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    Computer Simulation of Irradiance Measurements from Aircraft

    Source: Journal of Applied Meteorology:;1977:;volume( 016 ):;issue: 002::page 167
    Author:
    Poellot, Michael R.
    ,
    Cox, Stephen K.
    DOI: 10.1175/1520-0450(1977)016<0167:CSOIMF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A computer simulation has been developed to optimize the use of the aircraft platform for the measurement of shortwave irradiances. This model simulates the measurement of radiative fluxes in order to determine the approximate sample sizes required under various conditions of cloudiness. The simulated required sampling length or averaging distance was found to be inversely proportional to the height of the sensor above or below the cloud field. The magnitude of the averaging distance and the rate of its decrease with height are the result of signal variations on two scales. Near the cloud surface the data have a high variance due to small-scale, large-amplitude variations in the irradiance. These fluctuations are rapidly smoothed as the aircraft-cloud separation increases. The longer period oscillations are not as easily smoothed. When the aircraft is farther from the cloud, large-scale effects become the primary control on the averaging distance.
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      Computer Simulation of Irradiance Measurements from Aircraft

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4232697
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    contributor authorPoellot, Michael R.
    contributor authorCox, Stephen K.
    date accessioned2017-06-09T17:38:57Z
    date available2017-06-09T17:38:57Z
    date copyright1977/02/01
    date issued1977
    identifier issn0021-8952
    identifier otherams-9231.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4232697
    description abstractA computer simulation has been developed to optimize the use of the aircraft platform for the measurement of shortwave irradiances. This model simulates the measurement of radiative fluxes in order to determine the approximate sample sizes required under various conditions of cloudiness. The simulated required sampling length or averaging distance was found to be inversely proportional to the height of the sensor above or below the cloud field. The magnitude of the averaging distance and the rate of its decrease with height are the result of signal variations on two scales. Near the cloud surface the data have a high variance due to small-scale, large-amplitude variations in the irradiance. These fluctuations are rapidly smoothed as the aircraft-cloud separation increases. The longer period oscillations are not as easily smoothed. When the aircraft is farther from the cloud, large-scale effects become the primary control on the averaging distance.
    publisherAmerican Meteorological Society
    titleComputer Simulation of Irradiance Measurements from Aircraft
    typeJournal Paper
    journal volume16
    journal issue2
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1977)016<0167:CSOIMF>2.0.CO;2
    journal fristpage167
    journal lastpage171
    treeJournal of Applied Meteorology:;1977:;volume( 016 ):;issue: 002
    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