RT Journal Article
T1 Controlling the artificial radiance of the night sky: The Añora urban laboratory
A1 Zamorano Calvo, Jaime
A1 Bará, Salvador
A1 Barco, Manuel
A1 García, Cristóbal
A1 Caballero, Antonio Luis
AB We provide radiometric evidence of the relevance of nearby light sources on the artificial brightness of the night sky. To obtain the required data we developed a method based on the use of power-regulated urban lighting systems, which also provides relevant information on the propagation of light pollution at short distances from the sources. A controlled experiment was carried out in the Andalusian municipality of Añora (1526 inhab.) in which the radiant power of its regulated public outdoor lighting system was modified in a predefined way during the central part of the night while continuously recording the zenithsky brightness in the TESS-W photometric band from two separate locations inside the town. We determined that the power regulated streetlight sources contribute a 60–62% to the total zenith sky brightness at these observing locations in clear and moonless nights when operated at their maximum power rating, being the remaining sky radiance due to constant local sources and sources from neighboring towns.These results, in combination with georeferenced information on the sources’ location and properties, impose some constraints on the functional form of the effective point-spread functions (PSF) of the zenith sky brightness at short distances from the sources. For the conditions of our experiment we have found that the expected exponents of power-law PSFs are close to -1.
SN 0022-4073
YR 2022
FD 2022
LK https://hdl.handle.net/20.500.14352/72802
UL https://hdl.handle.net/20.500.14352/72802
LA spa
NO CRUE-CSIC (Acuerdos Transformativos 2022)
NO Ministerio de Ciencia Innovación (España)
DS Docta Complutense
RD 26 nov 2025