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- Title
Technique for Inverting Transmission Spectra to Measure Freon Concentration.
- Authors
Polyakov, A. V.; Virolainen, Ya. A.; Makarova, M. V.
- Abstract
We propose an approach to selecting the optimal parameters for solving the inverse problem for determining the total freon content (TC) from ground-based spectrometric measurements of solar radiation. The approach was developed for measurements at the St. Petersburg NDACC station using a Bruker FS125HR Fourier-transform interferometer and implemented as applied to measurements of the total content of the hydrochlorofluorocarbon R-22 (HCF2Cl). Based on the optimal set of parameters obtained, we retrieved the total R-22 content above the St. Petersburg station in the period 2009-2018 and obtained estimates of the measurement uncertainties: average systematic uncertainty 4.8%, random uncertainty 3.7% over the entire observational period. A preliminary estimate of the trend is 2.64 ± 0.22% per year.
- Subjects
SOLAR radiation; FOURIER transform infrared spectroscopy; PARAMETER estimation; HYDROCHLOROFLUOROCARBONS; TRANSPARENCY (Optics)
- Publication
Journal of Applied Spectroscopy, 2019, Vol 85, Issue 6, p1085
- ISSN
0021-9037
- Publication type
Article
- DOI
10.1007/s10812-019-00763-y