Results 21 to 30 of about 575 (166)

VLA polarimetry of compact steep spectrum sources [PDF]

Astronomy and Astrophysics Supplement Series, 1997
We present the polarization properties at sub-arcsecond resolutions of 8 Compact Steep-spectrum Sources (CSSs) observed with the VLA A-array at 5, 8.4 and 15 GHz. We nd that the three most compact sources, two of which are unresolved and have an angular diame- ter < 100 milliarcsec are not polarized.
F. Mantovani, W. Junor, R. Fanti, L. Padrielli, D. J. Saikia   +4 more
openaire   +1 more source

Compact polarimetry assessment for rice and wetland mapping [PDF]

International Journal of Remote Sensing, 2012
Polarimetric RADARSAT-2 data of rice and wetlands are used to simulate compact polarimetry CP mode data from the upcoming RADARSAT Constellation Mission RCM. The simulated CP data are then used to evaluate the information content for rice and wetland mapping using supervised classification, and the results are compared for linear and circular ...
Brian Brisco, Kun Li, Bill Tedford, Francois Charbonneau, Shao Yun, Kevin Murnaghan   +5 more
openaire   +1 more source

Region-Based Sea Ice Mapping Using Compact Polarimetric Synthetic Aperture Radar Imagery with Learned Features and Contextual Information

Remote Sensing, 2023
Operational sea ice maps are usually generated manually using dual-polarization (DP) synthetic aperture radar (SAR) satellite imagery, but there is strong interest in automating this process.
Saeid Taleghanidoozdoozan, Linlin Xu, David A. Clausi   +2 more
doaj   +1 more source

Assessment of the High Resolution SAR Mode of the RADARSAT Constellation Mission for First Year Ice and Multiyear Ice Characterization

Remote Sensing, 2018
Simulated compact polarimetry from the RADARSAT Constellation Mission (RCM) is evaluated for sea ice classification. Compared to previous studies that evaluated the potential of RCM for sea ice classification, this study focuses on the High Resolution ...
Mohammed Dabboor, Benoit Montpetit, Stephen Howell   +2 more
doaj   +1 more source

An Assessment of Simulated Compact Polarimetric SAR Data for Wetland Classification Using Random Forest Algorithm

Canadian Journal of Remote Sensing, 2017
Synthetic aperture radar (SAR) compact polarimetry (CP) systems are of great interest for large area monitoring because of their ability to acquire data in a wider swath compared to full polarimetry (FP) systems and a significant improvement in ...
Masoud Mahdianpari, Bahram Salehi, Fariba Mohammadimanesh, Brian Brisco   +3 more
doaj   +1 more source

A Changing-Look AGN to Be Probed by X-ray Polarimetry

Galaxies, 2018
Active galactic nuclei (AGN) produce the highest intrinsic luminosities in the Universe from within a compact region. The central engine is thought to be powered by accretion onto a supermassive black hole.
Beatriz Agís-González, Damien Hutsemékers, Giovanni Miniutti   +2 more
doaj   +1 more source

Analysis of Dual- and Full-Circular Polarimetric SAR Modes for Rice Phenology Monitoring: An Experimental Investigation through Ground-Based Measurements

Applied Sciences, 2017
Circularly polarized synthetic aperture radar (CP-SAR) is known to be insensitive to polarization mismatch losses caused by the Faraday rotation effect and antenna misalignment.
Yuta Izumi, Sevket Demirci, Mohd Zafri bin Baharuddin, Tomoro Watanabe, Josaphat Tetuko Sri Sumantyo   +4 more
doaj   +1 more source

Moving to the RADARSAT Constellation Mission: Comparing Synthesized Compact Polarimetry and Dual Polarimetry Data with Fully Polarimetric RADARSAT-2 Data for Image Classification of Peatlands

Remote Sensing, 2017
For this research, the Random Forest (RF) classifier was used to evaluate the potential of simulated RADARSAT Constellation Mission (RCM) data for mapping landcover within peatlands. Alfred Bog, a large peatland complex in Southern Ontario, was used as a
Lori White, Koreen Millard, Sarah Banks, Murray Richardson, Jon Pasher, Jason Duffe   +5 more
doaj   +1 more source

Compact polarimetry overview and applications assessment

Canadian Journal of Remote Sensing, 2010
A synthetic aperture radar (SAR) with hybrid-polarity (CL-pol) architecture transmits circular polarization and receives two orthogonal, mutually coherent linear polarizations, which is one manifestation of compact polarimetry. The resulting radar is relatively simple to implement and has unique self-calibration features and low susceptibility to noise.
F. J. Charbonneau, B. Brisco, R. K. Raney, H. McNairn, C. Liu, P. W. Vachon, J. Shang, R. DeAbreu, C. Champagne, A. Merzouki, T. Geldsetzer   +10 more
openaire   +1 more source

The Growth of Interest in Astronomical X-Ray Polarimetry

Galaxies, 2018
Astronomical X-ray polarimetry was first explored in the end of the 1960s by pioneering rocket instruments. The craze arising from the first discoveries of stellar and supernova remnant X-ray polarization led to the addition of X-ray polarimeters to ...
Frédéric Marin
doaj   +1 more source