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Radiometric observations of the 752.033-GHz rotational absorption line of H2O from a laboratory jetWith the aid of a high-resolution two-stage heterodyne radiometer, spectral absorption measurements of the 752.033 GHz line of water vapor were carried out, using a blackbody continuum as a background radiation source for investigating the absorptive properties of the H2O content of high altitude rocket plumes. To simulate this physical situation in a laboratory environment, a small steam jet was operated within a large high-vacuum chamber, with the H2O jet plume traversing the radiometer line of sight. The experiments verified that this rotational line is optically thick, with excitation temperatures below 100 K, in the downstream part of the plume, as predicted by theoretical modelling.
Document ID
19800067786
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dionne, G. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Fitzgerald, J. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chang, T.-S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Fetterman, H. R.
(MIT, Lincoln Laboratory, Lexington Mass., United States)
Litvak, M. M.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1980
Publication Information
Publication: International Journal of Infrared and Millimeter Waves
Volume: 1
Subject Category
Atomic And Molecular Physics
Report/Patent Number
ESD-TR-81-31
AD-A100909
Accession Number
80A51956
Distribution Limits
Public
Copyright
Other

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