Automated low-cost LED-Based sun photometer for city scale distributed measurements
Author
dc.contributor.author
Garrido, Cristóbal
Author
dc.contributor.author
Toledo, Felipe
Author
dc.contributor.author
Díaz Quezada, Marcos Andrés
Author
dc.contributor.author
Rondanelli Rojas, Roberto Francisco
Admission date
dc.date.accessioned
2022-05-26T15:12:47Z
Available date
dc.date.available
2022-05-26T15:12:47Z
Publication date
dc.date.issued
2021
Cita de ítem
dc.identifier.citation
Remote Sens. 2021, 13, 4585
es_ES
Identifier
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10.3390/rs13224585
Identifier
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https://repositorio.uchile.cl/handle/2250/185712
Abstract
dc.description.abstract
We propose a monochromatic low-cost automatic sun photometer (LoCo-ASP) to perform
distributed aerosol optical depth (AOD) measurements at the city scale. This kind of network could
fill the gap between current automatic ground instruments—with good temporal resolution and
accuracy, but few devices per city and satellite products—with global coverage, but lower temporal
resolution and accuracy-. As a first approach, we consider a single equivalent wavelength around
408 nm. The cost of materials for the instrument is around 220 dollars. Moreover, we propose a
calibration transfer for a pattern instrument, and estimate the uncertainties for several units and
due to the internal differences and the calibration process. We achieve a max MAE of 0.026 for 38
sensors at 408 nm compared with AERONET Cimel; a mean standard deviation of 0.0062 among our
entire sensor for measurement and a calibration uncertainty of 0.01. Finally, we perform city-scale
measurements to show the dynamics of AOD. Our instrument can measure unsupervised, with an
expected error for AOD between 0.02 and 0.03.
es_ES
Patrocinador
dc.description.sponsorship
United States Department of Defense
Air Force Office of Scientific Research (AFOSR) FA9550-18-1-0249
CONICYT-QUIMAL 190004
CONICYT-PFCHA/MagisterNacional 2018-2218120
es_ES
Lenguage
dc.language.iso
en
es_ES
Publisher
dc.publisher
MDPI
es_ES
Type of license
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 United States