Results 41 to 50 of about 6,415,065 (280)

SAR Image Generation of Ocean Surface Using Time-Divided Velocity Bunching Model [PDF]

Journal of the Korean Institute of Electromagnetic Engineering and Science, 2019
An efficient synthetic aperture radar (SAR) image formulation based on the velocity-bunching model is proposed for a large SAR image integration time. A time-varying ocean surface is generated based on the semi-empirical spectrum proposed by Fung and Lee.
Jae-Won Rim, Il-Suek Koh
doaj   +1 more source

Sea Echoes for Airborne HF/VHF Radar: Mathematical Model and Simulation

Remote Sensing, 2020
Currently, shore-based HF radars are widely used for coastal observations, and airborne radars are utilized for monitoring the ocean with a relatively large coverage offshore.
Fan Ding, Chen Zhao, Zezong Chen, Jian Li   +3 more
doaj   +1 more source

Dependence of the normalized radar cross section of water waves on Bragg wavelength-wind speed sensitivity [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 1996
Measurements of the normalized radar cross section (/spl sigma//spl deg/) made by the YSCAT ultrawideband scatterometer during an extended deployment on the Canada Centre for Inland Waters (CCIW) Research Tower located at Lake Ontario are analyzed and compared with anemometer wind measurements to study the sensitivity of /spl sigma//spl deg/ to the ...
David G. Long, R. Scott Collyer, David V. Arnold   +2 more
openaire   +1 more source

QuikSCAT normalized radar cross section noise characterization for coastal wind field retrieval : OSI VS20 03

, 2021
30 pages, 10 figuresAn assessment of the noise affecting the QuikSCAT Normalized Radar Cross Sections (σ0s) is carried out in this study. The estimation of Kp ( ˆKp) is compared to the median of the Kp values ( ̃Kp) provided in the Level 1B Full ...
Vogelzang, Jur, Portabella, Marcos, Verhoef, Anton, Stoffelen, Ad, Grieco, Giuseppe   +4 more
core  

Sea Wind Measurement by Doppler Navigation System with X-Configured Beams in Rectilinear Flight

Remote Sensing, 2017
We suggest a conceptual approach to the measurement of the near-surface wind vector over water using a Doppler navigation system, in addition to its standard navigation capabilities. We consider a Doppler navigation system with a track-stabilized antenna
Alexey Nekrasov, Alena Khachaturian, Mária Gamcová, Pavol Kurdel, Viktor Obukhovets, Vladimir Veremyev, Mikhail Bogachev   +6 more
doaj   +1 more source

Tropical Cyclone Winds Retrieved From Synthetic Aperture Radar [PDF]

Oceanography, 2013
This paper describes algorithms used to retrieve high-resolution wind fields in tropical cyclone conditions from synthetic aperture radar (SAR) data acquired at C-band with either co-polarization or cross-polarization.
General Dynamics Advanced Information Systems, Christopher Wackerman, Jochen Horstmann, Salvatore Maresca   +3 more
doaj   +1 more source

Retrieval of the two-dimensional slope field by the SWIM spectrometer of the CFOSAT satellite: discussion of the algorithm

Russian Journal of Earth Sciences, 2022
In October 2018, the Chinese-French satellite CFOSAT was launched into low-earth orbit, which carries the French SWIM spectrometer and the Chinese scatterometer RFSCAT. The SWIM (Ku-band) spectrometer measures the normalized radar cross section (NRCS) at
Karaev Vladimir, Panfilova M., Ryabkova M., Titchenko Yu., Meshkov E., Li X.   +5 more
doaj   +1 more source

Normalized Radar Scattering Section Simulation and Numerical Calculation of Freak Wave

Journal of Marine Science and Engineering, 2022
The improved phase modulation method is used to numerically simulate a two-dimensional freak wave. While generating freak waves at specific positions, the spectral structure of the target spectrum can also be maintained, and the statistical ...
Gengkun Wu, Bin Liu, Lichen Han
doaj   +1 more source

Reservoir‐Driven Neuromorphic Computing Based on Composite Rare‐Earth/Transition Metal Oxide Memristor

Advanced Functional Materials, EarlyView.
A defect‐engineered Ag/Gd2O3:Nb2O5/Pt rare earth composite oxide memristor enables stable multilevel reservoir states through pulse driven conductance modulation. Experimentally measured device responses are incorporated into a device aware reservoir computing framework for CIFAR‐100 image classification, highlighting the potential of rare earth ...
Hammad Ghazanfar, Haider Abbas, Muhammad Rabeel, Honggyun Kim, Ghulam Dastgeer, Muhammad Nasim, Furqan Zahoor, Yawar Abbas, Waqas Ahmad, Deok‐kee Kim   +9 more
wiley   +1 more source

Electrolyte Design for Fast‐Charging Lithium‐Based Batteries

Advanced Materials, EarlyView.
A decade of progress in fast‐charging electrolytes for lithium batteries is reviewed. Electrolyte design strategies spanning solvents, salts, additives, and advanced systems, such as localized high‐concentration electrolytes (LHCEs), are summarized. Advanced diagnostic tools for lithium plating and interphase chemistry are discussed, with perspectives ...
Chen Liu, Zehao Cui, Arumugam Manthiram
wiley   +1 more source