The most common type of satellite climatology is a cloud composite, which is a measure of the frequency/persistence of clouds over a particular region. Cloud composites can be derived from geostationary or polar orbiting satellites, but the work here focuses on the use of GOES imagery. Because of the great spatial coverage, diurnal composites of imagery over monthly, seasonal, and annual time scales can reveal the amplitude of diurnal cloudiness in relation to geographic features such as land/water boundaries and changes in elevation.