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Proceedings Paper

Optical fluorescent hygrometer for water vapor low concentration measurements
Author(s): Vladimir Yushkov; Alexander Lukjanov; Serafim Merkulov; Mikhail Khaplanov; Ludmila Shyshatzkaya; Jorg Gumbel
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Paper Abstract

An optical hygrometer has been developed to make night-time measurements of water vapor in the upper atmosphere using the technique of photofragment fluorescence. Hygrometer uses the fluoroscence at wavelengths near 310 nm of excited OH molecules produced in the photodissociation of water molecules by UV radiation with hydrogen lamp (121.6 nm). A coaxial optical scheme is used. A compact hydrogen lamp is aligned along the axis of the instrument, inside the annular fast focusing optics. It provides the effective convergence of fluorescence from a large angle and thus increase the sensitivity of this method. The modulation of the hydrogen lamp with the frequency 1 kHz is used. Specially designed laboratory technique for calibration of the hygrometer is described. Total weight of the optical hygrometer is about 3 kg. It can be easily integrated with the Vaisala RS-80 radio sonde. This allows us to obtain reliable real-time data on temperature, pressure, and water vapor concentrations in the upper troposphere and stratosphere.

Paper Details

Date Published: 20 September 1995
PDF: 12 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221083
Show Author Affiliations
Vladimir Yushkov, Central Aerological Observatory (Russia)
Alexander Lukjanov, Central Aerological Observatory (Russia)
Serafim Merkulov, Central Aerological Observatory (Russia)
Mikhail Khaplanov, Central Aerological Observatory (Russia)
Ludmila Shyshatzkaya, S.I. Vavilov State Optical Institute (Russia)
Jorg Gumbel, Stockholm Univ. (Sweden)

Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements
Peter Fabian; Volker Klein; Maurus Tacke; Konradin Weber; Christian Werner, Editor(s)

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