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3 November 2003 Statistics of Alaskan clouds from the Infrared Cloud Imager (ICI)
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The Infrared Cloud Imager (ICI) is a ground-based infrared thermal imaging system used to identify and classify clouds based on the downwelling atmospheric radiance in the 8-14 μm wavelength region. Data obtained during a deployment in Barrow, Alaska during February - May 2002 has been combined with radiosonde and microwave radiometer data to calculate spatial cloud statistics for the months of March and April 2002. The results show a general trend of increasing cloudiness during this period, and a short transition time between clear and cloudy skies. A comparison of cloud statistics computed from the full ICI images with statistics computed from a single ICI pixel suggest that a point sensor would underestimate cloudiness during this data period.
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Joseph A. Shaw and Brentha Thurairajah "Statistics of Alaskan clouds from the Infrared Cloud Imager (ICI)", Proc. SPIE 5157, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research V, (3 November 2003);

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