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    Reduction of Nonuniform Beamfilling Effects by Multiple Constraints: A Simulation Study

    Source: Journal of Atmospheric and Oceanic Technology:;2015:;volume( 032 ):;issue: 011::page 2114
    Author:
    Short, David A.
    ,
    Meneghini, Robert
    ,
    Emory, Amber E.
    ,
    Schwaller, Mathew R.
    DOI: 10.1175/JTECH-D-15-0021.1
    Publisher: American Meteorological Society
    Abstract: spaceborne precipitation radar samples the vertical structure of precipitating hydrometeors from the top down. The viewing geometry and operating frequency result in certain limitations and opportunities. Among the limitations is attenuation of the radar signal that can cause the measured radar reflectivity factor to be substantially less than the desired quantity, the true radar reflectivity factor. Another error source is the spatial variability in precipitation rates that occurs at scales smaller than the sensor field of view (FOV), giving rise to the nonuniform beamfilling (NUBF) effect. The opportunities arise when the radar return from the surface can be used to obtain constraints on the path-integrated attenuation (PIA) for use in hybrid attenuation correction algorithms. The surface return can also provide some information on the degree of NUBF at off-nadir viewing angles. In this paper ground-based radar data are used to simulate spaceborne radar data at nadir and off-nadir viewing angles at Ku band and Ka band and to test attenuation correction algorithms in the presence of nonuniform beamfilling. The cross-FOV gradient in PIA is found to be an important characteristic for describing the performance of attenuation correction algorithms.
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      Reduction of Nonuniform Beamfilling Effects by Multiple Constraints: A Simulation Study

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4228643
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    contributor authorShort, David A.
    contributor authorMeneghini, Robert
    contributor authorEmory, Amber E.
    contributor authorSchwaller, Mathew R.
    date accessioned2017-06-09T17:26:09Z
    date available2017-06-09T17:26:09Z
    date copyright2015/11/01
    date issued2015
    identifier issn0739-0572
    identifier otherams-85220.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4228643
    description abstractspaceborne precipitation radar samples the vertical structure of precipitating hydrometeors from the top down. The viewing geometry and operating frequency result in certain limitations and opportunities. Among the limitations is attenuation of the radar signal that can cause the measured radar reflectivity factor to be substantially less than the desired quantity, the true radar reflectivity factor. Another error source is the spatial variability in precipitation rates that occurs at scales smaller than the sensor field of view (FOV), giving rise to the nonuniform beamfilling (NUBF) effect. The opportunities arise when the radar return from the surface can be used to obtain constraints on the path-integrated attenuation (PIA) for use in hybrid attenuation correction algorithms. The surface return can also provide some information on the degree of NUBF at off-nadir viewing angles. In this paper ground-based radar data are used to simulate spaceborne radar data at nadir and off-nadir viewing angles at Ku band and Ka band and to test attenuation correction algorithms in the presence of nonuniform beamfilling. The cross-FOV gradient in PIA is found to be an important characteristic for describing the performance of attenuation correction algorithms.
    publisherAmerican Meteorological Society
    titleReduction of Nonuniform Beamfilling Effects by Multiple Constraints: A Simulation Study
    typeJournal Paper
    journal volume32
    journal issue11
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH-D-15-0021.1
    journal fristpage2114
    journal lastpage2124
    treeJournal of Atmospheric and Oceanic Technology:;2015:;volume( 032 ):;issue: 011
    contenttypeFulltext
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    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian