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    Comparison of Dual-Polarization Radar Measurements of Rain with Ground-Based Disdrometer Measurements

    Source: Journal of Applied Meteorology:;1982:;volume( 021 ):;issue: 002::page 252
    Author:
    Goddard, J. W. F.
    ,
    Cherry, S. M.
    ,
    Bringi, V. N.
    DOI: 10.1175/1520-0450(1982)021<0252:CODPRM>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Dual-polarization radar measurements of ZH and ZDR, where ZDR = 10 logZH/ZV and ZH, ZV are the radar reflectivity factors for horizontal and vertical polarizations, respectively, are compared with values derived from raindrop-size distributions measured by a Joss-Waldvogel disdrometer. The measurements were made simultaneously, with the radar pulse volume situated 120 m above the ground-based disdrometer. Despite the difference in size of the respective sampling volumes, agreement between the radar and disdrometer measurements was generally good. The radar estimates of ZH exceeded the disdrometer estimates by 1.6 dB on average, well within the expected experimental error. The disdrometer estimates of ZDR exceeded the radar estimates by 0.3 dB on average. This was somewhat larger than could be accounted for by experimental error, and further analysis suggested that some modification to the theoretical ratios of horizontal and vertical backscattering cross sections was required, for drops of diameter <2.5 mm. An empirical modification to these ratios enabled the difference to be reduced to 0.15 dB on average.
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      Comparison of Dual-Polarization Radar Measurements of Rain with Ground-Based Disdrometer Measurements

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4145307
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    contributor authorGoddard, J. W. F.
    contributor authorCherry, S. M.
    contributor authorBringi, V. N.
    date accessioned2017-06-09T13:58:37Z
    date available2017-06-09T13:58:37Z
    date copyright1982/02/01
    date issued1982
    identifier issn0021-8952
    identifier otherams-10214.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4145307
    description abstractDual-polarization radar measurements of ZH and ZDR, where ZDR = 10 logZH/ZV and ZH, ZV are the radar reflectivity factors for horizontal and vertical polarizations, respectively, are compared with values derived from raindrop-size distributions measured by a Joss-Waldvogel disdrometer. The measurements were made simultaneously, with the radar pulse volume situated 120 m above the ground-based disdrometer. Despite the difference in size of the respective sampling volumes, agreement between the radar and disdrometer measurements was generally good. The radar estimates of ZH exceeded the disdrometer estimates by 1.6 dB on average, well within the expected experimental error. The disdrometer estimates of ZDR exceeded the radar estimates by 0.3 dB on average. This was somewhat larger than could be accounted for by experimental error, and further analysis suggested that some modification to the theoretical ratios of horizontal and vertical backscattering cross sections was required, for drops of diameter <2.5 mm. An empirical modification to these ratios enabled the difference to be reduced to 0.15 dB on average.
    publisherAmerican Meteorological Society
    titleComparison of Dual-Polarization Radar Measurements of Rain with Ground-Based Disdrometer Measurements
    typeJournal Paper
    journal volume21
    journal issue2
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1982)021<0252:CODPRM>2.0.CO;2
    journal fristpage252
    journal lastpage256
    treeJournal of Applied Meteorology:;1982:;volume( 021 ):;issue: 002
    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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