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    System Noise in the NESDIS TOVS Forward Model. Part I: Specification

    Source: Journal of Applied Meteorology:;1994:;volume( 033 ):;issue: 008::page 919
    Author:
    Uddstrom, M. J.
    ,
    McMillin, L. M.
    DOI: 10.1175/1520-0450(1994)033<0919:SNITNT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The National Environmental Satellite Data and Information Service (NESDIS) collocation data archive of satellite and radiosonde measurements is used to investigate errors in in situ radiosonde data and a NESDIS-like radiative transfer forward model. It is shown that the radiative transfer model errors have a strong airmass dependence and that these errors are not primarily due to nonrepresentativeness or radiosonde errors. However, errors in the in situ data do exist. For example, the National Meteorological Center radiosonde radiation adjustment algorithm in use during the period of data collection (1989?90) does not appear to provide adjustments of uniform quality across radiosonde sounding systems. The total system noise appropriate for use in retrieval algorithms is shown to vary from values close to the radiometer noise equivalent temperature difference (NE?T) specifications for stratospheric channels to several times the NE?T values for lower-tropospheric channels. Because of the significant discrepancies between measured and modeled radiances for the two most opaque water vapor sounding channels of the TIROS Operational Vertical Sounder, their use in a physical retrieval algorithm is considered problematic. Evidence for errors in NESDIS cloud-cleared (equivalent clear column) radiance temperature estimates is presented.
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      System Noise in the NESDIS TOVS Forward Model. Part I: Specification

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4147365
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    contributor authorUddstrom, M. J.
    contributor authorMcMillin, L. M.
    date accessioned2017-06-09T14:04:57Z
    date available2017-06-09T14:04:57Z
    date copyright1994/08/01
    date issued1994
    identifier issn0894-8763
    identifier otherams-12067.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4147365
    description abstractThe National Environmental Satellite Data and Information Service (NESDIS) collocation data archive of satellite and radiosonde measurements is used to investigate errors in in situ radiosonde data and a NESDIS-like radiative transfer forward model. It is shown that the radiative transfer model errors have a strong airmass dependence and that these errors are not primarily due to nonrepresentativeness or radiosonde errors. However, errors in the in situ data do exist. For example, the National Meteorological Center radiosonde radiation adjustment algorithm in use during the period of data collection (1989?90) does not appear to provide adjustments of uniform quality across radiosonde sounding systems. The total system noise appropriate for use in retrieval algorithms is shown to vary from values close to the radiometer noise equivalent temperature difference (NE?T) specifications for stratospheric channels to several times the NE?T values for lower-tropospheric channels. Because of the significant discrepancies between measured and modeled radiances for the two most opaque water vapor sounding channels of the TIROS Operational Vertical Sounder, their use in a physical retrieval algorithm is considered problematic. Evidence for errors in NESDIS cloud-cleared (equivalent clear column) radiance temperature estimates is presented.
    publisherAmerican Meteorological Society
    titleSystem Noise in the NESDIS TOVS Forward Model. Part I: Specification
    typeJournal Paper
    journal volume33
    journal issue8
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1994)033<0919:SNITNT>2.0.CO;2
    journal fristpage919
    journal lastpage938
    treeJournal of Applied Meteorology:;1994:;volume( 033 ):;issue: 008
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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