Results 71 to 80 of about 69,955 (288)

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

A 1D Cascaded Denoising and Classification Framework for Micro-Doppler-Based Radar Target Recognition

Remote Sensing
Micro-Doppler signatures play a crucial role in capturing target features for the radar classification task, and the time–frequency distribution method is widely used to represent micro-Doppler signatures in many applications including human activities ...
Beili Ma, Baixiao Chen
doaj   +1 more source

Differential reflectivity columns and hail: Linking C‐band radar‐based estimated column characteristics to crowdsourced hail observations in Switzerland

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Differential reflectivity columns (ZDRC$$ {Z}_{\mathrm{DR}}C $$) have been detected automatically on a composite of radar data derived from five operational C‐band dual‐polarization Doppler weather radars in Switzerland. The characteristics of the detected ZDRC$$ {Z}_{\mathrm{DR}}C $$ are linked to a large sample of 173,000 crowdsourced hail ...
Martin Aregger, Olivia Martius, Urs Germann, Alessandro Hering   +3 more
wiley   +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

Total energy conservation for explaining discrepancies between field observations and the traditional thermal energy balance

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Motivated by discrepancies between field observations and the traditional thermal energy balance derived from the first law of thermodynamics, total energy conservation is applied to derive a generalized thermal energy balance for atmospheric applications. Total energy conservation accounts for all forms of energy variation, including kinetic, thermal,
Jielun Sun, Joseph Tribbia
wiley   +1 more source

Chung-Li, Taiwan dual mode (Doppler and spaced antenna) VHF radar: Preliminary specifications [PDF]

, 1983
A major unresolved question in the field of atmospheric research using VHF radar techniques is the relative merit of the two most widely used systems. These systems are the Doppler method and the spaced antenna method.
Brosnahan, J. W., Chao, J., Rottger, J.
core   +1 more source

Implementation of polarization diversity pulse-pair technique using airborne W-band radar [PDF]

, 2019
This work describes the implementation of polarization diversity on the National Research Council Canada W-band Doppler radar and presents the first-ever airborne Doppler measurements derived via polarization diversity pulse-pair processing.
A. Battaglia, A. Battaglia, A. Illingworth, A. L. Pazmany, C. Nguyen, M. Wolde   +5 more
core   +2 more sources

Rapid versus slow intensification of idealized tropical cyclones using soundings from reanalysis

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Climatologically averaged environmental wind and moisture around intensifying tropical cyclones are used in an idealized model to further discriminate differences between ensembles of rapidly (RI) and slowly (SI) intensifying storms. On average, RI storms have lower vertical tilt, are more axisymmetric, and less ventilated at onset than SI storms, and ...
Samantha Nebylitsa, David S. Nolan, Brian D. McNoldy, Sharanya J. Majumdar   +3 more
wiley   +1 more source

Polarimetric Doppler Weather Radar [PDF]

Eos, Transactions American Geophysical Union, 2002
Weather radar has been used by meteorologists throughout the world since the 1940s as a valuable remote sensing technology. A significant milestone was reached in the late 1980s when the first of a network of 158 Weather Surveillance Radar‐1988 Doppler (WSR‐88D) weather radars was installed in central Oklahoma.
openaire   +2 more sources

Observations of a frontal–trough merger over a wildfire, Queensland, Australia

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Observations are presented of the meteorology of a frontal–trough merger in subtropical Australia which impacted a wildfire. An elevated nocturnal mixed layer above approx. 2500 m with increasing moisture with height was identified as the source of instability that resulted in the formation of elevated storms along a 300‐km frontal–trough boundary ...
Hamish McGowan, Adrien Guyot, Viola Seifried, Joshua Soderholm   +3 more
wiley   +1 more source