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    Nocturnal Aerosol Optical Depth Measurements with a Small-Aperture Automated Photometer Using the Moon as a Light Source

    Source: Journal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 010::page 1297
    Author:
    Berkoff, Timothy A.
    ,
    Sorokin, Mikail
    ,
    Stone, Tom
    ,
    Eck, Thomas F.
    ,
    Hoff, Raymond
    ,
    Welton, Ellsworth
    ,
    Holben, Brent
    DOI: 10.1175/JTECH-D-10-05036.1
    Publisher: American Meteorological Society
    Abstract: method is described that enables the use of lunar irradiance to obtain nighttime aerosol optical depth (AOD) measurements using a small-aperture photometer. In this approach, the U.S. Geological Survey lunar calibration system was utilized to provide high-precision lunar exoatmospheric spectral irradiance predictions for a ground-based sensor location, and when combined with ground measurement viewing geometry, provided the column optical transmittance for retrievals of AOD. Automated multiwavelength lunar measurements were obtained using an unmodified Cimel-318 sunphotometer sensor to assess existing capabilities and enhancements needed for day/night operation in NASA?s Aerosol Robotic Network (AERONET). Results show that even existing photometers can provide the ability for retrievals of aerosol optical depths at night near full moon. With an additional photodetector signal-to-noise improvement of 10?100, routine use over the bright half of the lunar phase and a much wider range of wavelengths and conditions can be achieved. Although the lunar cycle is expected to limit the frequency of observations to 30%?40% compared to solar measurements, nevertheless this is an attractive extension of AERONET capabilities.
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      Nocturnal Aerosol Optical Depth Measurements with a Small-Aperture Automated Photometer Using the Moon as a Light Source

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4227847
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    contributor authorBerkoff, Timothy A.
    contributor authorSorokin, Mikail
    contributor authorStone, Tom
    contributor authorEck, Thomas F.
    contributor authorHoff, Raymond
    contributor authorWelton, Ellsworth
    contributor authorHolben, Brent
    date accessioned2017-06-09T17:23:51Z
    date available2017-06-09T17:23:51Z
    date copyright2011/10/01
    date issued2011
    identifier issn0739-0572
    identifier otherams-84503.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227847
    description abstractmethod is described that enables the use of lunar irradiance to obtain nighttime aerosol optical depth (AOD) measurements using a small-aperture photometer. In this approach, the U.S. Geological Survey lunar calibration system was utilized to provide high-precision lunar exoatmospheric spectral irradiance predictions for a ground-based sensor location, and when combined with ground measurement viewing geometry, provided the column optical transmittance for retrievals of AOD. Automated multiwavelength lunar measurements were obtained using an unmodified Cimel-318 sunphotometer sensor to assess existing capabilities and enhancements needed for day/night operation in NASA?s Aerosol Robotic Network (AERONET). Results show that even existing photometers can provide the ability for retrievals of aerosol optical depths at night near full moon. With an additional photodetector signal-to-noise improvement of 10?100, routine use over the bright half of the lunar phase and a much wider range of wavelengths and conditions can be achieved. Although the lunar cycle is expected to limit the frequency of observations to 30%?40% compared to solar measurements, nevertheless this is an attractive extension of AERONET capabilities.
    publisherAmerican Meteorological Society
    titleNocturnal Aerosol Optical Depth Measurements with a Small-Aperture Automated Photometer Using the Moon as a Light Source
    typeJournal Paper
    journal volume28
    journal issue10
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH-D-10-05036.1
    journal fristpage1297
    journal lastpage1306
    treeJournal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;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
    yabeshDSpacePersian