Norm

ISO 15469:2004 en

Ruimtelijke verdeling van daglicht - Algemene hemel volgens de CIE norm

48,19

Over deze norm

Status Definitief
Aantal pagina's 7
Commissie Verlichting
Gepubliceerd op 15-02-2004
Taal Engels
This Standard defines a set of outdoor daylight conditions linking sunlight and skylight for theoretical and practical purposes. The luminance distributions given have the following characteristics: i. They are symmetrical about the solar meridian and are functions of the angular distance, Zs, between the sun and the zenith. ii. They are defined by smooth continuous functions. Such distributions are typical of cloudless skies and of those where the cloud cover is homogeneous. They provide an approximation to skies of broken cloud that is sufficiently accurate for many practical daylight calculation purposes. iii. The relative luminance at any point in the sky depends on the angle, _, between that sky element and the sun, and on the angle, Z, between the sky element and the zenith. It is given in terms of two functions: the relative scattering indicatrix, f(_), and the luminance gradation between horizon and zenith, _(Z).

Details

ICS-code 17.180.20
Nederlandse titel Ruimtelijke verdeling van daglicht - Algemene hemel volgens de CIE norm
Engelse titel Spatial distribution of daylight - CIE standard general sky
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