Results 31 to 40 of about 789,916 (296)

MST radar and polarization lidar observations of tropical cirrus [PDF]

open access: yesAnnales Geophysicae, 2001
Significant gaps in our understanding of global cirrus effects on the climate system involve the role of frequently occurring tropical cirrus. Much of the cirrus in the atmosphere is largely due to frequent cumulus and convective activity in the ...
Y. Bhavani Kumar   +3 more
doaj   +1 more source

Terrain analysis using radar shape-from-shading [PDF]

open access: yes, 2003
This paper develops a maximum a posteriori (MAP) probability estimation framework for shape-from-shading (SFS) from synthetic aperture radar (SAR) images.
Bors, A G, Hancock, E R, Wilson, R C
core   +3 more sources

RADAR Observations [PDF]

open access: yesHighlights of Astronomy, 1998
Radar techniques can be a powerful adjunct for studying meteor storms in general because of their sensitivity, capacity for continuous observations and their use of current techniques facilitating the handling of data. While some radars are limited to only a range-time presentation (and so adequate for a time-profile description of a storm event), some
openaire   +1 more source

MIMO radar space–time adaptive processing using prolate spheroidal wave functions [PDF]

open access: yes, 2008
In the traditional transmitting beamforming radar system, the transmitting antennas send coherent waveforms which form a highly focused beam. In the multiple-input multiple-output (MIMO) radar system, the transmitter sends noncoherent (possibly ...
Chun-yang Chen   +2 more
core   +2 more sources

Radar-to-Radar Interference Suppression for Distributed Radar Sensor Networks [PDF]

open access: yesRemote Sensing, 2014
Radar sensor networks, including bi- and multi-static radars, provide several operational advantages, like reduced vulnerability, good system flexibility and an increased radar cross-section. However, radar-to-radar interference suppression is a major problem in distributed radar sensor networks.
Wen-Qin Wang, Huaizong Shao
openaire   +2 more sources

A Corpus Study of Dyslexic University Students’ L2 Writing Processes

open access: yesLidil
Second/foreign language (L2) writing is a critical skill for university students, and one that has attracted a great deal of attention in the literature on academic writing.
Laurie Radar, Gaëtanelle Gilquin
doaj   +1 more source

A Multiple Radar Approach for Automatic Target Recognition of Aircraft using Inverse Synthetic Aperture Radar [PDF]

open access: yes, 2018
Along with the improvement of radar technologies, Automatic Target Recognition (ATR) using Synthetic Aperture Radar (SAR) and Inverse SAR (ISAR) has come to be an active research area.
Cantu, Angel   +8 more
core   +3 more sources

Aircraft Target Classification Based on Correlation Features from Time-domain Echoes

open access: yesLeida xuebao, 2015
This paper reports the classification of helicopters, propeller-driven aircraft, and turbojet based on differences in their time-domain modulation periods using a conventional radar system.
Du Lan   +4 more
doaj   +1 more source

Chaff identification method based on Range‐Doppler imaging feature

open access: yesIET Radar, Sonar & Navigation, 2022
Chaff is widely used in electronic countermeasures as an effective passive jamming method. This study proposes a chaff identification method that integrates the distribution of distance, Doppler frequency, and power in Range‐Doppler imaging.
Husheng Wang   +8 more
doaj   +1 more source

Super-Resolving Quantum Radar: Coherent-State Sources with Homodyne Detection Suffice to Beat the Diffraction Limit [PDF]

open access: yes, 2013
There has been much recent interest in quantum metrology for applications to sub-Raleigh ranging and remote sensing such as in quantum radar. For quantum radar, atmospheric absorption and diffraction rapidly degrades any actively transmitted quantum ...
Dowling, Jonathan P.   +3 more
core   +4 more sources

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