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    On the Extraction of Near-Surface Index of Refraction Using Radar Phase Measurements from Ground Targets

    Source: Journal of Atmospheric and Oceanic Technology:;1997:;volume( 014 ):;issue: 004::page 978
    Author:
    Fabry, Frédéric
    ,
    Frush, Chuck
    ,
    Zawadzki, Isztar
    ,
    Kilambi, Alamelu
    DOI: 10.1175/1520-0426(1997)014<0978:OTEONS>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The speed at which electromagnetic waves travel between a radar and a target is dependent on the index of refraction of the atmosphere between the radar and the target. Modern radars can have sufficiently accurate time bases and digitizing equipment to observe small changes in the time it takes a radar signal to travel to a fixed target and back. These changes are related to small perturbations in the refractive index caused by changes in humidity, temperature, and pressure. Using the phase information from ground targets and its time evolution as a proxy for the changes in travel time of radar waves, a procedure for measuring the near-surface index of the refraction field around the radar is demonstrated and implemented on the McGill Doppler S-band radar. This paper describes the theory behind the measurement, and a technique used to extract refractive index data from ground targets. Early measurements of the index of refraction field are also presented, and some of the possibilities offered by this new radar-measured variable are identified.
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      On the Extraction of Near-Surface Index of Refraction Using Radar Phase Measurements from Ground Targets

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4148479
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    contributor authorFabry, Frédéric
    contributor authorFrush, Chuck
    contributor authorZawadzki, Isztar
    contributor authorKilambi, Alamelu
    date accessioned2017-06-09T14:08:06Z
    date available2017-06-09T14:08:06Z
    date copyright1997/08/01
    date issued1997
    identifier issn0739-0572
    identifier otherams-1307.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4148479
    description abstractThe speed at which electromagnetic waves travel between a radar and a target is dependent on the index of refraction of the atmosphere between the radar and the target. Modern radars can have sufficiently accurate time bases and digitizing equipment to observe small changes in the time it takes a radar signal to travel to a fixed target and back. These changes are related to small perturbations in the refractive index caused by changes in humidity, temperature, and pressure. Using the phase information from ground targets and its time evolution as a proxy for the changes in travel time of radar waves, a procedure for measuring the near-surface index of the refraction field around the radar is demonstrated and implemented on the McGill Doppler S-band radar. This paper describes the theory behind the measurement, and a technique used to extract refractive index data from ground targets. Early measurements of the index of refraction field are also presented, and some of the possibilities offered by this new radar-measured variable are identified.
    publisherAmerican Meteorological Society
    titleOn the Extraction of Near-Surface Index of Refraction Using Radar Phase Measurements from Ground Targets
    typeJournal Paper
    journal volume14
    journal issue4
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(1997)014<0978:OTEONS>2.0.CO;2
    journal fristpage978
    journal lastpage987
    treeJournal of Atmospheric and Oceanic Technology:;1997:;volume( 014 ):;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