Results 31 to 40 of about 963,154 (329)

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

Numerical study on signatures of atmospheric convective cells in radar images of the ocean

open access: yes, 1999
Current and wind variations at the ocean surface can give rise to a modulation of the sea surface roughness and thus become visible in radar images. The discrimination between radar signatures of oceanic and atmospheric phenomena can be quite difficult ...
Alpers   +13 more
core   +1 more source

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

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

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

Incoherent Integration Detection Method of Airborne Phased Array Radar in a Multipath Environment

open access: yesInternational Journal of Antennas and Propagation, 2021
Airborne phased array radar (PAR) suffers from multipath problems when flying over a calm sea surface. The existence of a multipath phenomenon will cause the electromagnetic echo of the same target to be reflected back to the airborne PAR from two paths,
Yili Hu, Yongbo Zhao, Sheng Chen
doaj   +1 more source

Assessment of the performance of the Chilbolton 3-GHz Advanced Meteorological radar for cloud-top height retrieval [PDF]

open access: yes, 2005
The Chilbolton 3-GHz Advanced Meteorological Radar (CAMRa), which is mounted on a fully steerable 25 metre dish, can provide three-dimensional information on the presence of hydrometeors.
Clothiaux, E.E.   +4 more
core   +1 more source

Dual-polarization radar rainfall estimation in Korea according to raindrop shapes obtained by using a 2-D video disdrometer [PDF]

open access: yesAtmospheric Measurement Techniques, 2016
Polarimetric measurements are sensitive to the sizes, concentrations, orientations, and shapes of raindrops. Thus, rainfall rates calculated from polarimetric radar are influenced by the raindrop shapes and canting.
H.-L. Kim   +4 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

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