Spectral invariance hypothesis study of polarized reflectance with Ground-based Multiangle SpectroPolarimetric Imager (GroundMSPI)

2015 ◽  
Author(s):  
Christine L. Bradley ◽  
Meredith Kupinski ◽  
David J. Diner ◽  
Feng Xu ◽  
Russell A. Chipman
Keyword(s):  
Spectral Invariance ◽  
Invariance Hypothesis ◽  
Polarized Reflectance

Spectral Invariance Hypothesis Study of Polarized Reflectance With the Ground-Based Multiangle SpectroPolarimetric Imager

2019 ◽  
Vol 57 (10) ◽  
pp. 8191-8207 ◽  
Author(s):  
Christine L. Bradley ◽  
David J. Diner ◽  
Feng Xu ◽  
Meredith Kupinski ◽  
Russell A. Chipman
Keyword(s):  
Spectral Invariance ◽  
Invariance Hypothesis ◽  
Polarized Reflectance

scholarly journals Unemployment invariance hypothesis and structural breaks in Poland

2021 ◽  
Vol 24 ◽  
pp. e00198
Author(s):  
Emilio Congregado ◽  
Ewa Gałecka-Burdziak ◽  
Antonio A. Golpe ◽  
Robert Pater
Keyword(s):  
Structural Breaks ◽  
Invariance Hypothesis

Optical polarized reflectance characterization of thin aerogel and xerogel films

1998 ◽  
Vol 225 ◽  
pp. 19-23 ◽  
Author(s):  
J.L Hostetler ◽  
D Stewart ◽  
C.E Daitch ◽  
C.S Ashley ◽  
P.M Norris
Keyword(s):  
Xerogel Films ◽  
Polarized Reflectance

Fractal X-ray time variability and spectral invariance of the Seyfert galaxy NGC5506

Nature ◽  
1987 ◽  
Vol 325 (6106) ◽  
pp. 696-698 ◽  
Author(s):  
Ian McHardy ◽  
Bozena Czerny
Keyword(s):  
Seyfert Galaxy ◽  
Time Variability ◽  
Spectral Invariance ◽  
X Ray

scholarly journals Multiangular Polarized Characteristics of Optically Thin Cirrus in the Visible and Near-Infrared Spectral Region

2010 ◽  
Vol 67 (3) ◽  
pp. 749-768 ◽  
Author(s):  
T. H. Cheng ◽  
X. F. Gu ◽  
L. F. Chen ◽  
T. Yu ◽  
G. L. Tian
Keyword(s):  
Optical Thickness ◽  
Near Infrared ◽  
Global Climate ◽  
Sensitivity Study ◽  
Radiation Budget ◽  
Sensitivity Index ◽  
Transfer Program ◽  
Conceptual Approach ◽  
Spectral Bands ◽  
Polarized Reflectance

Abstract Optically thin cirrus play a key role in the earth’s radiation budget and global climate change. Their radiative effects depend critically on the thin cirrus optical and microphysical properties. In this paper, inhomogeneous hexagonal monocrystals (IHMs), which consist of a pure hexagon with spherical air bubble or aerosol inclusions, are applied to calculate the single-scattering properties of individual ice crystals. The multiangular polarized characteristics of optically thin cirrus for the 0.865- and 1.38-μm spectral bands are simulated on the basis of an adding–doubling radiative transfer program. The sensitivity of total and polarized reflectance at the top of the atmosphere (TOA) to different aerosol, cirrus, and surface parameters is studied. A new sensitivity index is introduced to further quantify the sensitivity study. The TOA polarized reflectance measured by the Polarization and Directionality of the Earth’s Reflectance (POLDER) instruments is compared to simulated TOA total and polarized reflectance. The test results are reasonable, although small deviations caused by the change of aerosol properties and thin cirrus optical thickness do exist. Finally, on the basis of the sensitivity study, a conceptual approach is suggested to simultaneously retrieve thin cirrus clouds’ optical thickness, ice particle shape, and the underlying aerosol optical thickness using the TOA total and polarized reflectance of the 0.865- and 1.38-μm spectral bands measured at multiple viewing angles.

scholarly journals Unravelling the Trading Invariance Hypothesis

2016 ◽  
Author(s):  
Michael Benzaquen ◽  
Jonathan Donier ◽  
Jean-Philippe Bouchaud
Keyword(s):  
Invariance Hypothesis
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