Pravettoni, Mauro and Strepparava, Davide and Cereghetti, Nerio and Klett, Stefano and Andretta, Marco and Steiger, Marco (2016) Indoor calibration of Sky Quality Meters: linearity, spectral responsivity and uncertainty analysis. Journal of Quantitative Spectroscopy and Radiative Transfer, 181. pp. 74-86. ISSN 0022-4073
Full text not available from this repository.Abstract
The indoor calibration of brightness sensors requires extremely low values of irradiance in the most accurate and reproducible way. In this work the testing equipment of an ISO 17025 accredited laboratory for electrical testing, qualification and type approval of solar photovoltaic modules was modified in order to test the linearity of the instruments from few mW/cm 2 down to fractions of nW/cm 2 , corresponding to levels of simulated brightness from 6 to 19 mag/arcsec 2 . Sixteen Sky Quality Meter (SQM) produced by Unihedron, a Canadian manufacturer, were tested, also assessing the impact of the ageing of their protective glasses on the calibration coefficients and the drift of the instruments. The instruments are in operation on measurement points and observatories at different sites and altitudes in Southern Switzerland, within the framework of OASI, the Environmental Observatory of Southern Switzerland. The authors present the results of the calibration campaign: linearity; brightness calibration, with and without protective glasses; transmittance measurement of the glasses; and spectral responsivity of the devices.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Uncontrolled Keywords: | Light pollution; Night sky brightness; Photometry; Calibration; Spectral responsivity; Solar simulators |
| Subjects: | Physical sciences > Physics > Applied physics Physical sciences > Physics > Applied physics > Engineering physics Physical sciences > Physics > Environmental physics > Atmospheric physics Physical sciences > Physics > Optical physics Physical sciences > Astronomy > Solar & solar terrestrial physics Physical sciences > Astronomy > Astronomy observation |
| Department/unit: | Dipartimento ambiente costruzioni e design > Istituto sostenibilità applicata all'ambiente costruito |
| Depositing User: | Mauro Pravettoni |
| Date Deposited: | 20 Jun 2016 08:36 |
| Last Modified: | 20 Jun 2016 08:36 |
| URI: | http://repository.supsi.ch/id/eprint/7186 |
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