Results 61 to 70 of about 46,278 (262)

Interferometric baseline performance estimations for multistatic synthetic aperture radar configurations derived from GRACE GPS observations

, 2006
Recent studies have demonstrated the usefulness of global positioning system (GPS) receivers for relative positioning of formation-flying satellites using dual-frequency carrier-phase observations. The accurate determination of distances or baselines
D'Amico, Simone, Kohlhase, A. O., Kroes, R.   +2 more
core   +1 more source

Tracking Wintertime Behaviour of Emperor Penguins Using High‐Resolution Synthetic Aperture Radar Imagery

Remote Sensing in Ecology and Conservation, EarlyView.
Using 25–30 cm Umbra synthetic aperture radar (SAR) imagery combined with ground validation of our observations, we introduce a method to track the phenology of emperor penguins during the Antarctic winter. We successfully identified events in the breeding cycle, which were previously impossible to observe during the complete darkness of Antarctic ...
Michelle LaRue, Daniel Price, Sarah Wiki‐Bennett, Charles K. Lee, B. Jack Pan, Kyle McCloud, Heather Cruickshank, Alex Ponniah, Daniel Zitterbart, Alexander Winterl, Céline Le Bohec, Rose Foster‐Dyer, Peter Fretwell   +12 more
wiley   +1 more source

Deep Learning Training Data for Phase Unwrapping of SAR Interferograms [PDF]

Geo Data
Phase unwrapping is an essential process in synthetic aperture radar interferometry that restores phase signals constrained within the range of (-π, π) to their true phase values.
Won-Kyung Baek, Hyung-Sup Jung
doaj   +1 more source

Polysulfide Immobilization and Sulfur Conversion Kinetics Promotion via a Tetrathiafulvalene–Crown Ether COF@Graphene Layer for High‐Rate Lithium–Sulfur Batteries

Small, EarlyView.
A polysulfide‐regulating covalent organic framework (TUS‐44) integrating tetrathiafulvalene and crown‐ether linkers forms an electron‐delocalized, ion‐coordinative network that synergistically mediates Li–S redox chemistry. When interfaced with graphene, the TUS‐44@G layer functions as a catalytic and chemisorptive interface, enabling efficient ...
Kai Sun, Tsukasa Irie, Samim Reza, Kohki Sasaki, Mika Nozaki, Tokuhisa Kawawaki, Yujun Fu, Dequan Liu, Ranjit Thapa, Saikat Das, Deyan He, Yuichi Negishi   +11 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

Modelling the Four‐Dimensional Power Line Sag Dynamics by Point Signature in Time‐Series Synthetic‐Aperture Radar Images

High Voltage, EarlyView.
ABSTRACT Power lines in synthetic‐aperture radar (SAR) images are reflected as point signatures, which fluctuate annually in both the azimuth and range directions. A novel framework is proposed in this paper to evaluate the four‐dimensional dynamic status of power line sag using those point signatures in time‐series SAR images.
Sijie Ma, Tao Li, Mahdi Motagh, Yan Liu, Yangmao Wen   +4 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

On the remote sensing of oceanic and atmospheric convection in the Greenland Sea by synthetic aperture radar

, 2004
In this paper we discuss characteristic properties of radar signatures of oceanic and atmospheric convection features in the Greenland Sea. If the water surface is clean (no surface films or ice coverage), oceanic and atmospheric features can become ...
Mitnik, Leonid, Wehde H, Rubino A, Wehde, Henning, Romeiser R, Romeiser, Roland, Kern, Stefan, Kern S, Ufermann S, Androssov, Ufermann, Susanne, Rubino, Angelo, Androssov, Alexei, Mitnik L   +13 more
core   +1 more source

Does AI Affect the Democratic Conduct of War? Analyzing US and Israeli Military AI Deployment

Global Policy, EarlyView.
ABSTRACT This study examines how the use of decision‐support military Artificial Intelligence (AI) systems can affect the democratic conduct of warfare. AI can challenge the democratic conduct of warfare by introducing systemic risks such as reduced oversight, opacity, and automation bias.
Alessandra Russo
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