| Titel: | Prispectemp Project in Progress: New Measurements of A-Band of Oxygen in Pure Gas and Mixtures with Nitrogen |
| Autoren: |
Berezkin, Kirill, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.1, Allgemeine und Anorganische Chemie, ORCID: 0009-0000-8873-521X Lüttschwager, Alexandra, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.1, Allgemeine und Anorganische Chemie, ORCID: 0000-0002-3934-6805 Stosch, Rainer, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.1, Allgemeine und Anorganische Chemie, ORCID: 0000-0001-7694-5519 Li, Gang, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.1, Allgemeine und Anorganische Chemie, ORCID: 0000-0002-5605-7896 |
| Beitragende: | HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887 |
| Seiten: | 1 |
| Sprache: | en |
| DOI: | 10.7795/810.20240911A |
| Art der Ressource: | Text / Poster |
| Herausgeber: | Physikalisch-Technische Bundesanstalt (PTB) |
| Rechte: | Download for personal/private use only, if your national copyright law allows this kind of use. |
| Daten: |
Verfügbar: 2024-09-11 |
| Datei: |
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| Schlagworte | astronomy/atmospheres ; remote sensing ; small molecules ; infrared ; visible ; intensities and lineshapes ; oxygen |
| Zusammenfassung: | Oxygen is uniformly distributed in the Earth atmosphere so its absorbance is very useful for intensity calibrations in the spectra recorded by satellite and ground-based instruments in very different atmospheric conditions [1]. The oxygen A-band does not overlap with other atmospheric species, it is also very weak and do not saturate when measured over long pathlengths [2]. Knowledge of the band structure, intensities and collisional parameters is absolutely important, but remains a challenge for both theoretical and experimental investigations. Within the frame of PriSpecTemp project [3], a set of absorption spectra of pure oxygen and its mixtures with nitrogen were recorded in the pressure range between 450 and 1100 hPa. Experimental parameters, such as pressure, temperature and path were calibrated and traceable. Extensive uncertainty evaluation for every wavenumber in every spectrum was performed. In a few instances we followed a similar procedure, used in our recent publications [4, 5] and generated composite spectra from the measurements of the same sample at different pathlengths. The integrated absorption cross sections are in agreement with the results of previous studies. Line-by-line fits and analysis of individual parameters are ongoing. The spectra were recorded using a Bruker IFS 125HR spectrometer at the PTB FTIR infrastructure. References: [1] B. J. Droin, D. C. Benner, L. R. Brown, et al., JQSRT 186, 118 (2017). [2] D. A. Long, D. K. Havey, M. Okumura, et al., JQSRT 111, 2021 (2010). [3] EURAMET Metrology Partnership project “Primary Spectrometric Thermometry for Gases” (22IEM03 PriSpecTemp), https://www.prispectemp.ptb.de/home [4] A. Domanskaya, K. Berezkin, G. Li, et al., JQSRT 311, 108790 (2023). [5] A. Domanskaya, K. Berezkin, G. Li, et al., JQSRT 317, 108922 (2024). |
| Förderung: | European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Primary spectrometric thermometry for gases, Grant Number: EMPIR 22IEM03 PriSpecTemp |