Results 51 to 60 of about 1,485 (184)

Drone‐towed electromagnetic and magnetic systems for subsurface characterization and archaeological prospecting

open access: yesNear 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

Improving Geoidal Height Estimates from Global Geopotential Model Using Regression Model and GPS Data [PDF]

open access: yes, 1997
Conventionally, for most application, position of a point is often referred to the geoid as the reference surface. Thus there is an important need for the knowledge of the geoid undulation in the area where positioning tasks is performed, This ...
Abdullah, Khairul Anuar
core  

GPS-derived geoid using artificial neural network and least squares collocation [PDF]

open access: yes, 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

Use of the UNB_TopoDens model for local modelling of chosen gravity field parameters in the Western Carpathians [PDF]

open access: yes, 2020
The latest, global density model of topographical masses (UNB TopoDms model) was used to determine complete Bouguer anomalies and the differences between geoid undulations and height anomalies in an area of the Western Carpathians, within the Polish ...
Jamroz, Olgierd   +2 more
core   +1 more source

Scouts vs. usurpers: alternative foraging strategies facilitate coexistence between neotropical Cathartid vultures

open access: yesIbis, 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

Bridging data gaps in Earth's gravity field from integrating GRACE, GRACE-FO, and Swarm data: Case study in Africa

open access: yesEgyptian Journal of Remote Sensing and Space Sciences
The GRACE and GRACE Follow-On (GFO) missions, led by American and German teams, along with the European mission Swarm, have revolutionized the study of Earth's dynamic gravity field through precise measurements.
Hussein A. Mohasseb   +2 more
doaj   +1 more source

Seamless Map of Depth to the Moho Interface in the Afro‐Arabian Region Using Gravity Data Derived From EGM2008

open access: yesGeochemistry, Geophysics, Geosystems, Volume 25, Issue 7, July 2024.
Abstract The Afro‐Arabian region is one of the few places on land, where rifting processes at divergent plate boundaries can be thoroughly investigated. One of the crucial factors in understanding rifting processes involves assessing the crustal thickness.
Elias Lewi
wiley   +1 more source

ALTKAL: An optimum linear filter for GEOS-3 altimeter data [PDF]

open access: yes
ALTKAL is a computer program designed to smooth sea surface height data obtained from the GEOS 3 altimeter, and to produce minimum variance estimates of sea surface height and sea surface slopes, along with their standard derivations.
Amann, D. W., Fang, B. T.
core   +1 more source

Thermochemical Structure of the Superior Craton and Environs: Implications for the Evolution and Preservation of Cratonic Lithosphere

open access: yesGeochemistry, Geophysics, Geosystems, Volume 25, Issue 6, June 2024.
Abstract The Archean Superior craton was formed by the assemblage of continental and oceanic terranes at ∼2.6 Ga. The craton is surrounded by multiple Proterozoic mobile belts, including the Paleoproterozoic Trans‐Hudson Orogen which brought together the Superior and Rae/Hearne cratons at ∼1.9–1.8 Ga.
Riddhi Dave   +3 more
wiley   +1 more source

Strategies for estimating the marine geoid from altimeter data [PDF]

open access: yes
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

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