Results 51 to 60 of about 6,503 (283)

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

Thermospheric atomic oxygen density estimates using the EISCAT Svalbard Radar [PDF]

, 2013
[1] Coupling between the ionized and neutral atmosphere through particle collisions allows an indirect study of the neutral atmosphere through measurements of ionospheric plasma parameters. We estimate the neutral density of the upper thermosphere above ~
Sutton, E., La Hoz, C., E. Sutton, C. La Hoz, H. Vickers, Ogawa, Y., Y. Ogawa, Vickers, Hannah, Kosch, M. J., M. J. Kosch, Vickers, H., La Hoz, Cesar   +11 more
core   +1 more source

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

A two-parameter wind speed algorithm for Ku-band altimeters [PDF]

, 2002
Globally distributed crossovers of altimeter and scatterometer observations clearly demonstrate that ocean altimeter backscatter correlates with both the near-surface wind speed and the sea state.
Moat, B.I., Escobedo, João Francisco, Vandemark, D., Dijk, A., van, Lefevre, Fabien, Gommenginger, C.P., Roget, Elena, Tabary, Pierre, Kelly, P., G. P. Gommenginger, Pan, NX, Berry, D.I., Piera, Jaume, Barnaba, F., Kazantzidis, A., Gobbi, G.P., Gourrion, J., Webb, Ann, Machado, A. J., J. Gourrion, Schallhart, B., Schmitt, R., von Hünerbein, S, Cipollini, P., van Dijk, A., F. H. Lyard, Escobedo, João Francisco [UNESP], Challenor, P.G., Pascal, R.W., D. Vandemark, Junkermann, W., Blumthaler, M, E. J. O. Schrama, Chapron, B., Visbeck, Martin, Petitdidier, Monique, B. Chapron, Schreder, J., Liberti, G. L., P. G. Challenor, Schrama, Ernest J. O., Bailey, S., Thiel, S., C. Le Provost, Kift, R.; id_orcid, Catalán, Jordi, Topaloglou, C., Piera Fernàndez, Jaume, Wolff, Eric W., Lyard, Florent, Kylling, A., Danielsen, T., Srokosz, M.A., Bais, A.F., Ponte, R. M., S. Bailey, Catalán Aguilà, Jordi, Yelland, M.J., F. Lefèvre, Le Provost, C., Rankin, Andrew M., Richner, H, M. A. Srokosz, Cromwell, D., de Oliveira, A. P., Misslbeck, M.   +65 more
core   +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

Ka-Band Radar Cross-Section of Breaking Wind Waves

, 2021
The effective normalized radar cross section (NRCS) of breaking waves, σwb, is empirically derived based on joint synchronized Ka-band radar and video records of the sea surface from a research tower.
Vladimir N. Kudryavtsev, Semyon A. Grodsky, Bertrand Chapron, Grodsky, Semyon A., Yury Yu. Yurovsky, Kudryavtsev, Vladimir N., Yurovsky, Yury Yu., Chapron, Bertrand   +7 more
core   +1 more source

Machine Learning‐Assisted Inverse Design of Soft and Multifunctional Hybrid Liquid Metal Composites

Advanced Functional Materials, EarlyView.
A machine learning framework is presented for inverse design of synthesizable multifunctional composites containing both liquid metal and solid inclusions. By integrating physics‐based modeling, data‐driven prediction, and Bayesian optimization, the approach enables intelligent design of experiments to identify optimal compositions and realize these ...
Lijun Zhou, Yunsik Ohm, Ren‐Mian Chin, Olivia Kerr, Krithika Manohar, Mohammad H. Malakooti   +5 more
wiley   +1 more source

Weaving Intelligence: Thermally Drawn Multimaterial Fibers Toward AI‐Enabled Smart Textiles

Advanced Materials, EarlyView.
Thermally drawn multimaterial fibers are rapidly advancing as intelligent structural units for next‐generation smart textiles. Integrating multimaterial architectures with neuromorphic and spiking‐neural‐network principles enables fabrics that can sense, compute, and adapt autonomously.
Vuong Dinh Trung, Jiaxiang Yi, Hieu Nguyen‐Duc, Tien Nu Hoang Lo, Weili Zhao, Chaoqun Dong, Fabien Sorin, Baris Caglar, Lei Wei, Tung Nguyen‐Dang   +9 more
wiley   +1 more source

ANALYTICAL FORMULAE FOR RADAR CROSS SECTION OF FLAT PLATES IN NEAR FIELD AND NORMAL INCIDENCE [PDF]

Progress In Electromagnetics Research B, 2008
Radar Cross Section is most of the time defined in far field. In that case, RCS is totally independent of the range between the radar and the target. However, in several kinds of military scenario, it can be more realistic to deal with the target nearfield scattering characteristics.
Philippe Pouliguen, Régis Hémon, Christophe Bourlier, Jean-Francois Damiens, Joseph Saillard   +4 more
openaire   +1 more source