Results 251 to 260 of about 569,876 (277)
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1971 IEEE Conference on Decision and Control, 1971
A method of converting a picture into a "cartoon" or "map" whose regions correspond to differently textured regions is described. Texture edges in the picture are detected, and solid regions surrounded by these (usually broken) edges are "colored in" using a propagation process.
James Strong, Azriel Rosenfeld
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A method of converting a picture into a "cartoon" or "map" whose regions correspond to differently textured regions is described. Texture edges in the picture are detected, and solid regions surrounded by these (usually broken) edges are "colored in" using a propagation process.
James Strong, Azriel Rosenfeld
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Night-time cloud cover estimation
International Journal of Remote Sensing, 2004In this paper a method for cloud cover assessment at night-time (when only thermal infrared data are available) is presented. It is based on the analysis of long wave radiation transfer processes in partially cloudy areas, which led to the formulation of a simplified model of the surface–cloud–atmosphere system.
F. Sospedra +5 more
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Cloud Cover Statistics Using VAS
SPIE Proceedings, 1988Statistics of cloud characteristics over North. America have been calculated for the past two years. The frequency of cloud cover with the associated heights and infrared attenuation were charted using the CO2 channel radiometric data from the geostationary VISSR Atmospheric Sounder (VAS).
D P. Wylie, W P. Menzel
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Science Activities: Classroom Projects and Curriculum Ideas, 2007
The purpose of this activity was to help students understand the percentage of cloud cover and make more accurate cloud cover observations. Students estimated the percentage of cloud cover represented by simulated clouds and assigned a cloud cover classification to those simulations.
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The purpose of this activity was to help students understand the percentage of cloud cover and make more accurate cloud cover observations. Students estimated the percentage of cloud cover represented by simulated clouds and assigned a cloud cover classification to those simulations.
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2017
Cloud is an aggregate of very small water droplets, ice crystals, or a mixture of both, with its base above the Earth’s surface, which is perceivable from the observation location. The limiting liquid particle diameter is of the order of 200 µm; drops larger than this comprise drizzle or rain. The chapter describes types of clouds on the basis of their
Latief Ahmad +3 more
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Cloud is an aggregate of very small water droplets, ice crystals, or a mixture of both, with its base above the Earth’s surface, which is perceivable from the observation location. The limiting liquid particle diameter is of the order of 200 µm; drops larger than this comprise drizzle or rain. The chapter describes types of clouds on the basis of their
Latief Ahmad +3 more
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Radiometric Estimation of Cloud Cover
Journal of Atmospheric and Oceanic Technology, 1985Abstract Estimates of cloud cover based on all-sky temporal and spatial radiometric measurements of downward longwave radiation are compared with visual estimates of the same cloud cover. A detailed comparison of the two estimates over a five-week study period show the radiometric method to be very reliable. Examination of radiometric data taken over a
C. A. Coombes, A. W. Harrison
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Determination of cloud cover parameters
Computational Problems of Electrical Engineering, 2017A methodology for determining the virtual density of clouds, which takes into account both the values of direct and reflected solar radiation, using the method of reverse transformation is given. Beer’s law presented in the paper describes a decrease in the total radiation intensity, calculated per unit of the surface area perpendicular to the ...
Kateryna Osypenko, Valery Zhuikov
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Data-Driven Cloud Cover Parameterizations
2023A promising approach to improve cloud parameterizations within climate models, and thus climate projections, is to train machine learning algorithms on storm-resolving model (SRM) output. The ICOsahedral Non-hydrostatic (ICON) modeling framework permits simulations ranging from numerical weather prediction to climate projections, making it an ideal ...
Arthur Grundner +5 more
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Spatial distribution of cloud cover
International Journal of Satellite Communications and Networking, 2008AbstractSatellite systems and high‐altitude platform systems working in Ka and V bands require the application of adaptive techniques in order to mitigate link degradations caused by atmospheric impairments such as those due to cloud cover. Among these techniques, resource sharing system techniques and site diversity need information on the spatial ...
Pedro Garcia +2 more
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Cloud Cover and Climate Sensitivity
Journal of the Atmospheric Sciences, 1980Abstract This study discusses how the sensitivity of climate may be affected by the variation of cloud cover based on the results from numerical experiments with a highly simplified, three-dimensional model of the atmospheric general circulation. The model explicitly computes the heat transport by large-scale atmospheric disturbances.
Richard T. Wetherald, Syukuro Manabe
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