Results 111 to 120 of about 707,332 (306)
ESA's Aeolus Mission Reveals Uncertainties in Tropical Wind and Wave‐Driven Circulations
Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.Abstract The recent European Space Agency Aeolus mission provided global coverage of horizontal line‐of‐sight (HLOS) wind profiles. Using observing system experiments with HLOS winds in the ECMWF data assimilation system, we quantify the effects of HLOS winds on wave circulation and the mean zonal state in the tropical upper troposphere and lower ...
N. Žagar +5 more
wiley +1 more source
Design of Dual-Mode Local Oscillators Using CMOS Technology for Motion Detection Sensors
Sensors, 2018 Recently, studies have been actively carried out to implement motion detecting sensors by applying radar techniques. Doppler radar or frequency-modulated continuous wave (FMCW) radar are mainly used, but each type has drawbacks.
Keum-Won Ha +3 more
doaj +1 more source
Synthesis of Through-Wall Micro-Doppler Signatures of Human Motions Using Generative Adversarial Networks [PDF]
arXivNarrowband radar micro-Doppler signatures are heavily used to identify and classify human activities. When the radar is operated in through-wall environments, the complex electromagnetic propagation phenomenology introduces considerable distortions in the micro-Doppler signatures through attenuation and multipath.
arxiv
Super-resolution radar imaging via convex optimization [PDF]
arXiv, 2018 A radar system emits probing signals and records the reflections. Estimating the relative angles, delays, and Doppler shifts from the received signals allows to determine the locations and velocities of objects. However, due to practical constraints, the probing signals have finite bandwidth B, the received signals are observed over a finite time ...
arxiv
Doppler Radar Observations of a Hailstorm [PDF]
Journal of Applied Meteorology, 1975 Abstract A severe hailstorm, occuring on 10 August 1966, passed over a zenith pointing, X-band, pulsed-Doppler radar located on a mountain in southeastern Arizona. An analysis was made of measurements of radar reflectivity, mean Doppler velocity, variance of the Doppler spectrum, and calculated updraft velocity.
openaire +2 more sources
BASTA: A 95-GHz FMCW Doppler Radar for Cloud and Fog Studies
, 2016 Doppler cloud radars are amazing tools to characterize cloud and fog properties and to improve their representation in models. However commercially-available cloud radars (35 and 95 GHz) are still very expensive, which hinders their widespread deployment.
J. Delanoë +10 more
semanticscholar +1 more source
Wind Shear and Reflectivity Gradient Effects on Doppler Radar Spectra [PDF]
, 1968 Peter W. Sloss, David Atlas
openalex +1 more source
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract The National Aeronautics and Space Administration (NASA) Atmospheric Waves Experiment (AWE) instrument, launched in November 2023, provides direct observation of small‐scale (30–300 km) gravity waves (GWs) in the mesosphere on a global scale.
Jiarong Zhang +5 more
wiley +1 more source
The Determination of Kinematic Properties of a Wind Field Using Doppler Radar [PDF]
, 1968 K. A. Browning, Raymond Wexler
openalex +1 more source
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract During the March equinox of 2023, a strong easterly wind of ∼80 m s−1 appeared at an altitude of ∼82 km in the equatorial upper mesosphere, which is regarded as an enhancement of the mesopause semi‐annual oscillation. In this study, a new reanalysis data available up to 110 km was used to investigate its momentum budget.
Kaoru Sato +9 more
wiley +1 more source