Results 21 to 30 of about 25,983 (199)

Visualisation and interpretation of PolSAR data based on polarimetric coherence

The Journal of Engineering, 2019
Polarimetric coherence strongly relates to the target scattering characteristics. Coherences of different second-order statistics show different advantages in target discrimination in specific correspondence to physical scattering mechanism.
Liting Liang, Yunhua Zhang, Yunhua Zhang, Dong Li   +3 more
doaj   +1 more source

Turbulence‐resolving simulations of Hurricane Laura (2020): Insights into extreme winds and eyewall turbulence

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Using high‐resolution turbulence‐resolving simulations, we analyze the wind structure in the eyewall of Hurricane Laura (2020) and validate the results with observational data. Our findings show significant variations in wind speed and turbulence, especially above 50 m.
Miguel Sanchez‐Gomez, Georgios Deskos, Julie K. Lundquist   +2 more
wiley   +1 more source

Few‐shot learning for satellite characterisation from synthetic inverse synthetic aperture radar images

IET Radar, Sonar & Navigation
Space situational awareness systems primarily focus on detecting and tracking space objects, providing crucial positional data. However, understanding the complex space domain requires characterising satellites, often involving estimation of bus and ...
Friso G. Heslinga, Faruk Uysal, Sabina B. vanRooij, Sven Berberich, Miguel Caro Cuenca   +4 more
doaj   +1 more source

Soft Segmented Randomization: Enhancing Domain Generalization in SAR ATR for Synthetic-to-Measured

IEEE Access
Synthetic aperture radar technology is crucial for high-resolution imaging under various conditions; however, the acquisition of real-world synthetic aperture radar data for deep learning-based automatic target recognition remains challenging due to high
Minjun Kim, Ohtae Jang, Haekang Song, Heesub Shin, Jaewoo Ok, Minyoung Back, Jaehyuk Youn, Sungho Kim   +7 more
doaj   +1 more source

Aerial Localization and Navigation for Surveillance of Large, Featureless, GNSS‐Denied Maritime Environments

Journal of Field Robotics, EarlyView.
ABSTRACT In this study, we tackle the problem of surveilling a large area over the sea without access to the global navigation satellite system (GNSS) while searching for the known target vessel. The system utilizes an unmanned aerial vehicle (UAV) equipped with long‐range radio frequency (LoRa) localization and an RGB camera to detect the target ...
Marijana Peti, Lovro Marković, Ivan Lončar, Antonella Barišić Kulaš, Frano Petric, Ana Milas, Jurica Goričanec, Marko Car, Matko Orsag, Barbara A. Ferreira, Stjepan Bogdan   +10 more
wiley   +1 more source

Exploring Distributed Scatterers Interferometric Synthetic Aperture Radar Attributes for Synthetic Aperture Radar Image Classification

Remote Sensing
Land cover classification of Synthetic Aperture Radar (SAR) imagery is a significant research direction in SAR image interpretation. However, due to the unique imaging methodology of SAR, interpreting SAR images presents numerous challenges, and land ...
Mingxuan Wei, Yuzhou Liu, Chuanhua Zhu, Chisheng Wang   +3 more
doaj   +1 more source

Prioritized Real‐Time UAV‐Based Vessel Detection for Efficient Maritime Search

Journal of Field Robotics, EarlyView.
ABSTRACT Real‐time vessel detection in maritime environments is crucial for diverse applications requiring speed and accuracy. Static camera views often introduce blind spots, compromising detection efficiency. This paper proposes a novel, real‐time UAV‐based system that uses a dynamic camera control strategy to address this limitation.
Lyes Saad Saoud, Zikai Jia, Siyuan Yang, Muhayy Ud Din, Lakmal Seneviratne, Shaoming He, Irfan Hussain   +6 more
wiley   +1 more source

Quantifying aboveground herbaceous biomass in grassy ecosystems: a comparison of field and high‐resolution UAV‐LiDAR approaches

Remote Sensing in Ecology and Conservation, EarlyView.
The abundance of herbaceous vegetation in grassy ecosystems—which cover >25% of the world's land surface—is highly variable and impacts key ecological processes including carbon sequestration and support for grazing wildlife and livestock. Here, we present a method for using high‐resolution, UAV‐borne Light Detection and Ranging (LiDAR) to estimate ...
Tyler C. Coverdale, Peter B. Boucher, Jenia Singh, Andrew B. Davies   +3 more
wiley   +1 more source

Unsupervised change detection method in SAR images based on deep belief network using an improved fuzzy C‐means clustering algorithm

IET Image Processing, 2021
Deep learning methods have recently displayed ground‐breaking results for synthetic aperture radar image change detection problem. However, they still face the challenges of intrinsic noise and the difficulty of acquiring labeled data.
Sanae Attioui, Said Najah
doaj   +1 more source

Covalent Organic Framework Nanofilm Heterojunctions: Lamination Effect and Suppressed Self‐Discharge in Flexible Micro‐Supercapacitors Energy Storage

Small, EarlyView.
Tailored sandwich‐type COF heterojunctions achieve optimal capacitance and energy density through H⁺ ion lamination and π‐electron conduction, demonstrating the potential for miniaturized and flexible energy storage devices. Abstract Covalent organic frameworks (COFs) nanofilms with well‐ordered channels and highly active interfaces have great ...
Xiaoyang Xu, Tian Li, Ruijuan Zhang, Zihao Zhang, Wei Cao, Yue Wang, Yongqi Hu, Xinying Liu, Shanlin Qiao   +8 more
wiley   +1 more source