Physics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986smrb.symp...97n&link_type=abstract
In Ludwig-Maximilians-Universitaet Satellite Measurements of Radiation Budget of the Earth (3rd Symposium) p 97-105 (SEE N87-15
Physics
Cluster Analysis, Earth Albedo, Satellite Observation, Surface Temperature, Diurnal Variations, Histograms, Image Analysis, Satellite Imagery, Time Series Analysis
Scientific paper
A cluster analysis of two-dimensional histograms (visible and infrared satellite observations) is applied to derive surface properties as albedo and temperature. Derivation of planetary albedo and brightness temperature for a clear sky scene is described. It is shown for ocean and land scenes, how well the clear sky scene clusters (ground clusters) can be determined in the two-dimensional histograms and which additional information is needed. The classification of ground clusters is based on time series of the characteristic radiances, assuming that: ground albedo is constant over a few days; over the ocean the ground albedo shows a characteristic diurnal variation; the diurnal course of the ground temperature is known; and ground temperature is constant during a period of a few days (for a fixed time of day). Results for a region of the west coast of South America and the adjacent ocean derived from the GOES-East observations as part of the pilot data set of the International Satellite Cloud Climatology Project are shown.
Nacke G.
Ruprecht Eberhard
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