{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:29:55Z","timestamp":1760232595769,"version":"build-2065373602"},"reference-count":51,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2022,11,16]],"date-time":"2022-11-16T00:00:00Z","timestamp":1668556800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>A very wide-used instrument for the measurement of the Night Sky Brightness (NSB) is the Sky Quality Meter (SQM). One of its important issues is tracking NSB for long time and connecting its variations to changes in outdoor lighting. The stability of these radiometers is fundamental; variation on the instrument behaviour could be confused with changes of the sky brightness. The SQMs of the network of the Veneto Region (Italy) and the SQM installed at La Silla (Chile) are analysed by using the twilight method considering both sunset and dawn measurements, which allows to compensate for shifts in the SQM internal clock. The slope of the observed long-term trends ranges between 29 \u00b1 5 and 86 \u00b1 22 mmagSQM arcsec\u22122 year\u22121. These high values require a correction of the measurements to continue to track NSB by those instruments. The correction is presented for an Italian site, for example: raw measures show an apparent trend towards darker sky (30 \u00b1 5 mmagSQM arcsec\u22122 year\u22121), after the correction a clear tendency towards a brighter polluted sky appears (\u221221 \u00b1 8 mmagSQM arcsec\u22122 year\u22121), in agreement with the estimated trend of the installed luminous flux of outdoor lighting for that area.<\/jats:p>","DOI":"10.3390\/rs14225787","type":"journal-article","created":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T03:27:44Z","timestamp":1668655664000},"page":"5787","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0583-4103","authenticated-orcid":false,"given":"Pietro","family":"Fiorentin","sequence":"first","affiliation":[{"name":"Department of Industrial Engineering, University of Padova, 35131 Padova, Italy"}]},{"given":"Renata","family":"Binotto","sequence":"additional","affiliation":[{"name":"Regional Environmental Prevention and Protection Agency of Veneto, 35121 Padova, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7753-2185","authenticated-orcid":false,"given":"Stefano","family":"Cavazzani","sequence":"additional","affiliation":[{"name":"Department of Mechanical and Industrial Engineering, NTNU, Gloshaugen, Richard Birkelands vei 2b, 7034 Trondheim, Norway"},{"name":"Department of Physics and Astronomy, University of Padova, 35121 Padova, Italy"},{"name":"INAF\u2014Osservatorio Astronomico di Padova, 35122 Padova, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0582-6541","authenticated-orcid":false,"given":"Andrea","family":"Bertolo","sequence":"additional","affiliation":[{"name":"Regional Environmental Prevention and Protection Agency of Veneto, 35121 Padova, Italy"}]},{"given":"Sergio","family":"Ortolani","sequence":"additional","affiliation":[{"name":"Department of Physics and Astronomy, University of Padova, 35121 Padova, Italy"},{"name":"INAF\u2014Osservatorio Astronomico di Padova, 35122 Padova, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5878-5299","authenticated-orcid":false,"given":"Ivo","family":"Saviane","sequence":"additional","affiliation":[{"name":"European Southern Observatory, Santiago 7630000, Chile"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"259","DOI":"10.1582\/LEUKOS.2010.06.04001","article-title":"The world\u2019s appetite for light: Empirical data and trends spanning three centuries and six continents","volume":"6","author":"Tsao","year":"2010","journal-title":"Leukos"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1028","DOI":"10.3390\/su7011028","article-title":"New Framework of Sustainable Indicators for Outdoor LED (Light Emitting Diodes) Lighting and SSL (Solid State Lighting)","volume":"7","year":"2015","journal-title":"Sustainability"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1118","DOI":"10.1136\/jech-2015-206012","article-title":"The effect of reduced street lighting on road casualties and crime in England and Wales: Controlled interrupted time series analysis","volume":"69","author":"Steinbach","year":"2015","journal-title":"J. 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