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Zernike power spectra of clear and cloudy light-polluted urban night skies

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Bará, Salvador and Tilve, Victor and Nievas Rosillo, Mireia and Sánchez de Miguel, Alejandro and Zamorano Calvo, Jaime (2015) Zernike power spectra of clear and cloudy light-polluted urban night skies. Applied optics, 54 (13). pp. 4120-4129. ISSN 1559-128X

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Official URL: http://dx.doi.org/10.1364/AO.54.004120


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Abstract

The Zernike power spectra of the all-sky night brightness distributions of clear and cloudy nights are computed using a modal projection approach. The results obtained in the B, V, and R Johnson-Cousins' photometric bands during a one-year campaign of observations at a light-polluted urban site show that these spectra can be described by simple power laws with exponents close to -3 for clear nights and -2 for cloudy ones. The second-moment matrices of the Zernike coefficients show relevant correlations between modes. The multiplicative role of the cloud cover, that contributes to a significant increase of the brightness of the urban night sky in comparison with the values obtained on clear nights, is described in the Zernike space.


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© 2015 Optical Society of America.
This work was partially funded by the Xunta de Galicia, Programa de Consolidación e Estruturación de Unidades de Investigación Competitivas, grant CN 2012/156, the Spanish Ministry of Science and Innovation MICINN (AYA2012-30717, AYA2012-31277, AYA2013-46724-P, and FPA2010-22056-C06- 06), the Spanish program of International Campus of Excellence Moncloa (CEI) and the Madrid Regional Government through the SpaceTec Project (S2013/ICE-2822). A. Sánchez de Miguel was supported by an FPU grant from MICINN. This work was developed within the framework of the Spanish Network for Light Pollution Studies (Ministerio de Economía y Competitividad, Acción Complementaria AYA2011-15808-E). Useful comments from two anonymous reviewers are also acknowledged.

Uncontrolled Keywords:Eye aberration coefficients; Sky brightness; Expansion coefficients; Pupil sizes; CCD camera; Transformation; Aperture; Skyglow; System; Model
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:32570
Deposited On:04 Aug 2015 09:08
Last Modified:10 Dec 2018 15:05

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