Short-term Variability of Extinction by Broadband Stellar Photometry

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Aerosol optical depth variation over short-term time intervals is determined from broadband observations of stars with a whole sky imager. The main difficulty in such measurements consists of accurately separating the star flux value from the non-stellar diffuse skylight. Using correction method to overcome this difficulty, the monochromatic extinction at the ground due to aerosols is extracted from heterochromatic measurements. A form of closure is achieved by comparison with simultaneous or temporally close measurements with other instruments, and the total error of the method, as a combination of random error of measurements and systematic error of calibration and model, is ... continued below

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Musat, I.C. & Ellingson, R.G. March 18, 2005.

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Aerosol optical depth variation over short-term time intervals is determined from broadband observations of stars with a whole sky imager. The main difficulty in such measurements consists of accurately separating the star flux value from the non-stellar diffuse skylight. Using correction method to overcome this difficulty, the monochromatic extinction at the ground due to aerosols is extracted from heterochromatic measurements. A form of closure is achieved by comparison with simultaneous or temporally close measurements with other instruments, and the total error of the method, as a combination of random error of measurements and systematic error of calibration and model, is assessed as being between 2.6 and 3% rms.

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OSTI as DE00841538

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  • Fifteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting, Daytona Beach, FL (US), 03/14/2005--03/18/2005

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  • Report No.: none
  • Office of Scientific & Technical Information Report Number: 841538
  • Archival Resource Key: ark:/67531/metadc781899

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  • March 18, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • June 10, 2016, 6:13 p.m.

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Musat, I.C. & Ellingson, R.G. Short-term Variability of Extinction by Broadband Stellar Photometry, article, March 18, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc781899/: accessed June 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.