نتایج جستجو برای: polarimetry

تعداد نتایج: 4411  

2002
Wolfgang-Martin Boerner Shane R. Cloude

Recent developments of wave polarization effects in radar remote sensing are summarized in historical sequence resulting in Radar Polarimetry, Radar Interferometry and Polarimetric SAR Interferometry, which represent the current culmination in airborne and space borne ‘Microwave Remote Sensing’ technology. Whereas with radar polarimetry the textural fine-structure, target orientation, symmetrie...

Journal: :Physical review letters 2003
M J Fasolka Lori S Goldner J Hwang A M Urbas P DeRege T Swager E L Thomas

Ultrahigh molecular weight polystyrene-b-polyisoprene block copolymers (BCs), noted for their photonic behavior, were imaged using transmission near-field scanning optical microscopy (NSOM) and NSOM polarimetry. Our improved scheme for polarization modulation (PM) polarimetry, which accounts for optical anisotropies of the NSOM aperture probe, enables mapping of the local diattenuation and bire...

Journal: :Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2015

Journal: :Monthly Notices of the Royal Astronomical Society 2000

Journal: :Applied optics 2005
Donghyun Kim

The polarimetric performance nonuniformity of a wire-grid polarizer (WGP) used in imaging polarimetry is investigated with a simple numerical model. The simulation results based on rigorous coupled-wave analysis show that the aperture ratio between the entrance pupil and the WGP significantly affects the uniformity among pixels of a WGP. Even with a WGP smaller than an imaging aperture, the res...

2012

Polarimetry is the measurement and interpretation of different polarizations of electro-magnetic waves. Synthetic Aperture Radar (SAR) has been proven to be a powerful earth observation tool and emerging Polarimetric SAR (POLSAR) adds another dimension to SAR information content. Polarimetric SAR has been used in retrieval of soil moisture and surface roughness, snow and ice mapping and land-co...

1998
I. H. Stairs

We present a large sample of high-precision, coherently-dedispersed polarization profiles of millisecond pulsars at frequencies between 410MHz and 1414MHz. These data include the first polarimetric observations of several of the pulsars, and the first low-frequency polarization profiles for others. Our observations support previous suggestions that the pulse shapes and polarimetry of MSPs are m...

2010
Chen Liu Paris W. Vachon Ryan A. English Nicholas Sandirasegaram Caroline Wilcox Brian Eatock

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Journal: :Optics letters 2010
Marika A Wallenburg Michael F G Wood Nirmalya Ghosh I Alex Vitkin

Recently, we have used polarimetry as a method for assessing the linear retardance of infarcted myocardium. While linear retardance reflects tissue anisotropy, experimental geometry has a confounding effect due to dependence of the linear retardance on the orientation of the sample with respect to the probing beam. Here, polarimetry imaging of an 8mm diameter birefringent polystyrene sphere of ...

2013
Juan M. Lopez-Sanchez Fernando Vicente-Guijalba J. David Ballester-Berman Shane R. Cloude

This paper summarises the main results derived from a study developed under the ESA funded PolSAR-Ap project, aimed to demonstrate the contribution of SAR polarimetry in diverse Earth observation products. The specific application treated here is the retrieval of phenology of agricultural crops by exploiting C-band polarimetric images. Using a set of 20 images acquired by Radarsat-2 during the ...

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