Results 61 to 70 of about 1,046 (220)

Study on the Detectability of the Sky-Surface Wave Hybrid Radar

Journal of Applied Mathematics, 2014
Working in the HF (high-frequency) band and the transmitter and receiver locating separately, the sky-surface wave hybrid radar both has the capabilities of the OTHR (over-the-horizon radar) and the advantage of the bistatic radar. As the electromagnetic
Hou Chengyu, Ke Guo, Shi Tiange, Wang Yuxin   +3 more
doaj   +1 more source

Large Drifter Experiment in the Western Mediterranean Sea Reveals Dynamical Versus Noise Contributions in SWOT‐KaRIn Sea Level

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The wide‐swath altimeter Surface Water and Ocean Topography (SWOT) provides unprecedented two‐dimensional sea‐level observations, whose ability to capture upper‐ocean dynamics requires assessment. The dynamically balanced signal and noise contributions in SWOT‐KaRIn Level‐3 (L3) sea level products are here originally quantified and contrasted ...
Margot Demol, Aurélien L. Ponte, Pierre Garreau, M. Bellacicco, Maristella Berta, L. R. Centurioni, Andrea M. Doglioli, Aude Joël, Baptiste Mourre, Ananda Pascual   +9 more
wiley   +1 more source

Temporal evolution of pump beam self-focusing at the High-Frequency Active Auroral Research Program [PDF]

, 2007
On 4 February 2005 the High-Frequency Active Auroral Research Program (HAARP) facility was operated at 2.85 MHz to produce artificial optical emissions in the ionosphere while passing through the second electron gyroharmonic.
Gerken-Kendall, E., Pedersen, T., Kosch, Mike J., Mishin, E., Watkins, B., Starks, M., Oyama, S., Sentman, D.   +7 more
core  

Sea surface conductivity inversion with HF surface wave radar

, 2014
Besides temperature and pressure, conductivity is among the most relevant parameters characterizing the physical state of seawater. By analyzing distribution and variability of water electrical conductivity, people can research on electromagnetic ...
Wu, Xiongbin, Zhang, Lan, Li, Yan, 张兰, 李炎, Chen, Xiaofeng   +5 more
core   +1 more source

MXene‐Coated 3D Printed Horn Antennas for Ku Frequency Band

Advanced Materials Technologies, Volume 11, Issue 9, 6 May 2026.
An additive manufacturing approach to 3D printing horn antennas and coating them with Ti3C2Tx MXene is proposed. Rapid fabrication of lightweight, high‐performance antennas operating in the Ku‐band (12.4–18 GHz) has been demonstrated. The MXene‐coated antennas exhibit comparable electromagnetic performance to conventional, costly aluminum ones, with ...
Zahra Sarpanah Sourkouhi, Jamal Alhourani, Yury Gogotsi, Mohammad H. Zarifi   +3 more
wiley   +1 more source

A surface wave radar simulator

, 2016
International audienceThis paper deals with the problem of HF surface wave radar. The goal is to integrate in a unique tool the antenna radiation and the propagation calculations in order to make the analysis ...
Hélier, Marc, Beniguel, Yannick, Reineix, Alain, Pouliguen, Philippe, Marc Helier, Alain Reineix, Muriel Darces, Philippe Pouliguen, Yannick Beniguel, Darces, Muriel   +9 more
core   +1 more source

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

IET Radar, Sonar & Navigation, 2023
A great interest has been directed towards high frequency surface wave radar (HFSWR), because it is applied as long‐range early warning and real‐time measurements of sea surface condition tools in maritime surveillance.
Xiaowei Ji, Xiaochuan Wu, Qiang Yang, Xin Zhang   +3 more
doaj   +1 more source

Knowledge-Based Multitarget Ship Tracking for HF Surface Wave Radar Systems [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2015
These last decades spawned a great interest toward low-power high-frequency (HF) surface-wave (SW) radars for ocean remote sensing. By virtue of their over-the-horizon coverage capability and continuous-time mode of operation, these sensors are also effective long-range early warning tools in maritime situational awareness applications providing an ...
Gemine Vivone, Paolo Braca, Jochen Horstmann   +2 more
openaire   +3 more sources

Why Autonomous Vehicles Are Not Ready Yet: A Multi‐Disciplinary Review of Problems, Attempted Solutions, and Future Directions

Journal of Field Robotics, Volume 43, Issue 3, Page 2254-2341, May 2026.
ABSTRACT Personal autonomous vehicles can sense their surrounding environment, plan their route, and drive with little or no involvement of human drivers. Despite the latest technological advancements and the hopeful announcements made by leading entrepreneurs, to date no personal vehicle is approved for road circulation in a “fully” or “semi ...
Xingshuai Dong, Massimiliano Cappuccio, Fady Alnajjar, Luqman Ali, Hamad Al Jassmi, Essam Debie, Milad Ghasrikhouzani, Alessandro Lanteri, Tate McGregor, Oleksandra Molloy, Alice Plebe, Michael Regan, Eduardo Sandoval, Dongmo Zhang   +13 more
wiley   +1 more source

“Caterpillar” ULF Waves in the Dusk Side Sub‐Auroral Region: Conjugate Observations With SuperDARN, Arase and Ground Magnetometers

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract On 23 November 2022, during exceptionally quiet geomagnetic conditions, a distinct ultra‐low frequency (ULF) wave in the Pc5 band (∼2.4 mHz) was observed in the duskside sub‐auroral region by two Canadian SuperDARN (Super Dual Auroral Radar Network) radars.
N. Nishitani, K. Hosokawa, T. Hori, M. Teramoto, P. V. Ponomarenko, A. Shinbori, Y. Obana, A. S. Yukimatu, G. Hussey, Y. Miyoshi, A. Matsuoka, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, S. Nakamura, I. Shinohara, Y. Zhang, L. Paxton   +18 more
wiley   +1 more source