Results 91 to 100 of about 1,103 (194)

The growth of interest for astronomical X-ray polarimetry

, 2018
Astronomical X-ray polarimetry was first explored in the end of the 60's by pioneering rocket instruments. The craze arising from the first discoveries on stellar and supernova remnant X-ray polarization led to the addition of X-ray polarimeters on-board
Frédéric Marin
core   +1 more source

Pyramid Fine and Coarse Attentions for Land Cover Classification from Compact Polarimetric SAR Imagery

Remote Sensing
Land cover classification from compact polarimetry (CP) imagery captured by the launched RADARSAT Constellation Mission (RCM) is important but challenging due to class signature ambiguity issues and speckle noise.
Saeid Taleghanidoozdoozan, Linlin Xu, David A. Clausi   +2 more
doaj   +1 more source

An evaluation of PolSAR speckle filters on compact-pol images

, 2012
The goal of this study is to evaluate some polarimetric speckle filters when applied to Compact Polarimetry (CP) data. Seven filters are evaluated on a set of artificial CP images. Performances regarding image restoration and polarimetric information
Gagnon, Langis, López Martínez, Carlos, Charbonneau, François, Tom Landry, Samuel Foucher, Carlos Lopez-Martinez, Foucher, Samuel, Landry, Tom, Francois Charbonneau, Langis Gagnon   +9 more
core   +1 more source

Compact circular polarization detector with Z-shaped thermoelectric nanoantenna for infrared (IR) polarimetry

Materials Today Advances
The capability of infrared (IR) polarimetric imaging to enhance object detection by capturing the polarization states of emitted waves has been significantly advanced, particularly in remote sensing and biomedical imaging.
Yudhistira Yudhistira, Sangjo Choi
doaj   +1 more source

A Compact Polarimetric CTLR Mode Calibration Method Immune to Faraday Rotation Using Two Dihedral Reflectors

Remote Sensing
This paper proposes a compact polarimetric CTLR mode calibration method using only two dihedral reflectors. The method leverages the property that the dihedral scattering matrix is unaffected by double-pass Faraday rotation, effectively eliminating the ...
Siqi Liu, Jili Sun, Xiuqing Liu
doaj   +1 more source

Compact and Full Polarimetric SAR Imaging for Target Characterization

, 2020
Recent interest in dual polarization Synthetic Aperture Radar (SAR) systems, in which a single polarization is transmitted (e.g. linear horizontal or right circular), followed by reception of two orthogonal polarization, has lead to a novel approach to ...
Daamouche, Abdelhamid, Siham Mebrek, Boularbah Souissi, Abdelhamid Daamouche, Bouzerar, H., Hafidha Bouzerar, Mebrek, S., Souissi, B.   +7 more
core   +1 more source

Gemini mid-IR polarimetry of NGC 1068: Polarized structures around the nucleus

, 2007
We present diffraction-limited, 10 μm imaging polarimetry data for the central regions of the archetypal Seyfert active galactic nucleus NGC 1068. The position angle of polarization is consistent with three dominant polarizing mechanisms.
Mason, Rachel E, Radomski, James T, Elitzur, Moshe, Mason, R, Roche, Patrick, Packham, C, Mason, R., Hough, James H, Perlman, Eric S, Fisher, Scott E, Volk, K, Radomski, J., Young, Stuart, Volk, Kevin M, Fisher, S., Fisher, S, Roche, Patrick F, Perlman, E, Young, S, Hough, JH, Packham, Christopher C, Perlman, E., Radomski, J, Volk, K., Hough, J. H., Roche, P. F., Elitzur, M, Packham, C., Young, S., Roche, PF   +29 more
core   +1 more source

Dichroic Filters For Astronomical X-Ray Polarimetry

, 2006
We describe a programme of research to investigate materials which exhibit linear dichroism at X-ray wavelengths, and to assess their potential as astronomical X-ray polarimeters.
Solan, G., Fraser, G. W., Collins, S. P., Monks, P. S., Bannister, N. P., Harris, Kenneth David Maclean, Martindale, A.   +6 more
core   +1 more source

X-Ray Polarimetry in the Low-statistics Regime Using the Bayesian Approach Reveals Polarization Angle Variations

The Astrophysical Journal
X-ray polarimetry of the accreting compact object has revealed fast time variations in the polarization angle (PA), suggesting that the geometry and/or optical depth of the Comptonization region is changing rapidly.
Hong Li, Qing-Chang Zhao, Hua Feng, Lian Tao, Sergey S. Tsygankov   +4 more
doaj   +1 more source

Spin Tetrad Formalism of Circular Polarization States in Relativistic Jets

Universe
Relativistic jets from active galactic nuclei (AGN) have been a topic of peak interest in the high-energy astrophysics community for their uniquely dynamic nature and incredible radiative power emanating from supermassive black holes and similarly ...
Ronald Gamble
doaj   +1 more source