Results 71 to 80 of about 2,606,895 (175)

DeepRec: Global Terrestrial Water Storage Reconstruction Since 1941 Using Spatiotemporal‐Aware Deep Learning Model

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract Terrestrial water storage (TWS) plays an important role in describing the Earth system, as water availability is decisive for ecosystems and human development. Since 2002, the Gravity Recovery and Climate Experiment (GRACE) and its Follow‐On (GRACE‐FO) mission have measured TWS anomalies with unprecedented accuracy, enabling a leap in ...
Luis Q. Gentner   +5 more
wiley   +1 more source

Validation of Dynamic Deuterium Metabolic Imaging (DMI) for the Measurement of Cerebral Metabolic Rates of Glucose in Rat

open access: yesNMR in Biomedicine, Volume 39, Issue 1, January 2026.
Deuterium metabolic imaging (DMI) is a novel metabolic imaging technique where 2H MRSI is combined with the administration of 2H‐labeled substrates. Analysis of dynamic DMI is complicated by 2H label losses and kinetic isotope effects. Here, we modified a 13C‐based metabolic model to account for these effects in rat brain and validated DMI flux rates ...
Claudius S. Mathy   +4 more
wiley   +1 more source

A low jitter regenerative amplification picosecond pulse laser with the external trigger signal as local main wave for the SLR

open access: yesResults in Optics
A distributed feedback picosecond (DFB) pulse laser has been designed with a single pulse energy of 5 pJ and a pulse width of 200 ps, resulting in a spectrum width of 0.12 nm.
Mingliang Long   +7 more
doaj   +1 more source

From Flight to Intelligence: UAV Applications and Federated Learning Approaches

open access: yesIET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
The article systematically reviews the significant challenges in UAV communication control, including connectivity preservation, wireless security vulnerabilities and mobility management in dynamic 3D environments. The article explores recent advancements in UAV applications across many fields, emphasising the growing need for robust communication and ...
Ghadah Aldehim   +7 more
wiley   +1 more source

Satellite signatures in SLR observations [PDF]

open access: yes, 1993
We examine the evidence for the detection of satellite-dependent signatures in the laser range observations obtained by the UK single-photon Satellite Laser Ranging (SLR) System models of the expected observation distributions from Ajisai and Lageos are ...
Appleby, G. M.
core  

Hyperspectral Imaging: The Intelligent Eye to Uncover the Password of Plant Science

open access: yesModern Agriculture, Volume 3, Issue 2, December 2025.
Hyperspectral imaging (HSI) has emerged as a powerful non‐destructive technique for characterisation of the plant phenotype and physiological traits. The ongoing development of cost‐effective hardware, coupled with standardised acquisition protocols and open‐access spectral libraries, is accelerating its integration with multi‐omics approaches to ...
Jingyan Song   +17 more
wiley   +1 more source

Earth Rotation and Gravity Field Parameters from Satellite Laser Ranging [PDF]

open access: yes, 2014
We present the results from a simultaneous estimation of the gravity field, Earth rotation parameters, and station coordinates from combined SLR solutions incorporating up to nine geodetic satellites: LAGEOS-1/2, Starlette, Stella, AJISAI, Beacon-C ...
Thaller, Daniela   +4 more
core   +3 more sources

Estimating global geodetic parameters using SLR observations to Galileo, GLONASS, BeiDou, GPS, and QZSS

open access: yesEarth, Planets and Space, 2019
All Galileo, GLONASS, QZSS, and BeiDou satellites are equipped with laser retroreflector arrays dedicated to satellite laser ranging (SLR). Using SLR data to new GNSS systems allows for estimating global geodetic parameters, such as Earth rotation ...
K. Sośnica   +5 more
doaj   +1 more source

A History of UNAVCO: Four Decades of Advancing Geodesy

open access: yesPerspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract UNAVCO was a university‐governed consortium funded by the National Science Foundation (NSF), with support from the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to support geoscience research and education using geodesy.
Emily E. Zawacki   +4 more
wiley   +1 more source

Mass Change Index for Characterizing Hydrological Extremes Every Few Days From Satellite Gravity Measurements

open access: yesWater Resources Research, Volume 61, Issue 12, December 2025.
Abstract We introduce a new hydrological index that enables assessment of extreme events every few days from the GRACE Follow‐On (GRACE‐FO) satellite mission. The Mass Change Index (MCI) was developed by standardizing instantaneous satellite gravity anomalies computed directly from orbit perturbations.
Miao Tang   +8 more
wiley   +1 more source

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