Occurrence of standard skies during typical daytime half-days

摘要: The current trials to introduce new daylight assessment criteria for future building designs as well renewable energy simulations with the trend implement annual profiles a specific locale or region need more detail information on exterior conditions. Bratislava is only locality in Central Europe where CIE-IDMP general station recording 1-min regular measurements since 1994 and 10-year data gathered can be used now derive models valid wider regions. In this paper, analysis of sky-type occurrence representing conditions single site. As meteorological net observatories register sunshine duration longer periods worldwide, also may serve basis modelling illuminance courses typical sky when no other are available. Furthermore, General Sky Standard adopted by CIE 2003 ISO 2004 gives possibility study actual skies occurring under four characteristic situations associated during half-days.