Results 51 to 60 of about 238,197 (181)
Coastal high-frequency radars in the Mediterranean
, 2022 Due to the semi-enclosed nature of the Mediterranean Sea, natural disasters and anthropogenic activities impose stronger pressures on its coastal ecosystems than in any other sea of the world. With the aim of responding adequately to science priorities and societal challenges, littoral waters must be effectively monitored with high-frequency radar (HFR)
Lorente, Pablo +10 more
openaire +3 more sources
VHF Boundary Layer Radar and RASS [PDF]
, 2001 This thesis describes the refinements, modifications and additions to a prototype Very High Frequency (VHF) Boundary Layer (BL) Spaced Antenna (SA) radar initially installed at the University of Adelaide's Buckland Park field site in 1997.
MacKinnon, Andrew David
core +1 more source
Miniaturisation of high‐frequency SURFACE wave radar transmitting antenna [PDF]
The Journal of Engineering, 2019 Antennas operating in the high‐frequency (HF) bands are generally relatively large in size, which severely limits the application of the antennas. Therefore, miniaturisation of the antenna is necessary. Here, a dual‐folded structure Yagi antenna is designed for HF surface wave radar (SWR).
Hong-Bo Li, Yang Song, Chang-Jun Yu
openaire +2 more sources
Comparison of reflectivity and wind profiles measured on 46.8 MHz and 430 MHz at the Arecibo Observatory [PDF]
, 1986 Comparisons of troposphere and stratosphere radar experiments at ultrahigh frequency (UHF) and very high frequency (VHF) were done at the Arecibo Observatory in April 1980 with the 430 MHz and 46.8 MHz radar.
Rottger, J.
core +1 more source
Design of a Printed Dipole Antenna Array for a Passive Radar System
International Journal of Antennas and Propagation, 2013 Passive radar (or Passive Coherent Localisation) is an advancing technology for covert operation. The signal transmitted from sources of opportunity such as radio or TV stations is used as illumination for a certain area of interest.
Peter Knott
doaj +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingThis work investigates the impact of motion estimation errors on passive inverse synthetic aperture radar (ISAR) images of rotating targets when the backprojection algorithm (BPA) is employed to focus the data.
Fabrizio Santi +3 more
doaj +1 more source
Sensors, 2020 The increasing interest in the radar detection of low-elevation and small-size targets in complicated ground environments (such as urban, suburban, and mixed country areas) calls for a precise quantification of the radar detection capabilities in those ...
Gaspare Galati +2 more
doaj +1 more source
Short-range wideband FMCW radar for millimetric displacement measurements
, 2014 International audienceThe frequency modulated continuous wave (FMCW) radar is an alternative to the pulse radar when the distance to the target is short.
Anghel, Andrei +4 more
core +3 more sources
Mapping the spatial variation of soil moisture at the large scale using GPR for pavement applications [PDF]
, 2014 The characterization of shallow soil moisture spatial variability at the large scale is a crucial issue in many research studies and fields of application ranging from agriculture and geology to civil and environmental engineering.
Benedetto, Andrea +4 more
core +2 more sources
Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature
International Journal of Antennas and Propagation, 2017 A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining ...
E. Öziş, A. V. Osipov, T. F. Eibert
doaj +1 more source