Results 111 to 120 of about 777,782 (300)
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
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
Radio Science, Volume 61, Issue 1, January 2026.Abstract A method of estimating heavy (O+) and light (H+ and He+) ion drift velocities in the topside F‐region ionosphere using Arecibo uncoded long pulse data is presented. We show that multi‐ion drift velocity estimation using long pulse ACF phase data requires accurate knowledge of ionospheric state parameters, such as temperatures and compositions,
Binghui Wang, Erhan Kudeki, Yulun Wu
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
doaj +1 more source
A Modified Hierarchical Vision Transformer for Soil Moisture Retrieval From CYGNSS Data
Water Resources Research, Volume 62, Issue 1, January 2026.Abstract This research introduces a new deep learning (DL) framework, multi‐head self‐attention‐aided vision Transformer (MSA‐ViT), for soil moisture (SM) retrieval using Cyclone Global Navigation Satellite System (CYGNSS) data. We first assess the sensitivity of CYGNSS reflectivity (Γ) $({\Gamma })$ to SM, demonstrating a strong physical linkage ...
Qingyun Yan +4 more
wiley +1 more source
An alternative representation of Synthetic Aperture Radar images as an aid to the interpretation of englacial observations [PDF]
The CryosphereGround-penetrating radar reveals subsurface geometry and ice stratigraphy that contains information about past and present dynamics of the cryosphere. Synthetic Aperture Radar (SAR) is a processing technique based on averaging the radar echoes received ...
Á. Arenas-Pingarrón +6 more
doaj +1 more source
Measurement of vertical velocity using clear-air Doppler radars [PDF]
A new clear air Doppler radar was constructed, called the Flatland radar, in very flat terrain near Champaign-Urbana, Illinois. The radar wavelength is 6.02 m.
Clark, W. L. +5 more
core +1 more source
Earth and Space Science, Volume 13, Issue 1, January 2026.Abstract Lidar observations of atmospheric gravity waves (GWs) have been made spanning 14 years above McMurdo Station, Antarctica. Using these extensive observations and interleaved data processing techniques which enable bias‐free/noise‐floor‐free estimation of GW parameters, this study forms seasonal baselines for GW potential energy densities (Epm ...
Jackson Jandreau, Xinzhao Chu
wiley +1 more source
El Campo solar radar system Second semiannual report, Jul. 1 - Dec. 31, 1965 [PDF]
Doppler characteristics of radar echoes reflected by solar ...
Harrington, J. V.
core +1 more source