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The impact of conventional surface data upon VAS regression retrievals in the lower troposphereSurface temperature and dewpoint reports are added to the infrared radiances from the VISSR Atmospheric Sounder (VAS) in order to improve the retrieval of temperature and moisture profiles in the lower troposphere. The conventional (airways) surface data are combined with the twelve VAS channels as additional predictors in a ridge regression retrieval scheme, with the aim of using all available data to make high resolution space-time interpolations of the radiosonde network. For one day of VAS observations, retrievals using only VAS radiances are compared with retrievals using VAS radiances plus surface data. Temperature retrieval accuracy evaluated at coincident radiosonde sites shows a significant impact within the boundary layer. Dewpoint retrieval accuracy shows a broader improvement within the lowest tropospheric layers. The most dramatic impact of surface data is observed in the improved relative spatial and temporal continuity of low-level fields retrieved over the Midwestern United States.
Document ID
19830019251
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Lee, T. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chesters, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mostek, A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
May 1, 1983
Subject Category
Geophysics
Report/Patent Number
NAS 1.15:83987
NASA-TM-83987
Accession Number
83N27522
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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