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    Shortwave Infrared Spectroradiometer for Atmospheric Transmittance Measurements

    Source: Journal of Atmospheric and Oceanic Technology:;1998:;volume( 015 ):;issue: 001::page 174
    Author:
    Sicard, M.
    ,
    Thome, K. J.
    ,
    Crowther, B. G.
    ,
    Smith, M. W.
    DOI: 10.1175/1520-0426(1998)015<0174:SISFAT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The use of a shortwave infrared (SWIR) spectroradiometer as a solar radiometer is presented. The radiometer collects 1024 channels of data over the spectral range of 1.1?2.5 ?m. The system was tested by applying the Langley method to data collected at a high altitude site on two consecutive days. Data processed for the 1.15?1.32-?m and 1.47?1.75-?m spectral intervals show temporal results similar to those obtained with a well- understood, visible, and near-infrared radiometer having 10 channels in the 0.38?1.03-?m spectral range. A modified Langley method was used for spectral regions where strong water vapor absorption invalidates the Langley method. It is estimated that the exoatmospheric intercept of the spectroradiometer was determined to better than 4% in nonabsorption regions between 1.15 and 1.75 ?m and to better than 5% for a large portion of the 1.38-?m absorption band. These results, in addition to the agreement between the shortwave, and the visible and near-infrared radiometers, imply that the SWIR system operates well as a solar radiometer. The spectral optical depths from one day were used to determine a power-law aerosol size distribution using data from both the visible and near-infrared, and the shortwave infrared. The exponent derived for this power law differed from that obtained by using only the visible and near-infrared by 6%. Aerosol optical depths in the shortwave infrared derived from the visible and near-infrared results differed from the measured values by 0.005 at an optical depth of 0.016 and wavelength of 1.66 ?m.
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      Shortwave Infrared Spectroradiometer for Atmospheric Transmittance Measurements

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4149123
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorSicard, M.
    contributor authorThome, K. J.
    contributor authorCrowther, B. G.
    contributor authorSmith, M. W.
    date accessioned2017-06-09T14:09:57Z
    date available2017-06-09T14:09:57Z
    date copyright1998/02/01
    date issued1998
    identifier issn0739-0572
    identifier otherams-1365.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4149123
    description abstractThe use of a shortwave infrared (SWIR) spectroradiometer as a solar radiometer is presented. The radiometer collects 1024 channels of data over the spectral range of 1.1?2.5 ?m. The system was tested by applying the Langley method to data collected at a high altitude site on two consecutive days. Data processed for the 1.15?1.32-?m and 1.47?1.75-?m spectral intervals show temporal results similar to those obtained with a well- understood, visible, and near-infrared radiometer having 10 channels in the 0.38?1.03-?m spectral range. A modified Langley method was used for spectral regions where strong water vapor absorption invalidates the Langley method. It is estimated that the exoatmospheric intercept of the spectroradiometer was determined to better than 4% in nonabsorption regions between 1.15 and 1.75 ?m and to better than 5% for a large portion of the 1.38-?m absorption band. These results, in addition to the agreement between the shortwave, and the visible and near-infrared radiometers, imply that the SWIR system operates well as a solar radiometer. The spectral optical depths from one day were used to determine a power-law aerosol size distribution using data from both the visible and near-infrared, and the shortwave infrared. The exponent derived for this power law differed from that obtained by using only the visible and near-infrared by 6%. Aerosol optical depths in the shortwave infrared derived from the visible and near-infrared results differed from the measured values by 0.005 at an optical depth of 0.016 and wavelength of 1.66 ?m.
    publisherAmerican Meteorological Society
    titleShortwave Infrared Spectroradiometer for Atmospheric Transmittance Measurements
    typeJournal Paper
    journal volume15
    journal issue1
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(1998)015<0174:SISFAT>2.0.CO;2
    journal fristpage174
    journal lastpage183
    treeJournal of Atmospheric and Oceanic Technology:;1998:;volume( 015 ):;issue: 001
    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