Satellite measurements of artificial light at night: aerosol effects

Author:

Cavazzani S12,Ortolani S12,Bertolo A3,Binotto R3,Fiorentin P4,Carraro G1ORCID,Zitelli V5

Affiliation:

1. Department of Physics and Astronomy, University of Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy

2. INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy

3. Regional Environmental Prevention and Protection Agency of Veneto, Via Ospedale Civile 24, I-35121 Padova, Italy

4. Department of Industrial Engineering, University of Padova, Via Gradenigo 6a, I-35131 Padova, Italy

5. INAF-OAS Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Gobetti 93/3, I-40129 Bologna, Italy

Abstract

ABSTRACT The study of artificial light at night (ALAN) by satellite is very important for the analysis of new astronomical sites and for the long-term temporal evolution observation of the emission from the ground. The analysis of satellite data presents many advantages but also some critical points because of fluctuations in measurements. The main result of this paper is the discovery of a correlation between these fluctuations and the aerosol concentration combined with cloud cover and lunar cycles. In this work, we also present a mathematical empirical model for the light pollution propagation study in relation to the aerosol concentration detected by satellite. We apply this model to the astronomical site of Asiago (Ekar Observatory) providing a possible explanation for the temporal ALAN fluctuations detected by satellite. Finally, we validate the results with the ground collected data.

Funder

Istituto Nazionale di Astrofisica

Ministero dell’Istruzione, dell’Università e della Ricerca

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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