Results 21 to 30 of about 19,915 (242)

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

open access: yes, 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   +2 more
core   +1 more source

Monitoring and Analysis of Respiratory Patterns Using Microwave Doppler Radar

open access: yesIEEE Journal of Translational Engineering in Health and Medicine, 2014
Noncontact detection characteristic of Doppler radar provides an unobtrusive means of respiration detection and monitoring. This avoids additional preparations, such as physical sensor attachment or special clothing, which can be useful for certain ...
Yee Siong Lee   +3 more
doaj   +1 more source

Foot Gesture Recognition Using High-Compression Radar Signature Image and Deep Learning

open access: yesSensors, 2021
Recently, Doppler radar-based foot gesture recognition has attracted attention as a hands-free tool. Doppler radar-based recognition for various foot gestures is still very challenging. So far, no studies have yet dealt deeply with recognition of various
Seungeon Song   +3 more
doaj   +1 more source

Doppler radar calibration system

open access: yesIEEE Aerospace and Electronic Systems Magazine, 2012
The developed prototype has proved to be a useful instrument for the calibration of Doppler/range radars. The system includes innovative solutions for the generation of Doppler and distances with high precision. It is able to generate accurate Doppler shifts with a resolution higher than 4·10 -3 Hz and speeds with an accuracy of around ±2.76 ppm - from
Fernández Fernández, Jean Raphael Olivier   +5 more
openaire   +3 more sources

The radar signature of the Wind Lens: a less disruptive wind turbine? [PDF]

open access: yes, 2012
We study the radar signature of a new type of wind turbine, named the Wind Lens. This design includes a flanged shroud around the turbine which concentrates the wind flow past the turbine blades and hence improves the efficiency.
H. Griffiths   +9 more
core   +1 more source

Challenges with Regard to Unmanned Aerial Systems (UASs) Measurement of River Surface Velocity Using Doppler Radar

open access: yesRemote Sensing, 2022
Surface velocity is traditionally measured with in situ techniques such as velocity probes (in shallow rivers) or Acoustic Doppler Current Profilers (in deeper water). In the last years, researchers have developed remote sensing techniques, both optical (
Filippo Bandini   +5 more
doaj   +1 more source

VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]

open access: yes, 2002
The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E.   +5 more
core   +1 more source

Noise radar range doppler imaging via 2D generalized smoothed‐l0

open access: yesElectronics Letters, 2021
This paper presents an algorithm to enhance the range‐Doppler imaging performance for noise radar. Traditional matched filtering based method suffers from high range and Doppler sidelobes, which makes the weak targets overwhelmed by the sidelobes of ...
Xingyu Lu, Hong Gu, Weimin Su
doaj   +1 more source

An Adaptive Filtering Algorithm Based on Range-Doppler Information Guidance

open access: yesIEEE Access, 2023
Millimetre-wave frequency-modulated continuous-wave (FMCW) radar is widely used in various scenarios. However, it is often affected by static and dynamic clutter interference, which has a negative impact on its performance.
Zhuo Li, Jun Zhang, Biyuan Li, Jiazhi Yu
doaj   +1 more source

Doppler spectra from DWD's operational C-band radar birdbath scan: sampling strategy, spectral postprocessing, and multimodal analysis for the retrieval of precipitation processes [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
This study explores the potential of using Doppler (power) spectra from vertically pointing C-band radar birdbath scans to investigate precipitating clouds above the radar. First, the new birdbath scan strategy for the network of dual-polarization C-band
M. Gergely   +3 more
doaj   +1 more source

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