Spectral analysis of deviations from key comparison reference values
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-02-02
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Language
en
Pages
8
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Metrologia, Volume 61, issue 1
Abstract
When studying the results of the key comparisons of spectral quantities, it appears that in many cases participants’ results systematically deviate from the key comparison reference values over a limited spectral range. We carried out spectral analysis of such deviations in seven key comparisons of optical radiometry. The results reveal an approximate outcome that, on the average, each harmonic amplitude is inversely proportional to the order of the harmonic in all studied key comparisons. This new finding gives important information on the characteristics of spectral correlations. The result can be used in the uncertainty evaluation of spectral integrals, where the effect of unknown spectral correlations has earlier been challenging to assess quantitatively.Description
Funding Information: The Project 19ENV04 Metrology for Aerosol Optical Properties (MAPP) leading to this publication has received funding from the EMPIR programme co-financed by the Participating States and the European Union’s Horizon 2020 research and innovation programme. This work is partly funded by the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision Number: 320167. We thank Sami Talvitie for developing the fitting software especially in the case of Legendre polynomials. Publisher Copyright: © 2023 The Author(s). Published on behalf of BIPM by IOP Publishing Ltd.
Keywords
correlated color temperature, correlated quantities, key comparison, spectral irradiance, uncertainty
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Citation
Maham, K, Kosonen, V, Peltoniemi, J, Kärhä, P & Ikonen, E 2024, ' Spectral analysis of deviations from key comparison reference values ', Metrologia, vol. 61, no. 1, 015002 . https://doi.org/10.1088/1681-7575/ad0c9e