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High-resolution spectrometer for atmospheric studies
Authors:Piero Di Carlo  Massimiliano Barone  Alfonso D’Altorio  Cesare Dari-Salisburgo  Ermanno Pietropaolo
Affiliation:1. Dipartimento di Fisica, Università Degli Studi di L’Aquila, L’Aquila, Italy;2. Centre of Excellence—CETEMPS, Università Degli Studi di L’Aquila, L’Aquila, Italy;1. German Space Operation Center (GSOC), Germany;2. Astronomical Institute of the University of Bern (AIUB), Switzerland;1. Ghent University, Department of Analytical Chemistry, Krijgslaan 281 (S-12), B-9000 Ghent, Belgium;2. University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain;3. Faculty of Natural Sciences and Mathematics, Institute of Chemistry, ‘Ss.Cyril & Methodius’ University, Arhimedova 5, 1001 Skopje, Macedonia;4. University of Parma, Department of Physics, Parco Area delle Scienze 7/A, 43124 Parma, Italy;5. Ghent University, Department of Archaeology, Sint-Pietersnieuwstraat 35, B-9000 Ghent, Belgium;1. Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;2. University of Science and Technology of China, Hefei 230026, Anhui, China;3. National Engineering Research Center for Agro-Ecological Big Data Analysis & Application, Anhui University, Hefei 230601, China;1. Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan;2. School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
Abstract:A high-resolution spectrometer (0.0014 nm at 313 nm) has been developed at the University of L’Aquila (Italy) for atmospheric spectroscopic studies. The layout, optics and software for the instrument control are described. Measurements of the mercury low-pressure lamp lines from 200 to 600 nm show the high performances of the spectrometer. Laboratory measurements of OH and NO2 spectrums demonstrate that the system could be used for cross-section measurements and to detect these species in the atmosphere. The first atmospheric application of the system was the observation of direct solar and sky spectrums that shows a filling-in of the sky lines due to rotational Raman scattering. The measurements have been done with clear and cloudy sky and in both there was a strong dependence of the filling-in from the solar zenith angle whereas no dependence from the wavelengths was evident at low solar zenith angles (less than 85°).
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