High-resolution spectrometer for atmospheric studies

Details High-resolution spectrometer for atmospheric studies High-resolution spectrometer for atmospheric studies

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.1383d&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 12, p. 1383-1388.

Physics

Remote Sensing, Atmospheric Spectroscopy, Fraunhofer Lines, Ring Effect

Scientific paper

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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