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Atmospheric sounding near 118 GHzThe thermal emission spectrum of the atmosphere near the 118 GHz oxygen resonance has been measured from the NASA Convair-990 aircraft as it flew over clear air and storms. The instrument viewed the ground 45 deg from nadir with a 7.5 deg beamwidth. Brightness temperatures were measured in six bands 200 MHz wide centered at frequencies 821-1891 MHz from the line at 118.7505 GHz. The double-sideband super-heterodyne receiver had 1 K sensitivity for 1 s integration. Comparison of observed clear air brightness temperatures (from 238 mb) with those computed for a coincident dropsonde yielded agreement within 1.4 K; the retrieved temperature profile agreed with the dropsonde with an average magnitude error of 1.4 K.
Document ID
19810029356
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ali, A. D. S.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Rosenkranz, P. W.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Staelin, D. H.
(MIT Cambridge, Mass., United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1980
Publication Information
Publication: Journal of Applied Meteorology
Volume: 19
Subject Category
Geophysics
Accession Number
81A13760
Funding Number(s)
CONTRACT_GRANT: F19628-75-C-0122
CONTRACT_GRANT: NAS5-23677
Distribution Limits
Public
Copyright
Other

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