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    An Example Crossover Experiment for Testing New Vicarious Calibration Techniques for Satellite Ocean Color Radiometry

    Source: Journal of Atmospheric and Oceanic Technology:;2010:;volume( 027 ):;issue: 010::page 1747
    Author:
    Voss, Kenneth J.
    ,
    McLean, Scott
    ,
    Lewis, Marlon
    ,
    Johnson, Carol
    ,
    Flora, Stephanie
    ,
    Feinholz, Michael
    ,
    Yarbrough, Mark
    ,
    Trees, Charles
    ,
    Twardowski, Mike
    ,
    Clark, Dennis
    DOI: 10.1175/2010JTECHO737.1
    Publisher: American Meteorological Society
    Abstract: Vicarious calibration of ocean color satellites involves the use of accurate surface measurements of water-leaving radiance to update and improve the system calibration of ocean color satellite sensors. An experiment was performed to compare a free-fall technique with the established Marine Optical Buoy (MOBY) measurement. It was found in the laboratory that the radiance and irradiance instruments compared well within their estimated uncertainties for various spectral sources. The spectrally averaged differences between the National Institute of Standards and Technology (NIST) values for the sources and the instruments were <2.5% for the radiance sensors and <1.5% for the irradiance sensors. In the field, the sensors measuring the above-surface downwelling irradiance performed nearly as well as they had in the laboratory, with an average difference of <2%. While the water-leaving radiance Lw calculated from each instrument agreed in almost all cases within the combined instrument uncertainties (approximately 7%), there was a relative bias between the two instrument classes/techniques that varied spectrally. The spectrally averaged (400?600 nm) difference between the two instrument classes/techniques was 3.1%. However, the spectral variation resulted in the free-fall instruments being 0.2% lower at 450 nm and 5.9% higher at 550 nm. Based on the analysis of one matchup, the bias in Lw was similar to that observed for Lu(1 m) with both systems, indicating the difference did not come from propagating Lu(1 m) to Lw.
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      An Example Crossover Experiment for Testing New Vicarious Calibration Techniques for Satellite Ocean Color Radiometry

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4213021
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorVoss, Kenneth J.
    contributor authorMcLean, Scott
    contributor authorLewis, Marlon
    contributor authorJohnson, Carol
    contributor authorFlora, Stephanie
    contributor authorFeinholz, Michael
    contributor authorYarbrough, Mark
    contributor authorTrees, Charles
    contributor authorTwardowski, Mike
    contributor authorClark, Dennis
    date accessioned2017-06-09T16:37:30Z
    date available2017-06-09T16:37:30Z
    date copyright2010/10/01
    date issued2010
    identifier issn0739-0572
    identifier otherams-71160.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4213021
    description abstractVicarious calibration of ocean color satellites involves the use of accurate surface measurements of water-leaving radiance to update and improve the system calibration of ocean color satellite sensors. An experiment was performed to compare a free-fall technique with the established Marine Optical Buoy (MOBY) measurement. It was found in the laboratory that the radiance and irradiance instruments compared well within their estimated uncertainties for various spectral sources. The spectrally averaged differences between the National Institute of Standards and Technology (NIST) values for the sources and the instruments were <2.5% for the radiance sensors and <1.5% for the irradiance sensors. In the field, the sensors measuring the above-surface downwelling irradiance performed nearly as well as they had in the laboratory, with an average difference of <2%. While the water-leaving radiance Lw calculated from each instrument agreed in almost all cases within the combined instrument uncertainties (approximately 7%), there was a relative bias between the two instrument classes/techniques that varied spectrally. The spectrally averaged (400?600 nm) difference between the two instrument classes/techniques was 3.1%. However, the spectral variation resulted in the free-fall instruments being 0.2% lower at 450 nm and 5.9% higher at 550 nm. Based on the analysis of one matchup, the bias in Lw was similar to that observed for Lu(1 m) with both systems, indicating the difference did not come from propagating Lu(1 m) to Lw.
    publisherAmerican Meteorological Society
    titleAn Example Crossover Experiment for Testing New Vicarious Calibration Techniques for Satellite Ocean Color Radiometry
    typeJournal Paper
    journal volume27
    journal issue10
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2010JTECHO737.1
    journal fristpage1747
    journal lastpage1759
    treeJournal of Atmospheric and Oceanic Technology:;2010:;volume( 027 ):;issue: 010
    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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