Results 71 to 80 of about 173,784 (296)

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

Threshold responses of floating meadow fish communities to floodplain forest cover in the lower Amazon River

Conservation Biology, EarlyView.
Abstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Sam Grinstead, Caroline C. Arantes, Kirk O. Winemiller, Leslie C. Kelso‐Winemiller, Jonas Alves de Oliveira, Miguel Petrere, Carlos Edwar Carvalho Freitas   +6 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

Photonics-based broadband radar for high-resolution and real-time inverse synthetic aperture imaging.

Optics Express, 2017
A photonics-based radar with generation and de-chirp processing of broadband linear frequency modulated continuous-wave (LFMCW) signal in optical domain is proposed for high-resolution and real-time inverse synthetic aperture radar (ISAR) imaging. In the
Fangzheng Zhang, Qingshui Guo, Ziqian Wang, Pei Zhou, Guoqiang Zhang, Jun Sun, S. Pan   +6 more
semanticscholar   +1 more source

Leveraging Earth Observation Data to Monitor Boat‐Based Recreational Fishing

Fish and Fisheries, EarlyView.
High‐resolution satellite imagery was applied to monitor daily patterns of recreational fishing vessels during a temporary fishing ban within a MPA. The satellite detections revealed fine‐scale spatio‐temporal trends not captured by AIS, including a sharp increase in vessel presence immediately after the ban was lifted and a concentration of activity ...
Javier Menéndez‐Blázquez, Mara Segovia, David March   +2 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

Synthetic aperture radar demonstration kit for signal processing education [PDF]

, 2007
A Synthetic Aperture Radar scale model has been developed to improve signal processing teaching. Based on low frequency ultrasound transmission, it is a low cost demonstration kit.
Besson, Olivier, Chaumette, Eric, Mouton, Bernard, Nouals, Claude, Vincent, François   +4 more
core   +1 more source

An effective ship detection approach combining lightweight networks with supervised simulation‐to‐reality domain adaptation

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Computer vision‐based ship detection using extensively labeled images is crucial for visual maritime surveillance. However, such data collection is labor‐intensive and time‐demanding, which hinders the practical application of newly built ship inspection systems. Additionally, well‐trained detectors are usually deployed on resource‐constrained
Ruixuan Liao, Yiming Zhang, Hao Wang, Linjun Lu, Zhengyi Chen, Xiaoyou Wang, Wenqiang Zuo   +6 more
wiley   +1 more source

Multimodal Mamba with multitask learning for building flood damage assessment using synthetic aperture radar remote sensing imagery

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Most post‐disaster damage classifiers perform best when destructive forces leave clear spectral or structural signatures. However, these signatures are often subtle or absent after inundation, where damage may be nonstructural and difficult to detect.
Yu‐Hsuan Ho, Ali Mostafavi
wiley   +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