Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Zernike analysis of all-sky night brightness maps

Not Accessible

Your library or personal account may give you access

Abstract

All-sky night brightness maps (calibrated images of the night sky with hemispherical field-of-view (FOV) taken at standard photometric bands) provide useful data to assess the light pollution levels at any ground site. We show that these maps can be efficiently described and analyzed using Zernike circle polynomials. The relevant image information can be compressed into a low-dimensional coefficients vector, giving an analytical expression for the sky brightness and alleviating the effects of noise. Moreover, the Zernike expansions allow us to quantify in a straightforward way the average and zenithal sky brightness and its variation across the FOV, providing a convenient framework to study the time course of these magnitudes. We apply this framework to analyze the results of a one-year campaign of night sky brightness measurements made at the UCM observatory in Madrid.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Zernike power spectra of clear and cloudy light-polluted urban night skies

Salvador Bará, Víctor Tilve, Miguel Nievas, Alejandro Sánchez de Miguel, and Jaime Zamorano
Appl. Opt. 54(13) 4120-4129 (2015)

Spectral Radiance in the S20-Range and Luminance of the Clear and Overcast Night Sky

D. H. Höhn and W. Büchtemann
Appl. Opt. 12(1) 52-61 (1973)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (19)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved