Results 41 to 50 of about 25,983 (199)

CLASSIFIER FUSION OF HIGH-RESOLUTION OPTICAL AND SYNTHETIC APERTURE RADAR (SAR) SATELLITE IMAGERY FOR CLASSIFICATION IN URBAN AREA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
This study concerned with fusion of synthetic aperture radar and optical satellite imagery. Due to the difference in the underlying sensor technology, data from synthetic aperture radar (SAR) and optical sensors refer to different properties of the ...
T. Alipour Fard, M. Hasanlou, H. Arefi
doaj   +1 more source

Talking About the Weather: The Feasibility of Using Very High‐Resolution Optical Satellite Imagery to Monitor Live and Stranded Cetaceans Around the UK and UK Overseas Territories

Marine Mammal Science, EarlyView.
ABSTRACT Monitoring live and stranded cetaceans can be expensive and logistically challenging, resulting in knowledge gaps. Very high‐resolution (VHR) optical satellites are considered a potential solution to addressing some of these gaps. Despite success at detecting live and stranded cetaceans, satellites have only been trialed on restricted ...
Penny J. Clarke, Hannah C. Cubaynes, Jennifer A. Jackson, Nicola L. Taylor, David W. Johnston, Asha de Vos, Peter T. Fretwell, Aliaksandra Skachkova, Gwawr Jones   +8 more
wiley   +1 more source

A Supervised Classification Method for Levee Slide Detection Using Complex Synthetic Aperture Radar Imagery

Journal of Imaging, 2016
The dynamics of surface and sub-surface water events can lead to slope instability, resulting in anomalies such as slough slides on earthen levees. Early detection of these anomalies by a remote sensing approach could save time versus direct assessment ...
Ramakalavathi Marapareddy, James V. Aanstoos, Nicolas H. Younan   +2 more
doaj   +1 more source

Dual Polarimetric Radar Vegetation Index for monitoring forest moisture stress using time series of Sentinel‐1 SAR data

Plant Biology, EarlyView.
This study demonstrates the potential of the Sentinel‐1 Dual Polarimetric Radar Vegetation Index, combined with climate variables and the Standardized Precipitation–Evapotranspiration Index, to effectively detect and monitor drought‐induced stress in temperate broadleaf deciduous forests.
B. Ranjit, W. Bijker, H. Aghababaei, A. Stein   +3 more
wiley   +1 more source

A Hierarchical Extension of General Four-Component Scattering Power Decomposition

Remote Sensing, 2017
The overestimation of volume scattering (OVS) is an intrinsic drawback in model-based polarimetric synthetic aperture radar (PolSAR) target decomposition.
Sinong Quan, Deliang Xiang, Boli Xiong, Canbin Hu, Gangyao Kuang   +4 more
doaj   +1 more source

Validating habitat suitability assessments with post‐translocation animal movement data

Restoration Ecology, EarlyView.
Wildlife translocations are essential for restoring species to their native habitats, and species distribution models (SDMs) have proven useful for identifying suitable habitats to guide this process. Validating model predictions with data from individual's post‐translocation, however, is rare due to the frequent lack of monitoring data from ...
Ramiro D. Crego, Michael B. Brown, Jared A. Stabach, Julian Fennessy, Stephanie Fennessy, Pedro Monterroso, Daniel van de Vyver, Courtney Marneweck   +7 more
wiley   +1 more source

A History of UNAVCO: Four Decades of Advancing Geodesy

Perspectives 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, Donna J. Charlevoix, Charles M. Meertens, Jeffrey T. Freymueller, Tonie van Dam   +4 more
wiley   +1 more source

Compressive Sensing for Ground Based Synthetic Aperture Radar

Remote Sensing, 2018
Compressive sensing (CS) is a recent technique that promises to dramatically speed up the radar acquisition. Previous works have already tested CS for ground-based synthetic aperture radar (GBSAR) performing preliminary simulations or carrying out ...
Massimiliano Pieraccini, Neda Rojhani, Lapo Miccinesi   +2 more
doaj   +1 more source

NSF GAGE/SAGE Community Science Workshop: Advancing Geophysical Research Through Collaboration

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract The 2025 NSF GAGE/SAGE Community Science Workshop, hosted by the EarthScope Consortium from May 18–21 in Bloomington, Minnesota, convened 188 participants from 109 institutions for four days of scientific exchange and community engagement. The workshop featured plenary sessions, poster presentations, special interest groups, and networking ...
Gillian Haberli, William Holt, Aditya Kar, Franz J. Meyer, Tolulope Olugboji   +4 more
wiley   +1 more source

LFW2BBP: Broadband Ground‐Motion Parameters Estimation Using Physics‐Based Simulated Low‐Frequency Waveforms and Deep Learning

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract Accurate prediction of broadband ground motion parameters is important for earthquake disaster prevention and mitigation. Due to the lack of high wave number components in the source rupture process and velocity models, physics‐based ground motion simulation methods can only reliably produce low‐frequency ground motions (< ${< } $1 Hz).
Yuxing Pan, Nan Zang, Wei Zhang, Xiaofei Chen   +3 more
wiley   +1 more source