Results 91 to 100 of about 6,061,876 (188)
Radio Science, Volume 61, Issue 6, June 2026.Abstract The ionosphere imposes coupled amplitude, phase, and polarization distortions on trans‐ionospheric Global Navigation Satellite System (GNSS) signals, reflecting the structure and dynamics of electron‐density irregularities. Classical weak‐scatter theory provides a mature framework for interpreting amplitude and phase scintillation, but these ...
T. Durgonics, S. S. Beeck
wiley +1 more source
Polarimetry with a soft x-ray spectrometer [PDF]
SPIE Proceedings, 2008 An approach for measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics is described. A set of multilayer-coated flats reflect the dispersed X-rays to the instrument detectors. The intensity variation as a function of energy and position angle is measured to determine three Stokes parameters: I, Q, and U.
openaire +4 more sources
Characterization of Mass Wasting Events on Lunar Maria Using Mini‐RF Radar Observations
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract Evidence of mass wasting has been observed on the Moon since at least the Apollo era. Surface features indicative of mass wasting processes are traditionally characterized geomorphologically using visible images. In this study, we aim to better understand mass wasting features via their radar properties, which can provide insights into the ...
S. L. Pérez‐Cortés +7 more
wiley +1 more source
The Imaging X-ray Polarimetry Explorer 2.5 years later
We have, at last, an observatory dedicated to X-ray polarimetry that has been operational since December 9, 2021. The Imaging X-ray Polarimetry Explorer (IXPE) is a NASA SMEX mission, in partnership with ASI, based on three X-ray telescopes, each ...
Ng, Stephen Chi Yung
core +1 more source
The Imaging X-ray Polarimetry Explorer (IXPE) and New Directions for the Future
InstrumentsAn observatory dedicated to X-ray polarimetry has been operational since 9 December 2021. The Imaging X-ray Polarimetry Explorer (IXPE), a collaboration between NASA and ASI, features three X-ray telescopes equipped with detectors sensitive to linear ...
Paolo Soffitta
doaj +1 more source
Design and Tests of the Hard X-ray Polarimeter X-Calibur
Acta Polytechnica CTU Proceedings, 2014 X-ray polarimetry promises to give qualitatively new information bout high-energy astrophysical sources, such as binary black hole systems, micro-quasars, active galactic nuclei, and gamma-ray bursts.
M. Beilicke +15 more
doaj +1 more source
Enhanced colour encoding of materials discrimination information for multiple view dual-energy x-ray imaging [PDF]
, 2009 This thesis reports an investigation into dual-energy X-ray discrimination techniques. These techniques are designed to provide colour-coded materials discrimination information in a sequence of perspective images exhibiting sequential parallax.
Wang, X
core
Considerations on Possible Directions for a Wide Band Polarimetry X-ray Mission
GalaxiesThe Imaging X-ray Polarimetry Explorer (IXPE) has confirmed that X-ray polarimetry is a valuable tool in astronomy, providing critical insights into the emission processes and the geometry of compact objects.
Paolo Soffitta +32 more
doaj +1 more source
In-flight Performance of the IXPE Telescopes
The Astronomical JournalWe present a comprehensive characterization of the on-orbit imaging performance of the three telescopes on board the Imaging X-ray Polarimetry Explorer (IXPE).
Riccardo Ferrazzoli +17 more
doaj +1 more source
The IXPE View of Neutron Star Low-Mass X-ray Binaries
GalaxiesLow-mass X-ray binaries hosting weakly magnetized neutron stars (NS-LMXBs) are among the brightest sources in the X-ray sky. Since 2021, the Imaging X-ray Polarimetry Explorer (IXPE) has provided new measurements of the X-ray polarization of these ...
Francesco Ursini +11 more
doaj +1 more source