Results 91 to 100 of about 707,332 (306)
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
, 2017 This study presents the use of micro-Doppler signatures collected by a multistatic radar to detect and discriminate between micro-drones hovering and flying while carrying different payloads, which may be an indication of unusual or potentially hostile ...
M. Ritchie +3 more
semanticscholar +1 more source
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 +6 more
wiley +1 more source
Passive Radar for Opportunistic Monitoring in E-Health Applications
IEEE Journal of Translational Engineering in Health and Medicine, 2018 This paper proposes a passive Doppler radar as a non-contact sensing method to capture human body movements, recognize respiration, and physical activities in e-Health applications.
Wenda Li, Bo Tan, Robert Piechocki
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History of Doppler Radar Navigation
Navigation, 1993 This paper traces the history of the development and applications of Doppler radar navigation systems from their inception in the mid-1940s to the present. The early design concepts, problems, tribulations, and obstacles are discussed. With only noncoherent pulse radar transmitters available at that time, a unique technique of self-coherence had to be ...
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Ultrasound fundamentals and their clinical implications for interventional cytopathologists
Cytopathology, EarlyView.Interventional cytopathologists need to know about ultrasound physics and instrumentation to produce an image that faithfully recreates the lesion discovered by the sonographer and diagnosed by the radiologist. A deep quantitative understanding of physics is not required.
David Lieu
wiley +1 more source
The Effect of Sea Surface Slicks on the Doppler Spectrum Width of a Backscattered Microwave Signal
Sensors, 2008 The influence of a surface-active substance (SAS) film on the Doppler spectrum width at small incidence angles is theoretically investigated for the first time for microwave radars with narrow-beam and knife-beam antenna patterns.
Eugeny Meshkov +2 more
doaj
Hand Gesture Recognition Using Micro-Doppler Signatures With Convolutional Neural Network
IEEE Access, 2016 In this paper, we investigate the feasibility of recognizing human hand gestures using micro-Doppler signatures measured by Doppler radar with a deep convolutional neural network (DCNN).
Youngwook Kim, Brian Toomajian
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Machine Learning Detection of Melting Layers From Radar Observations
Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 2, June 2025.Abstract Melting layers in the atmosphere signify where falling ice hydrometeors melt into raindrops, and can be identified by discernible radar signatures. Accurate detection of melting layers is crucial to improving quantitative precipitation estimation, weather forecasts, microwave communication, and aviation risk assessments in a changing climate ...
Yan Xie +3 more
wiley +1 more source
Journal of Flood Risk Management, Volume 18, Issue 2, June 2025.ABSTRACT This study aimed to develop a proof‐of‐concept prototype of a machine learning system to forecast and mitigate the effect of floods in Kasese District. The researchers used a participatory design science approach. The researchers conducted document reviews and brainstorming to obtain past climate data from the representatives of affected ...
Edward Miiro +4 more
wiley +1 more source