SPATIALLY RESOLVED SPECTRAL SKY DAYLIGHT MEASUREMENT DATA: METHODS OF COLLECTION, EVALUATION AND REPRESENTATION (PO68, 1036-1046)

Measurements of orientation-depending colorimetric characteristics of daylight conditions can be used in research, lighting design and product development, especially when looking into spectral selective materials or non-visual effects of light. To provide designers, researchers and engineers with validated spatially resolved spectral data, a cooperation between institutes is planned within a Research Forum of CIE Division 3 ?Interior Environment and Lighting Design?. The aim of this collaboration is an aligned approach of data collection, evaluation and representation of spatially resolved spectral sky data. Both collection and processing are illustrated by using information from measuring sites in Berlin and Beijing. The paper includes the description and comparison of measuring equipment, incorporating applied calibration procedures and discrepancies. Additionally, the paper presents examples of spectral data sets for both Beijing and Berlin, being a result of alignment of data evaluation and representation.