Results 61 to 70 of about 71,530 (301)

A model for gravity-wave spectra observed by Doppler sounding systems [PDF]

, 1986
A model for Mesosphere - Stratosphere - Troposphere (MST) radar spectra is developed following the formalism presented by Pinkel (1981). Expressions for the one-dimensional spectra of radial velocity versus frequency and versus radial wave number are ...
Vanzandt, T. E.
core   +1 more source

Where numerical weather prediction meets large‐eddy simulations in a convective boundary layer during the FESSTVaL field experiment

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We exploit the Field Experiment on Sub‐mesoscale Spatio‐Temporal Variability in Lindenberg (FESSTVaL) to compare the performance of an NWP model at sub‐km resolutions with a traditional LES model. Focusing on clear‐sky ABL turbulence (June 14), shallow convective clouds and surface radiation (June 27), and deep convective cold pools (June 29), we find ...
Mirjana Sakradzija, Maike Ahlgrimm, Frank Beyrich, Chiel van Heerwaarden, Eileen Päschke, Ulrich Görsdorf, Bastian Kirsch, Juerg Schmidli, Noviana Dewani   +8 more
wiley   +1 more source

S-Band Doppler Wave Radar System [PDF]

Remote Sensing, 2017
In this paper, a novel shore-based S-band microwave Doppler coherent wave radar (Microwave Ocean Remote SEnsor (MORSE)) is designed to improve wave measurements. Marine radars, which operate in the X band, have been widely used for ocean monitoring because of their low cost, small size and flexibility.
Zezong Chen, Zihan Wang, Xi Chen, Chen Zhao, Fei Xie, Chao He   +5 more
openaire   +3 more sources

Advancing the mapping of vegetation structure in savannas using Sentinel‐1 imagery

Remote Sensing in Ecology and Conservation, EarlyView.
As vegetation structure monitoring is important for the understanding and conservation of savanna ecosystems, we explored the utility of C‐band synthetic aperture radar imagery for mapping both grassland and woody vegetation structure in the Greater Serengeti‐Mara Ecosystem.
Vera Thijssen, Marianthi Tangili, Ruth A. Howison, Han Olff   +3 more
wiley   +1 more source

Measuring River Surface Velocity Using UAS‐Borne Doppler Radar

Water Resources Research
Using Unoccupied Aerial Systems (UAS) equipped with optical RGB cameras and Doppler radar, surface velocity can be efficiently measured at high spatial resolution.
Zhen Zhou, Laura Riis‐Klinkvort, Emilie Ahrnkiel Jørgensen, Christine Lindenhoff, Monica Coppo Frías, Alexander Rietz Vesterhauge, Daniel Haugård Olesen, Makar Lavish, Alexey Dobrovolskiy, Alexey Kadek, Niksa Orlic, Tomislav Grubesa, Luka Drmić, Henrik Grosen, Sune Nielsen, Daniel Wennerberg, Viktor Fagerström, Jenny Axén, David Gustafsson, Peter Bauer‐Gottwein   +19 more
doaj   +1 more source

Application of S-Transform Random Consistency in Inverse Synthetic Aperture Imaging Laser Radar Imaging

Applied Sciences, 2019
Under the same principle, laser radar could be more sensitive to the micro-Doppler (m-D) effect due to its wave length, as the characteristic of multi-resolution, S transform could reduce the influence of the micro-Doppler component and enhance the ...
Bo Zang, Mingzhe Zhu, Xianda Zhou, Lu Zhong, Zijiao Tian   +4 more
doaj   +1 more source

Dynamic Hand Gesture Classification Based on Radar Micro-Doppler Signatures [PDF]

, 2016
Dynamic hand gesture recognition is of great importance for human-computer interaction. In this paper, we present a method to discriminate the four kinds of dynamic hand gestures, snapping fingers, flipping fingers, hand rotation and calling, using a ...
Fioranelli, Francesco, Griffiths, Hugh, Li, Gang, Ritchie, Matthew, Zhang, Shimeng   +4 more
core   +2 more sources

An observational study of a circular gust front over the Yangtze Delta, China

Weather, EarlyView.
Concentric gust fronts are formed when a thunderstorm's downdraft reaches the ground and the outflow from the cold pool spreads uniformly outwards into the surrounding warm and humid air mass. Observational evidence presented here show the case of narrow‐band echoes forming a ring around a thunderstorm.
Wenjie Zhou, Wendong Hu, Jianhua Dai, Puyuan Du, Lu Lu, Yongkai Zhang, Yanqiong Hao   +6 more
wiley   +1 more source

Target separation detection and motion parameter estimation method based on time-varying autoregressive model

The Journal of Engineering, 2019
The authors report a target separation detection and motion parameter estimation method based on the time-varying autoregressive (TVAR) model. The TVAR model is used to extract the instantaneous Doppler frequencies of multiple targets or scattering ...
Yaolin Zhang, Yuhao Yang, Qiang Cheng, Yanjun Hao   +3 more
doaj   +1 more source

High Frequency Radar Wind Turbine Interference Community Working Group Report [PDF]

, 2019
Land-based High Frequency (HF) Radars provide critically important observations of the coastal ocean that will be adversely affected by the spinning blades of utility-scale wind turbines.
Cahl, Douglas, Emery, Brian, Kirincich, Anthony R., Kosro, Mike, Roarty, Hugh, Trockel, Dale, Washburn, Libe, Whelan, Chad   +7 more
core   +1 more source