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



Downloads per month over past year

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

[thumbnail of zamorano134postprint.pdf]

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


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.

Item Type:Article
Additional Information:

© 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

Origin of downloads

Repository Staff Only: item control page