Results 81 to 90 of about 9,565 (256)
Modeling Regional Electric Field Using EISCAT3D Observations
Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.Abstract EISCAT3D, which is in its final stage of construction, will be the next generation incoherent scatter radar (ISR) system to provide the full ion velocity vector across hundreds of kms in vertical and horizontal directions. This presents a tremendous opportunity to study the three‐dimensional nature of ionospheric electrodynamics.
Habtamu W. Tesfaw +5 more
wiley +1 more source
地球与行星物理论评All-sky meteor radars have become a reliable and widely used tool for observing horizontal winds in the mesosphere and lower thermosphere (MLT) region. This provides vital data support for the study of dynamics in this region.
Maolin Lu +5 more
doaj +1 more source
Low Complexity Algorithm for Range-Point Migration-Based Human Body Imaging for Multistatic UWB Radars [PDF]
, 2019 High-resolution, short-range sensors that can be applied in optically challenging environments (e.g., in the presence of clouds, fog, and/or dark smog) are in high demand for various applications.
Shouhei Kidera, Yoshiki Akiyama
core +2 more sources
Systems Engineering, Volume 28, Issue 4, Page 471-497, July 2025.ABSTRACT Australia is a maritime nation, relying on access to its surrounding oceans for its economy and security. The Royal Australian Navy conducts undersea surveillance to monitor this vital maritime environment and gain insight into activities beneath the ocean's surface.
Timothy J. Milledge +2 more
wiley +1 more source
Accurate Phase Calibration of Multistatic Imaging System for Medical and Industrial Applications
Applied SciencesMultistatic imaging systems are commonly used in radar systems and microwave imaging. In these systems, many antennas are arranged three-dimensionally and connected to RF switches.
Hiroshi Tabata +2 more
doaj +1 more source
Sensors, 2017 In this study, the modified Cramér-Rao lower bounds (MCRLBs) on the joint estimation of target position and velocity is investigated for a universal mobile telecommunication system (UMTS)-based passive multistatic radar system with antenna arrays. First,
Chenguang Shi +3 more
doaj +1 more source
Two‐Day Wave Modulation of Gravity Wave Momentum Fluxes Observed Over South America
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 8, 28 April 2025.Abstract Planetary wave (PW) modulation of gravity wave (GW) dissipation has long been proposed as a source of longitudinal variability in the mesosphere and lower thermosphere. However, direct measurements of GW drag are rare. We identify 2‐day wave variations in GW momentum fluxes measured by the Southern Argentina Agile Meteor Radar (SAAMER) in Rio ...
Ruth S. Lieberman +5 more
wiley +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 Ground-penetrating radar (GPR) technology for underground exploration consists of the transmission of an electromagnetic signal in the ground for sensing the presence of buried objects.
Michele Ambrosanio +3 more
doaj +1 more source
System Concepts for Bi- and Multi-Static SAR Missions [PDF]
, 2003 The performance and capabilities of bi- and multistatic spaceborne synthetic aperture radar (SAR) are analyzed. Such systems can be optimized for a broad range of applications like frequent monitoring, wide swath imaging, single-pass cross-track ...
Fiedler, Hauke +4 more
core
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