Effects of surface reflectance on skylight polarization measurements at the Mauna Loa Observatory | Zendy

Andrew R. Dahlberg | Zendy; Nathan J. Pust | Zendy; Joseph A. Shaw | Zendy

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Effects of surface reflectance on skylight polarization measurements at the Mauna Loa Observatory

Author(s) -

Andrew R. Dahlberg,

Nathan J. Pust,

Joseph A. Shaw

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.016008

Subject(s) - skylight , polarimeter , radiance , remote sensing , sky , polarization (electrochemistry) , optics , observatory , polarimetry , diffuse sky radiation , radiometer , environmental science , atmospheric optics , degree of polarization , geostationary operational environmental satellite , satellite , physics , geology , meteorology , astronomy , geography , scattering , chemistry , archaeology

An all-sky imaging polarimeter was deployed in summer 2008 to the Mauna Loa Observatory in Hawaii to study clear-sky atmospheric skylight polarization. The imager operates in five wavebands in the visible and near infrared spectrum and has a fisheye lens for all-sky viewing. This paper describes the deployment and presents comparisons of the degree of skylight polarization observed to similar data observed by Coulson with a principal-plane scanning polarimeter in the late 1970s. In general, the results compared favorably to those of Coulson. In addition, we present quantitative results correlating a variation of the maximum degree of polarization over a range of 70-85% to fluctuation in underlying surface reflectance and upwelling radiance data from the GOES satellite.

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