NDLI: Atmosphere continuum absorption investigation at MM waves

Content Provider	IEEE Xplore Digital Library
Author	Serov, E.A. Koshelev, M.A. Parshin, V.V. Tretyakov, M.Yu.
Copyright Year	2010
Description	Author affiliation: Institute of Applied Physics Russian Academy of Science, Ulyanov Street 46, Nizhny Novgorod, 603950, Russia (Serov, E.A.; Koshelev, M.A.; Parshin, V.V.; Tretyakov, M.Yu.)
Abstract	Investigation of atmospheric gases spectral properties is demanded to develop absorption models. Such models are very important for the global Earth's atmosphere monitoring. Most of atmospheric lines and continuum spectral parameters are obtained in laboratory experiments. Recovered atmospheric parameters accuracy of depends directly on accuracy of laboratory measurements. Parameterization of the continuum absorption, in particular, the water vapor continuum is one of the most difficult problems. The problem is related to yet unknown physical origin of the continuum, its weakness in comparison with absorption in regular discrete lines of water molecule, and general difficulties of the water-related measurements. The water-related continuum broadband measurement by the resonator spectrometer [1] revealed strong influence of water adsorbing on resonator elements on results of the continuum parameters measurements. Analysis [2] of the MM/SubMM continuum measurement methods used in the earlier studies leads to the conclusion that water adsorbing onto mirrors was a common factor influencing the water-related continuum parameters obtained in all well-known laboratory experiments. In all these cases gas cells with multiple reflections of radiation off inner mirrors were used as the most appropriate technique for weak continuum absorption investigation, although the problem of separation of water vapor absorption and absorption by water adsorbed on mirrors was not solved in the experiments. To overcome the problem it was proposed to use the cavity length variation method [1], which permits separation of these two types of absorptions and, as a result, the accuracy of continuum absorption measurements increases.
Starting Page	1
Ending Page	3
File Size	318985
Page Count	3
File Format	PDF
ISBN	9781424479009
e-ISBN	9781424478996
DOI	10.1109/MSMW.2010.5546047
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-21
Publisher Place	Ukraine
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Absorption Atmosphere
Content Type	Text
Resource Type	Article

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