Results 21 to 30 of about 645 (179)

Study on the Elimination Method of Wind Field Influence in Retrieving a Sea Surface Current Field

Sensors, 2022
An along-the-track interferometric synthetic aperture radar (ATI-SAR) system can estimate the radial velocity of a moving target on the ground and on a sea surface current.
Xinzhe Yuan, Jian Wang, Bing Han, Xiaoqing Wang   +3 more
doaj   +1 more source

Waves from compact SeaSonde® High Frequency radars in the southeastern Bay of Biscay: measurement performance under different noise and wind conditions

Frontiers in Marine Science
Global concern on extreme events is increasing the need for real time monitoring of the wave fields in coastal areas. High Frequency (HF) radars, a remote sensing technology widely applied to measure near real time surface coastal currents with ...
Lohitzune Solabarrieta, Maria Fernandes, Irene Ruiz, Macu Ferrer, Pedro Liria, Iñaki de Santiago, Jorge Sánchez, Jose Antonio Aranda, Anna Rubio   +8 more
doaj   +1 more source

Coast–Ship Bistatic HF Surface Wave Radar: Simulation Analysis and Experimental Verification

Remote Sensing, 2020
The coast−ship bistatic high-frequency surface wave radar (HFSWR) not only has the anti-interference advantages of the coast-based bistatic HFSWR, but also has the advantages of maneuverability and an extended detection area of the shipborne HFSWR.
Yonggang Ji, Jie Zhang, Yiming Wang, Chao Yue, Weichun Gong, Junwei Liu, Hao Sun, Changjun Yu, Ming Li   +8 more
doaj   +1 more source

A MIMO FMCW radar approach to HFSWR [PDF]

Advances in Radio Science, 2011
In this paper we propose one possible approach how to apply the concept of multiple-input multiple-output (MIMO) to monostatic Frequency Modulated Continuous Wave (FMCW) High-Frequency Surface Wave Radar (HFSWR) in a maritime environment.
J. O. Hinz, U. Zölzer
doaj   +1 more source

Validation and Evaluation of a Ship Echo-Based Array Phase Manifold Calibration Method for HF Surface Wave Radar DOA Estimation and Current Measurement

Remote Sensing, 2020
Shore-based phased-array HF radars have been widely used for remotely sensing ocean surface current, wave, and wind around the world. However, phase uncertainties, especially phase distortions, in receiving elements significantly degrade the performance ...
Chen Zhao, Zezong Chen, Jian Li, Fan Ding, Weimin Huang, Lingang Fan   +5 more
doaj   +1 more source

Research Progress on V2CTx MXene‐Based Composites: Synthetic Strategies, Structure Design, and Multifunctional Applications

Carbon Energy, EarlyView.
This review systematically and comprehensively summarizes the latest research progress on V2CTx MXene. Focusing on the structural design strategies, particularly the construction of the V2CTx‐based hetero‐composite structure. Furthermore, widespread applications including electrochemical energy storage and conversion, as well as photocatalytic ...
Wenjun Zhu, Minghai Zhao, Min Fan, Jianmin Luo, Jian Tian, Xinhui Xia, Wenkui Zhang, Xinyong Tao, Yanxian Jin, Yang Xia   +9 more
wiley   +1 more source

Crawling under the radar: Two novel Paulinella species expand knowledge about the ecology and evolution of a primary plastid‐containing amoeba lineage

Journal of Phycology, EarlyView.
Abstract The genus Paulinella represents a rare, independent case of primary endosymbiosis, providing a unique system to study the early stages of organelle evolution. Here, we expand current understanding of primary plastid endosymbiosis through the discovery and characterization of two novel photosynthetic amoebae, Paulinella marae sp. nov.
Julia Van Etten, Sungpil Han, John A. Burns, Duckhyun Lhee, Andrew C. Willoughby, Timothy G. Stephens, Erin Chille, Robin S. Sleith, Debashish Bhattacharya, Hwan Su Yoon   +9 more
wiley   +1 more source

Wave Height Mapping From HF Radar-Measured Surface Current Data Based on a Cascaded LSTM Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
High-frequency (HF) surface wave radar has been widely used for measuring sea surface current, but its accuracy and spatial coverage of sea wave measurement are limited. A wave height mapping method based on HF radar-measured surface currents is proposed
Yingwei Tian, Xinyi Ma, Jing Yang, Caijun Wang, Xujing Yan   +4 more
doaj   +1 more source

Progress towards an HF Radar Wind Speed Measurement Method Using Machine Learning

Remote Sensing, 2022
HF radars are now an important part of operational coastal observing systems where they are used primarily for measuring surface currents. Their use for wave and wind direction measurement has also been demonstrated.
Lucy R. Wyatt
doaj   +1 more source

Science Needs for a Terrestrial Biosphere Tipping Point Early Warning System

Reviews of Geophysics, Volume 64, Issue 4, December 2026.
Abstract Tipping points in the Earth system have the potential to cause major detrimental impacts to the biosphere and societies. Their inherent nonlinearity implies that even relatively small additional increases in external forcing might result in disproportionately large adjustments to components of the Earth system.
Jesse F. Abrams, Chris Huntingford, Sergei Petrovskii, Joshua E. Buxton, Helen Millman, Chris A. Boulton, Robert J. Parker, Cristina Ruiz Villena, Andrew M. Cunliffe, Joseph Clarke, Valerio Lucarini, Darren Ghent, Peter M. Cox, Timothy M. Lenton   +13 more
wiley   +1 more source