Results 71 to 80 of about 7,002 (201)

Micro-Doppler Feature Extraction of Inverse Synthetic Aperture Imaging Laser Radar Using Singular-Spectrum Analysis

Sensors, 2018
Different from microwave radar, laser radar could be more sensitive to the micro-Doppler (m-D) effect due to its wave length. This limits the application of conventional methods, such as time–frequency based approach, since the processing needs a ...
Mingzhe Zhu, Xianda Zhou, Bo Zang, Baisheng Yang, Mengdao Xing   +4 more
doaj   +1 more source

Human Micro-Doppler Frequency Estimation Approach for Doppler Radar

IEEE Access, 2018
Micro-Doppler frequency estimation is an important issue for radar target recognition. In this paper, a novel approach is proposed to accurately estimate the micro-Doppler frequencies of specific target scattering parts, which can be very promising in real-time human sensing applications.
Yipeng Ding, Chengxi Lei, Xuemei Xu, Kehui Sun, Ling Wang   +4 more
openaire   +2 more sources

Postfrontal Deep Convection Over the Southern Ocean and Orographic Precipitation Enhancement Over Tasmania

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract The orographic precipitation enhancement (OPE) generated within wintertime post‐frontal air masses is a prominent climate feature of Tasmania. This study investigates a passage of a cold sector of a mid‐latitude cyclone over the Southern Ocean (SO) and Western Tasmania (WTAS) observed from 2100 UTC 11 July to 0300 UTC 13 July.
Artur Gevorgyan, Steven Siems, Yi Huang, Luis Ackermann, T. Alinejadtabrizi   +4 more
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, Mikhail Kanevsky, Vladimir Karaev   +2 more
doaj  

A Multi-Source Radar Data Complementary Enhancement Generation Method Based on Diffusion Model

Remote Sensing
Multi-source radar data fusion has become increasingly vital for advancing weather monitoring and forecasting. However, effectively integrating Doppler radar with an X-band phased-array radar remains challenging.
Yuan Peng, Xiongbo Zheng, Zhilong Shang, Kaiqi He, Zhiyong Cheng   +4 more
doaj   +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
doaj   +1 more source

To Align or Not to Align? That Is the Question

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Previous studies have shown that vertically misaligned circulations are commonly found in weaker tropical cyclones (TCs) below hurricane strength, whereas TCs of hurricane intensity more typically exhibit vertically aligned vortices. Thus an important step in the TC intensification process is achieving a vertically aligned circulation.
Michael S. Fischer, George R. Alvey, Deelan Jariwala, Paul D. Reasor   +3 more
wiley   +1 more source

Linking Interregional NASA Airborne Observations of Near‐Storm Environments to Tropical Oceanic Convective Structure

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Deep tropical oceanic convection is a key component of the tropical atmosphere, with environmental moisture and vertical wind shear influencing its structure and intensity. However, attempts to generalize convection‐environment relationships across the broad‐scale tropics have produced inconsistent results, partly owing to limits of reanalysis,
Benjamin D. Rodenkirch, Angela K. Rowe
wiley   +1 more source

Interannual Variability of Mean Winds and the Semidiurnal Tide in the Antarctic Summer Mesosphere‐Lower Thermosphere

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Long‐term observations at southern polar latitudes in the summertime mesosphere–lower thermosphere (MLT) reveal persistent nonmigrating semidiurnal tides, with the zonal wavenumber‐1 (s $s$ = 1) component being particularly dominant. Using nearly two decades of meteor radar wind measurements (80–100 km) from Davis Station (East Antarctica) and
R. A. Vincent, J.‐H. Kim, C. Lee, G. Jee, D. J. Murphy, I. M. Reid   +5 more
wiley   +1 more source

Contribution of Aloft Gravitational Sorting and Lower‐Part Coalescence to Precipitation Over the Southeastern Tibetan Plateau

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Observational constraints on the vertical microphysical evolution of mixed‐phase precipitation across the melting layer over the high‐altitude of southeastern Tibetan Plateau remain scarce. Using collocated two‐dimensional video disdrometer and Micro Rain Radar measurements in rainy seasons of 2022–2025, we characterize the vertical ...
Xin Xu, Xuelong Chen, Lulin Xue, Yaoming Ma   +3 more
wiley   +1 more source