Results 51 to 60 of about 2,419 (211)

Air-borne linear frequency modulation range interrupted continuous-wave SAR for high-resolution imaging

open access: yesThe Journal of Engineering, 2019
To avoid two apertures adopted in air-borne continuous-wave (CW) synthetic aperture radar (SAR) systems, the novel air-borne linear frequency modulation range interrupted continuous wave (LFMRICW) SAR imaging mode is presented here.
Wei Xu   +5 more
doaj   +1 more source

An Extraordinary Dayside Negative Ionospheric Storm of 11 May 2024 and Total Electron Content (TEC) Vortices

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract On 10–11 May 2024, a major geomagnetic storm occurred on Earth. It significantly affected the dynamics of the Earth's atmosphere and ionosphere. Here we report the occurrence of a severe dayside negative ionospheric storm in the American/Atlantic region during the recovery phase of the 10–11 May 2024 superstorm.
E. Astafyeva   +8 more
wiley   +1 more source

Akuisisi Data Sederhana untuk Radar FM-CW

open access: yes, 2012
This paper describes the development of a simple data acquisition modul for FM-CW radar. The modul is design to be integrated in a through wall radar system using UWB and FM-CW technologies for life detector application.
Purwoko, Adhi
core   +2 more sources

Low power millimeter wave radar system for the visually impaired

open access: yesThe Journal of Engineering, 2019
In order to help visually impaired people to avoid obstacles, a K-band millimetre wave (MMW) radar system based on the principle of frequency-modulated continuous wave (FMCW) is proposed in this study.
Ningbo Long   +4 more
doaj   +1 more source

Multiple‐Event Study of Substorm Electric Field Penetration Into Middle Latitudes Based on Simultaneous Observation of 630‐nm Airglow Enhancements at Three Stations

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract It is known that convection electric fields develop in the polar region associated with substorm onset, and a westward electric field penetrates to lower latitudes on the night side. Two‐dimensional observations of 630‐nm airglow enhancements associated with the westward electric field can be conducted using all‐sky cameras at middle latitudes.
S. Morita   +10 more
wiley   +1 more source

Multiple-target CW FM radar [PDF]

open access: yes, 1972
Development of a multiple-target CW FM radar is described. This type of radar has advantages over pulse radars particularly in portable, battery operated applications.NAhttp://archive.org/details ...
Hoisington, D. B. (David B.)
core  

Synthetic aperture FM-CW radar applied to the detection of objects buried in snowpack [PDF]

open access: yes, 1994
Presents the principle of synthetic aperture frequency modulated continuous wave (FM-CW) radar and demonstrates the detection results of several objects buried in natural snowpack using the radar system.
Abe, T.   +11 more
core   +1 more source

Cascaded Kalman filter for target tracking in automotive radar

open access: yesThe Journal of Engineering, 2019
In automotive anti-collision radar system, the accuracy of velocity is one of the key indicators to measure radar performance. For frequency modulation continuous wave radar with chirp sequence, which is commonly used in automotive radar, there are two ...
Yang Li   +4 more
doaj   +1 more source

Proposal of multiple access FMCW radar for inter-radar interference avoidance

open access: yesThe Journal of Engineering, 2019
Inter-radar interference will be a crucial problem when a number of frequency modulated continuous wave (FMCW) radars are densely deployed in future, since it can cause miss detection and false detection of the target due to wideband interference and ...
Mikihiro Kurosawa   +5 more
doaj   +1 more source

Strong Fault Interaction in Double‐Vergence Structure: Lessons From the 2022 Yuli Earthquake and the 2022 Chihshang Earthquake, Eastern Taiwan

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract The Longitudinal Valley Fault (LVF) and the Central Range Fault (CRF) in eastern Taiwan consist of a head‐to‐head double‐vergence structure hosting disastrous earthquakes. It was previously proposed that the fault slip on one of these faults suppresses the earthquake generation on the other.
Yuri Ishimaru   +3 more
wiley   +1 more source

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