Unified system of sky luminance patterns characterizing daylight availability and conditions in urban spaces

The proposed project will define the basic interrelations between radiance and luminance characteristics of sky patterns including their spectral properties as well as additional information about cloudiness and pollution situations. The research of the sky non-homogeneity as a more realistic daylight source can be based on analytical methods and expected results as well as on the refined more correct knowledge about sky luminance distributions has to be considered as the original contribution of this project.

The new concept determining sky luminance distributions can be applied in the design of more effective and innovative daylight technology, daylighting design in buildings, the evaluation of energy performance of buildings as well as in the prediction of skylight utilization in urban spaces and densely built-up areas. Currently, new daylighting criteria are needed, especially in regions where overcast skies are not dominant.