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    Efficient Differential Reflectivity Processing Using Logarithmic Receivers

    Source: Journal of Atmospheric and Oceanic Technology:;1989:;volume( 006 ):;issue: 004::page 663
    Author:
    Chandrasekar, V.
    ,
    Bringi, V. N.
    ,
    Gray, G. R.
    ,
    Keeler, R. J.
    DOI: 10.1175/1520-0426(1989)006<0663:EDRPUL>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The differential reflectivity (ZDR) measurement introduced by Seliga and Bringi has shown potential for extending cloud microphysical studies and improving rainfall rate measurement. The sensitivity of ZDR measurement requires it to be estimated with a high degree of accuracy. Our theoretical analysis and experimental observations show that the estimates of ZDR using log ratio estimators typically have twice the standard error compared to those from square law estimators. A ?lookup table technique? which converts the log value to the equivalent square law value prior to integration is proposed to improve the accuracy of ZDR estimates from logarithmic receivers. The size of the lookup table dictates the accuracy of the resulting ZDR estimate. Experimental observations demonstrate that the log receiver lookup table technique estimates ZDR to an accuracy nearly the same as that from a square law receiver. We present the implementation of this technique in integer arithmetic applied to the NCAR CP-2 radar.
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      Efficient Differential Reflectivity Processing Using Logarithmic Receivers

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4189512
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorChandrasekar, V.
    contributor authorBringi, V. N.
    contributor authorGray, G. R.
    contributor authorKeeler, R. J.
    date accessioned2017-06-09T15:39:37Z
    date available2017-06-09T15:39:37Z
    date copyright1989/08/01
    date issued1989
    identifier issn0739-0572
    identifier otherams-500.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4189512
    description abstractThe differential reflectivity (ZDR) measurement introduced by Seliga and Bringi has shown potential for extending cloud microphysical studies and improving rainfall rate measurement. The sensitivity of ZDR measurement requires it to be estimated with a high degree of accuracy. Our theoretical analysis and experimental observations show that the estimates of ZDR using log ratio estimators typically have twice the standard error compared to those from square law estimators. A ?lookup table technique? which converts the log value to the equivalent square law value prior to integration is proposed to improve the accuracy of ZDR estimates from logarithmic receivers. The size of the lookup table dictates the accuracy of the resulting ZDR estimate. Experimental observations demonstrate that the log receiver lookup table technique estimates ZDR to an accuracy nearly the same as that from a square law receiver. We present the implementation of this technique in integer arithmetic applied to the NCAR CP-2 radar.
    publisherAmerican Meteorological Society
    titleEfficient Differential Reflectivity Processing Using Logarithmic Receivers
    typeJournal Paper
    journal volume6
    journal issue4
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(1989)006<0663:EDRPUL>2.0.CO;2
    journal fristpage663
    journal lastpage670
    treeJournal of Atmospheric and Oceanic Technology:;1989:;volume( 006 ):;issue: 004
    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