Results obtained using SPCTRAL2 parametric model for the polluted urban atmosphere of Athens, Greece, were analysed and compared with ground level experimental spectral solar irradiance measurements and spectrally integrated solar irradiances in two discrete narrow bands, ultraviolet and...

This work concerns the calculation of sunrise and sunset hours at a location on complex terrain. This is particularly important to all solar irradiance and illuminance codes that estimate solar irradiance or illuminance on horizontal or inclined surfaces on a specific day at a location on...

This paper presents a comparison of several models against measurements of daily total solar radiation on surfaces of various tilts and azimuths in Athens. Such measurements are carried out at the Institute of Meteorology and Physics of the Atmospheric Environment, National Observatory of Athens...

This study correlates experimental values with modelled values of global (KT) and diffuse (KD) clearness index in Athens, Greece. The experimental values come from measurements of daily global and diffuse solar irradiation on horizontal surface, while the modelled ones are from linear regression...

In the present work, we studied the exterior daylight conditions in Sheffield in Central England (53.38° N, 1.50° W) during winter. The study makes use of the 15 standard sky types defined by Kittler et al. These sky types are presented as diagrams of the ratio of the zenith luminance (Lz) to...

The present study is concerned with the generation of a Typical Meterological Year for Nicosia, Cyprus. The above tool will be useful for the prediction and comparison of the performance and cost effectiveness of passive and active solar systems in the island. The Typical Meteorological Year was...