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    Biases of Rain Retrieval Algorithms for Spaceborne Radar Caused by Nonuniformity of Rain

    Source: Journal of Atmospheric and Oceanic Technology:;1991:;volume( 008 ):;issue: 003::page 363
    Author:
    Nakamura, Kenji
    DOI: 10.1175/1520-0426(1991)008<0363:BORRAF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The biases of various rain retrieval algorithms for a spaceborne rain radar due to nonuniformity of rain are studied using simple models and an actual time sequence of rainfall rate. A conventional rain retrieval algorithm in which measured radar reflectivity factors are simply converted to rainfall rates always overestimates the rainfall rate, but the bias is moderate. The surface reference method, which is one of the algorithms using rain attenuation, always underestimates the rainfall rate. The bias is larger for larger rain depth and has a possibility to give a significant error in estimating mean rainfall rate. The dual-frequency method, which is another algorithm using rain attenuation, has a bias that depends on the rain depth and the distance between two range gates where rain attenuation is estimated and shows large variations from overestimation to underestimation. The biases are also studied using actual rainfall rates.
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      Biases of Rain Retrieval Algorithms for Spaceborne Radar Caused by Nonuniformity of Rain

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4206844
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    contributor authorNakamura, Kenji
    date accessioned2017-06-09T16:18:56Z
    date available2017-06-09T16:18:56Z
    date copyright1991/06/01
    date issued1991
    identifier issn0739-0572
    identifier otherams-656.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4206844
    description abstractThe biases of various rain retrieval algorithms for a spaceborne rain radar due to nonuniformity of rain are studied using simple models and an actual time sequence of rainfall rate. A conventional rain retrieval algorithm in which measured radar reflectivity factors are simply converted to rainfall rates always overestimates the rainfall rate, but the bias is moderate. The surface reference method, which is one of the algorithms using rain attenuation, always underestimates the rainfall rate. The bias is larger for larger rain depth and has a possibility to give a significant error in estimating mean rainfall rate. The dual-frequency method, which is another algorithm using rain attenuation, has a bias that depends on the rain depth and the distance between two range gates where rain attenuation is estimated and shows large variations from overestimation to underestimation. The biases are also studied using actual rainfall rates.
    publisherAmerican Meteorological Society
    titleBiases of Rain Retrieval Algorithms for Spaceborne Radar Caused by Nonuniformity of Rain
    typeJournal Paper
    journal volume8
    journal issue3
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(1991)008<0363:BORRAF>2.0.CO;2
    journal fristpage363
    journal lastpage373
    treeJournal of Atmospheric and Oceanic Technology:;1991:;volume( 008 ):;issue: 003
    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
    yabeshDSpacePersian