Results 21 to 30 of about 5,314 (235)

Graphene-based metasurface: dynamic optical control in ultrathin flat optics. [PDF]

open access: yesNanophotonics
Abstract Graphene hosts massless Dirac fermions owing to its linear electronic band structure. This distinctive feature underpins its extraordinary electronic properties, correlating to strong light–matter interactions on an extreme subwavelength scale. Over the past decade, intensive investigations have transitioned from fundamental graphene’s optical
Baek S   +8 more
europepmc   +2 more sources

Special Issue on Polarimetric SAR Techniques and Applications

open access: yesApplied Sciences, 2017
Synthetic Aperture Radar (SAR) polarimetry is an active and fruitful field of research in Earth observation. [...]
Carlos Lopez-Martinez   +1 more
doaj   +1 more source

Advancements on Radar Polarization Information Acquisition and Processing

open access: yesLeida xuebao, 2016
The study on radar polarization information acquisition and processing has currently been one important part of radar techniques. The development of the polarization theory is simply reviewed firstly.
Dai Dahai   +3 more
doaj   +1 more source

Polarimetric Airborne Radar Sounding as an Approach to Characterizing Subglacial Röthlisberger Channels

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Conventional airborne radar sounding techniques are well suited to the detection and characterization of flat-lying, specular subglacial water bodies. However, topographically positive, diffusively scattering Röthlisberger (R-) channels are more ...
Kirk M. Scanlan   +2 more
doaj   +1 more source

CROP SPECIES RECOGNITION AND DISCRIMINATION PADDY-RICE-GROWINGFIELDS FROM REAPED-FIELDS BY THE RADAR VEGETATION INDEX (RVI) OF ALOS-2/PALSAR2 [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
The Japanese ALOS-2 satellite was launched on May 24th, 2014. It has the L-band SAR, PALSAR-2. Kim,Y. and van Zyl, J.J. proposed a kind of Radar Vegetation Index (RVI) as RVI = 8 * σ0hv / (σ0hh + σ0vv + 2* σ0hv) by L-band full-polarimetric radar data ...
Y. Yamada
doaj   +1 more source

Photometry and polarimetry of the nucleus of comet 2P/Encke [PDF]

open access: yes, 2008
Broadband imaging photometry, and broadband and narrowband linear polarimetry was measured for the nucleus of 2P/Encke over the phase-angle range 4 - 28 deg.
Bagnulo, S.   +5 more
core   +2 more sources

Interpretation of observed microwave signatures from ground dual polarization radar and space multi-frequency radiometer for the 2011 Grímsvötn volcanic eruption [PDF]

open access: yesAtmospheric Measurement Techniques, 2014
The important role played by ground-based microwave weather radars for the monitoring of volcanic ash clouds has been recently demonstrated. The potential of microwaves from satellite passive and ground-based active sensors to estimate near-source ...
M. Montopoli   +4 more
doaj   +1 more source

Albedo heterogeneity on the surface of (1943) Anteros [PDF]

open access: yes, 2009
We have investigated the effect of rotation on the polarization of scattered light for the near-Earth asteroid (1943) Anteros using the Dual Beam Imaging Polarimeter on the University of Hawaii's 2.2 m telescope.
Akimov   +23 more
core   +1 more source

On the use of the l(2)-norm for texture analysis of polarimetric SAR data [PDF]

open access: yes, 2016
In this paper, the use of the l2-norm, or Span, of the scattering vectors is suggested for texture analysis of polarimetric synthetic aperture radar (SAR) data, with the benefits that we need neither an analysis of the polarimetric channels separately ...
Deng, xinping, López Martínez, Carlos
core   +2 more sources

Estimation of Dual Polarization Weather Radar Variables

open access: yesAl-Mustansiriyah Journal of Science, 2018
Dual polarization weather radar has now become a widely used as instrument in meteorological offices around the world because of its capability in distinguishing different precipitation type and in improving the accuracy of quantitative precipitation ...
Dalia A. Mahmood
doaj   +1 more source

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