Results 31 to 40 of about 182,284 (271)

A Quality Control Concept for Radar Reflectivity, Polarimetric Parameters, and Doppler Velocity [PDF]

, 2006
Over the last few years the use of weather radar data has become a fundamental part of various applications like rain-rate estimation, nowcasting of severe weather events, and assimilation into numerical weather prediction models.
Friedrich, Katja, Einfalt, Thomas, Hagen, Martin   +2 more
core   +1 more source

A Cognitive Beamforming Method via Range-Doppler Map Features for Skywave Radar

Remote Sensing, 2022
For skywave over-the-horizon radar, beamforming techniques are often used to suppress airspace radio frequency interference because the high-frequency band is shared by many devices.
Zhenshuo Lei, Hui Chen, Zhaojian Zhang, Gaoqi Dou, Yongliang Wang   +4 more
doaj   +1 more source

Over-the-horizon aircraft detection using skywave AM-radio broadcast signals

, 2015
We present the preliminary experimental results of a collaborative research project to determine the feasibility of using AM-radio broadcasts of opportunity for aircraft detection at ranges of thousands of kilometers from a terrestrial receiver.
Ng, B., Lim, C., Spencer, N., Thomolaris, J., Fabrizio, G.   +4 more
core   +1 more source

Performance Comparison between Deep Learning and Optical Flow-Based Techniques for Nowcast Precipitation from Radar Images

Forecasting, 2020
In this article, a nowcasting technique for meteorological radar images based on a generative neural network is presented. This technique’s performance is compared with state-of-the-art optical flow procedures.
Marino Marrocu, Luca Massidda
doaj   +1 more source

The structure of the construction of a radar receiver for over-the-horizon detection [PDF]

EPJ Web of Conferences
The article provides information on the tasks of the over-thehorizon detection system, provides brief information on over-the-horizon radars of Russia. The foreign experience of building over-the-horizon detection systems is analyzed.
Litvinov Svyatsolav, Khamkin Nikita, Nanay Farida   +2 more
doaj   +1 more source

Initial results from an experimental skew-fire Mode-Selective over-the-horizon-radar

, 2014
The use of skywave over-the-horizon radar for the detection and tracking of ships is significantly more challenging than the equivalent task for aircraft.
Frazer, G.J., Y. I. Abramovich, Abramovich, Y., Heitmann, A., G. J. Frazer, A. J. Heitmann   +5 more
core   +1 more source

Flexible Chemiresistive Chitosan‐Glycerol Sensors on Laser‐Induced Graphene Electrodes for Room‐Temperature Ammonia Detection

Advanced Materials Technologies, EarlyView.
Flexible Chitosan‐glycerol sensor integrated with porous laser‐induced graphene (LIG) electrodes enable room‐temperature chemiresistive detection of ammonia (NH3) and proof‐of‐concept detection of fish spoilage. ABSTRACT We report a metal‐free sensor platform combining laser induced graphene (LIG) electrodes with drop‐deposited, glycerol‐plasticized ...
Mintesinot Tamiru Mengistu, Richard Murray, Cara‐Lena Nies, Cathal Larrigy, Martina Piletti, Jahidul Islam, Daniela Iacopino, Eileen Hurley, Michael Nolan, Aidan J. Quinn   +9 more
wiley   +1 more source

Schooling Trajectories and the Development of Brain Dynamics: A Comparative Study of Montessori and Traditional Education

Advanced Science, EarlyView.
We investigate whether Montessori and traditional schooling systems shape the developmental trajectory of large‐scale brain dynamics in different ways. We quantify the arrow of time (“non‐reversibility”) in neural activity during resting state and movie‐watching, revealing distinct maturational patterns.
Elvira del Agua, Anira Escrichs, Yonatan Sanz Perl, Morten L. Kringelbach, Adele Diamond, Solange Denervaud, Gustavo Deco   +6 more
wiley   +1 more source

A CFAR Detector Based on a Robust Combined Method With Spatial Information and Sparsity Regularization in Non-Homogeneous Weibull Clutter

IEEE Access, 2018
In over-the-horizon radar (OTHR), atmospheric noise and sea clutter exist in different regions of Range-Doppler map. To improve the detection performance, a combined method is proposed to identify the cell-under-test (CUT) and estimate the parameters of ...
Yang Li, Longshan Wu, Ning Zhang
doaj   +1 more source

Observationally constrained surface mass balance of Larsen C ice shelf, Antarctica [PDF]

The Cryosphere, 2017
The surface mass balance (SMB) of the Larsen C ice shelf (LCIS), Antarctica, is poorly constrained due to a dearth of in situ observations. Combining several geophysical techniques, we reconstruct spatial and temporal patterns of SMB over the LCIS ...
P. Kuipers Munneke, D. McGrath, D. McGrath, B. Medley, A. Luckman, S. Bevan, B. Kulessa, D. Jansen, A. Booth, P. Smeets, B. Hubbard, D. Ashmore, M. Van den Broeke, H. Sevestre, K. Steffen, A. Shepherd, N. Gourmelen   +16 more
doaj   +1 more source