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    High-Resolution Imaging of the Ocean Surface Backscatter by Inversion of Altimeter Waveforms

    Source: Journal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 008::page 1050
    Author:
    Tournadre, Jean
    ,
    Chapron, Bertrand
    ,
    Reul, Nicolas
    DOI: 10.1175/2011JTECHO820.1
    Publisher: American Meteorological Society
    Abstract: his paper presents a new method to analyze high-resolution altimeter waveforms in terms of surface backscatter. Over the ocean, a basic assumption of modeling altimeter echo waveforms is to consider a homogeneous sea surface within the altimeter footprint that can be described by a mean backscatter coefficient. When the surface backscatter varies strongly at scales smaller than the altimeter footprint size, such as in the presence of surface slicks, rain, small islands, and altimeter echoes can be interpreted as high-resolution images of the surface whose geometry is annular and not rectangular. A method based on the computation of the imaging matrix and its pseudoinverse to infer the surface backscatter at high resolution (~300 m) from the measured waveforms is presented. The method is tested using synthetic waveforms for different surface backscatter fields and is shown to be unbiased and accurate. Several applications can be foreseen to refine the analysis of rain patterns, surface slicks, and lake surfaces. The authors choose here to focus on the small-scale variability of backscatter induced by a submerged reef smaller than the altimeter footprint as the function of tide, significant wave height, and wind.
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      High-Resolution Imaging of the Ocean Surface Backscatter by Inversion of Altimeter Waveforms

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4214106
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    contributor authorTournadre, Jean
    contributor authorChapron, Bertrand
    contributor authorReul, Nicolas
    date accessioned2017-06-09T16:40:57Z
    date available2017-06-09T16:40:57Z
    date copyright2011/08/01
    date issued2011
    identifier issn0739-0572
    identifier otherams-72136.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4214106
    description abstracthis paper presents a new method to analyze high-resolution altimeter waveforms in terms of surface backscatter. Over the ocean, a basic assumption of modeling altimeter echo waveforms is to consider a homogeneous sea surface within the altimeter footprint that can be described by a mean backscatter coefficient. When the surface backscatter varies strongly at scales smaller than the altimeter footprint size, such as in the presence of surface slicks, rain, small islands, and altimeter echoes can be interpreted as high-resolution images of the surface whose geometry is annular and not rectangular. A method based on the computation of the imaging matrix and its pseudoinverse to infer the surface backscatter at high resolution (~300 m) from the measured waveforms is presented. The method is tested using synthetic waveforms for different surface backscatter fields and is shown to be unbiased and accurate. Several applications can be foreseen to refine the analysis of rain patterns, surface slicks, and lake surfaces. The authors choose here to focus on the small-scale variability of backscatter induced by a submerged reef smaller than the altimeter footprint as the function of tide, significant wave height, and wind.
    publisherAmerican Meteorological Society
    titleHigh-Resolution Imaging of the Ocean Surface Backscatter by Inversion of Altimeter Waveforms
    typeJournal Paper
    journal volume28
    journal issue8
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2011JTECHO820.1
    journal fristpage1050
    journal lastpage1062
    treeJournal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 008
    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