Simulation of daylight performance of buildings by the daylight source model based on geostational meteorological satellite images

This paper introduces a method to simulate the day-light performance of buildings using geostational me- teorological satellite images. A new statistical method enables to estimate global and direct solar irradiance values at hourly intervals by the pixel values of satel- lites images. Luminous efficiency functions convert the global and direct irradiance values into diffuse and direct daylight illuminance values. The daylight source model is combined with a daylight calculation program to calculate spatial and temporal distributions of illu- minance and luminance. As a result, the daylight per- formance of buildings is able to be estimated in various weather conditions at any location and time.