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Proceedings Paper

Performance of a microwave radiometer with an acousto-optical spectrum analyzer for ozone measurements
Author(s): Nelli A. Esepkina; Sergey K. Kruglov; V. N. Leonov; Alexander N. Lukin; Sergey B. Rozanov; Igor I. Saenko; Sergey V. Solomonov
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Paper Abstract

Continuous observations of the ozone layer and key constituents of ozone destruction are of primary importance for objective evaluation and forecasting the regional and global ozone layer depletion. Measurements of trace gas contents in the atmosphere require the use of highly sensitive and precise techniques and instruments. Millimeter-wave heterodyne spectroscopy is successfully used for ground based measuring of the atmospheric ozone at altitudes from about 15 to 80 km. Main features of the advanced system, based on a heterodyne receiver for the 142.2 GHz ozone spectral line measurements and 500-MHz acousto-optical spectrometer (AOS) are described. Key parts of the radiometer front-end, including input optics, low-noise Schottky diode mixer, and AOS are considered, as well as structure and performance of the data acquisition system. The characteristics and capabilities of this setup have been studied. Some performance characteristics of the acousto-optical spectrometer for the millimeter-wave radiometer are discussed. The main attention is given to the long-term stability of the AOS's parameters. Long-term amplitude stability estimations are based on the Allan variance method. Some initial results of ozone observations are presented.

Paper Details

Date Published: 19 June 2003
PDF: 8 pages
Proc. SPIE 5066, Lasers for Measurements and Information Transfer 2002, (19 June 2003); doi: 10.1117/12.501667
Show Author Affiliations
Nelli A. Esepkina, St. Petersburg State Polytechnical Univ. (Russia)
Sergey K. Kruglov, St. Petersburg State Polytechnical Univ. (Russia)
V. N. Leonov, P.N. Lebedev Physical Institute (Russia)
Alexander N. Lukin, P.N. Lebedev Physical Institute (Russia)
Sergey B. Rozanov, P.N. Lebedev Physical Institute (Russia)
Igor I. Saenko, St. Petersburg State Polytechnical Univ. (Russia)
Sergey V. Solomonov, P.N. Lebedev Physical Institute (Russia)

Published in SPIE Proceedings Vol. 5066:
Lasers for Measurements and Information Transfer 2002
Vadim E. Privalov, Editor(s)

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