Results 71 to 80 of about 7,886 (195)

Radio Astronomical Polarimetry and Point-Source Calibration

, 2004
A mathematical framework is presented for use in the experimental determination of the polarimetric response of observatory instrumentation. Elementary principles of linear algebra are applied to model the full matrix description of the polarization ...
Hamaker J. P., McKinnon M. M., Roberts J. A., Turlo Z., W. van Straten, Xilouris K. M.   +5 more
core   +2 more sources

Polarization‐sensitive diffractive optics and metasurfaces: “Past is Prologue”

Nanophotonics, Volume 14, Issue 23, Page 3825-3834, 02 November 2025.
Abstract Polarization control and switchability are among the most unique features of “metasurfaces” as compared with diffractive optics technologies of the past. Here, we review how the polarization control afforded by the advent of present‐day metasurfaces compares to diffractive elements of previous decades, clarifying from a functional perspective ...
Noah A. Rubin, Yeshaiahu Fainman
wiley   +1 more source

Evaluation of Polarimetric SAR Decomposition for Classifying Wetland Vegetation Types [PDF]

Remote Sensing, 2015
The Florida Everglades is the largest subtropical wetland system in the United States and, as with subtropical and tropical wetlands elsewhere, has been threatened by severe environmental stresses. It is very important to monitor such wetlands to inform management on the status of these fragile ecosystems.
Hong, Sang-Hoon, Kim, Hyun-Ok, Wdowinski, Shimon, Feliciano, Emanuelle   +3 more
openaire   +3 more sources

Application of metasurface in future displays

Nanophotonics, Volume 14, Issue 22, Page 3527-3555, 01 November 2025.
Abstract Optical metasurfaces, as a booming research field, have provided new methods for modulating the amplitude, phase, and polarization of light through artificial birefringent structures or structural resonances. It has been used to design planar optical components such as ultra‐thin lenses, ultra‐wideband achromatic lenses, and orbital angular ...
Lingyu Ai, Zhi Gan, Christoph Vannahme, Xiaolong Zhu   +3 more
wiley   +1 more source

Improvement of PolSAR Decomposition Scattering Powers Using a Relative Decorrelation Measure

, 2017
In this letter, a methodology is proposed to improve the scattering powers obtained from model-based decomposition using Polarimetric Synthetic Aperture Radar (PolSAR) data.
Bhattacharya, A., Ratha, D., Surendar, M.   +2 more
core   +1 more source

Spatio‐Temporal Variation in Aerial Arthropod Abundance Revealed by Weather Radars

Global Change Biology, Volume 31, Issue 10, October 2025.
Alarming arthropod decline has been reported from around the world, but we lack conensus on the generality, severity, and potential causes of these declines. We use weather radars for large‐scale aerial arthropod monitoring across the United Kingdom and show that, on average, nocturnal arthropods showed a decline in abundance, while diurnal arthropods ...
Mansi Mungee, Maryna Lukach, Chris Shortall, James R. Bell, Elizabeth J. Duncan, Freya I. Addison, Lee E. Brown, William E. Kunin, Christopher Hassall, Ryan R. Neely III   +9 more
wiley   +1 more source

Soil moisture retrieval under wheat crop using RISAT-1 hybrid polarimetric SAR data

Journal of Agrometeorology, 2019
The study aims to retrieve soil moisture from RISAT-1 hybrid polarimetric SAR data. Although the use of linear polarimetric SAR data has been well understood and documented, but hybrid polarimetric SAR data is grossly under explored and under reported ...
P.K. SHARMA, D. KUMAR, H. S. SRIVASTAVA, P. PATEL, T. SIVASANKAR   +4 more
doaj   +1 more source

The “Analogs for VENus' GEologically Recent Surfaces” (AVENGERS) Initiative: Using Terrestrial Analogs to Study Recent Volcano‐Tectonic Activity on Venus and Inform the Characterization of Terrestrial Exoplanets

Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract Several missions to Venus have recently been selected for launch, opening a new era for the exploration of the planet. A key question these missions seek to address is whether Venus is geologically active today. Detecting active volcanism on Venus would contribute to a better understanding of volcanic and atmospheric processes on Earth.
P. D’Incecco, J. Filiberto, J. B. Garvin, G. N. Arney, S. A. Getty, E. Kohler, L. M. Zelenyi, L. V. Zasova, O. I. Korablev, M. A. Ivanov, J. W. Head, D. A. Gorinov, S. Bhattacharya, S. S. Bhiravarasu, D. Putrevu, I. López, R. Ghail, P. Mason, J. Brossier, C. Monaco, S. Branca, R. A. Corsaro, D. Trang, J. R. Crandall, N. Mari, M. Blackett, G. Komatsu, A. Kosenkova, I. Flynn, S. Aveni, N. Lang, B. J. Thomson, I. Pagano, S. Cassisi, G. Eggers, R. E. Ernst, H. El Bilali, T. Kremic, J. Lustig‐Yaeger, N. Izenberg, L. Bruzzone, M. El Yazidi, E. Ferroni, D. Coero Borga, C. Badia, S. Parisini, G. Fiasconaro, S. Cussini, M. Dolci, E. Brocato, G. Gallardo i Peres, N. Davidova, S. Kane, C. Ostberg, V. Ortega‐Ramos, G. Di Achille   +55 more
wiley   +1 more source

Spin‐Orbit Photonics with Potato Starch Lenses

Advanced Optical Materials, Volume 13, Issue 21, July 25, 2025.
Native potato starch spherulites are introduced as volumetric optical elements that modulate both dynamic and geometric phases of light. These spherulites focus light and generate optical vortices via spin‐orbit interaction, functioning as polarization‐sensitive microlenses. Their unique radial anisotropy enables applications in vortex beam generation,
Petr Bouchal, Petr Viewegh, Petr Liška, Radim Chmelík, Zdeněk Bouchal   +4 more
wiley   +1 more source

Kriging‐variance‐based multi‐member ensembles of radar–rain‐gauge precipitation estimates: Application in Switzerland

Quarterly Journal of the Royal Meteorological Society, Volume 151, Issue 770, July 2025 Part A.
We explore the variance of the radar–rain‐gauge combination kriging‐based system “CombiPrecip”, showing that it represents satisfactorily the radar–rain‐gauge precipitation uncertainty around the kriging expected value. We then present a method to generate ensembles out of it, which we find to be very similar in texture with the expected‐value image ...
I. V. Sideris, A. Ntoumos, A. Berne, M. Gabella, M. Boscacci, L. Clementi, U. Germann   +6 more
wiley   +1 more source