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 2, February 2025.Abstract Vegetation is crucial for stabilizing and developing coastal dunes. Different plant species exhibit different spatial distributions which reflect their environmental role and adaptation strategy. This study aims to provide a fine‐scale species‐by‐species analysis of vegetation spatial patterns on coastal dunes within the San Rossore–Migliarino–
D. Demichele +3 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 1, January 2025.Abstract Gravity data provide constraints on lateral subsurface density variations and thus provide crucial insights into the geological evolution of the region. Previously, gravity data from the Norwegian Arctic archipelago of Svalbard comprised an onshore regional gravity database with coarse station spacing of 2–20 km, offshore gravity profiles ...
Kim Senger +19 more
wiley +1 more source
Near Surface Geophysics, Volume 22, Issue 6, Page 617-635, December 2024.Abstract Drone‐based geophysical surveying is an emerging measuring platform. High time‐cost efficiency and flexibility to survey over inaccessible areas make drones attractive or sometimes the only feasible option to carry geophysical measurements. This study presents a new drone‐towed electromagnetic induction and magnetic gradient sensor system used
Tobias B. Vilhelmsen +2 more
wiley +1 more source
Strategies for estimating the marine geoid from altimeter data [PDF]
In processing altimeter data from a spacecraft borne altimeter to estimate the fine structure of the marine geoid, a problem is encountered. In order to describe the geoid fine structure, a large number of parameters must be employed and it is not ...
Argentiero, P. +2 more
core +4 more sources
GPS-derived geoid using artificial neural network and least squares collocation [PDF]
, 2006 The geoidal undulations are needed for determining the orthometric heights from the Global Positioning System GPS-derived ellipsoidal heights. There ore several methods for geoidal undulation determination.
Ambrožič, Tomaž +3 more
core +1 more source
Ibis, Volume 166, Issue 4, Page 1368-1383, October 2024.Understanding how diverse assemblages of scavengers can coexist on shared ecological resources is a fundamental challenge in community ecology. However, current approaches typically focus on behaviour at carcass provisioning sites, missing how important differences in movement behaviour and foraging strategies can facilitate sympatric species ...
Christopher Beirne +10 more
wiley +1 more source